WO2004036637A1 - 回転式シリコンウエハ洗浄装置 - Google Patents
回転式シリコンウエハ洗浄装置 Download PDFInfo
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- WO2004036637A1 WO2004036637A1 PCT/JP2003/011667 JP0311667W WO2004036637A1 WO 2004036637 A1 WO2004036637 A1 WO 2004036637A1 JP 0311667 W JP0311667 W JP 0311667W WO 2004036637 A1 WO2004036637 A1 WO 2004036637A1
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- WO
- WIPO (PCT)
- Prior art keywords
- silicon wafer
- mixed gas
- hydrogen
- connecting pipe
- rotary
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/67034—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for drying
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02041—Cleaning
- H01L21/02043—Cleaning before device manufacture, i.e. Begin-Of-Line process
- H01L21/02052—Wet cleaning only
Definitions
- the present invention relates to an improvement of a rotary silicon wafer cleaning apparatus used in a semiconductor manufacturing apparatus and the like, and in a drying step after cleaning, a complete hydrogen termination treatment is performed on an outer surface of a silicon wafer.
- the present invention relates to a rotary silicon wafer cleaning apparatus that stabilizes the outer surface of a silicon wafer and enables a significant improvement in the quality thereof.
- the manufacture of various semiconductor devices generally starts with a silicon wafer cleaning process, and the silicon wafer subjected to the cleaning process is subjected to various processes such as formation of a SiO film.
- a so-called rotary silicon wafer cleaning apparatus has been widely used, and a silicon wafer set on a rotating disk in the apparatus body is rotated at a high speed (about 200 ⁇ m). 0 RPM), and then spraying it with a chemical detergent such as hydrofluoric acid, followed by acid cleaning, followed by cleaning with pure water, etc., and finally, the silicon wafer after pure water cleaning.
- a chemical detergent such as hydrofluoric acid
- the outer surface of the silicon wafer cleaned by the above-mentioned conventional rotary silicon wafer cleaning apparatus has a so-called surface Si exposed, and a hydrogen atom is bonded to the exposed Si atom to form an outer surface.
- the surface is in a so-called hydrogen-terminated state, and is a highly stable clean surface with almost no impurity atoms etc. directly adhering to Si.
- so-called natural oxidation hardly occurs on the surface layer even if left in the air for a long time.
- the above-described problem in the conventional rotary type silicon wafer cleaning apparatus that is, an oxide film or the like is naturally formed on the outer surface of the wafer after the cleaning process with the passage of time.
- the problem of not being able to prevent or delay the formation of wafers is to solve the problem.
- the inventors of the present invention conclude that the relatively low stability of the outer surface of the wafer processed by the conventional rotary wafer cleaning apparatus is due to the incomplete hydrogen termination treatment of the si outer surface. It was considered that either of the above or that there were spots of hydrogen termination.
- an inert gas for example, N 2
- the stability of the Si outer surface can be extended over a long period of time.
- a rotary silicon wafer cleaning apparatus in which the silicon wafer after chemical cleaning is cleaned with pure water, hydrogen gas containing 0.5% V o 1% or more of hydrogen gas attached to the case
- a gas supply panel 5 for supplying a mixed gas with an active gas
- a mixed gas supply pipe A having one end connected to a gas mixer 14 of the gas supply panel 5, and a mixed gas in the mixed gas supply pipe
- a mixed gas heating device B for heating the mixed gas heating device B
- a hydrogen radical generating apparatus C provided with a platinum coating film that forms hydrogen radicals therein.
- the silicon wafer drying apparatus 1 is provided, and the mixed gas containing hydrogen radicals generated by the hydrogen radical generating apparatus C is washed.
- the basic configuration of the present invention is to dry the outer surface of the silicon wafer 4 and perform a hydrogen termination process by spraying onto the rotating silicon wafer 4.
- the invention according to claim 2 is the vertical connecting pipe according to claim 1, wherein the mixed gas supply pipe A is supported by the case body 2 so as to be movable upward and downward and rotatably in the circumferential direction. 7 and a horizontal connecting pipe 10 connected to the other end of the vertical connecting pipe 7 and supported in the horizontal direction, and the vertical connecting pipe 7 is moved upward and downward by an elevating rotary drive device 8. It is configured so as to be movable and rotatable in forward and reverse directions.
- the mixed gas heating device B is a sheath heater provided in a part of the mixed gas supply pipe A, and the mixed gas heating device B converts the mixed gas into a 15 It is configured to heat to a temperature of 0 ° C. or higher.
- the invention of claim 4 is the same as the invention of claim 1, except that the hydrogen radical generator C is provided with a hydrogen radio gas generating / spraying device 11 having a platinum coating filter fixed to the end of the mixed gas supply pipe A. It is intended to be.
- the mixing ratio of the hydrogen gas is set to 0.05 Vo 1% to 5.0 Vo 1%.
- the vertical connecting pipe 7 includes a connecting pipe main body 15 at an upper portion thereof and a sheath heater 16 inserted therein.
- the invention according to claim 7 is the invention according to claim 2, wherein the horizontal connecting pipe 10 with a heater is provided with an outer pipe 17 made of stainless steel and a spacer 18 interposed therein.
- a horizontal connecting pipe with heater 10 comprising an aluminum foil cover 21 surrounding the pipe.
- the invention of claim 8 is the invention according to claim 2, wherein the vertical connecting pipe 7 is moved up and down and rotated.
- the distance between the lower surface of the platinum-coated filter 26 and the upper surface of the silicon wafer 4 opposing the lower surface of the platinum-coated filter 26 is set to 0.5 mn!
- the hydrogen radical generator / sprayer 11 is held and fixed at a position of about 3 mm.
- the temperature of the mixed gas supplied to the hydrogen radical generation / sprayer 11 is set to 150 ° C. to 300 ° C. is there.
- the invention according to claim 10 is the invention according to claim 4, wherein the sprayer 11 comprises an inverted dish-shaped upper main body 23 having a mixed gas inlet 23 a in the center of the upper wall.
- Hydrogen radical generation / sprayer 1 consisting of a flange 24 and a platinum-coated filter 26 fixed to the lower surface of the filter flange 24 and having a platinum-coated layer formed on a porous disk made of stainless steel sintered material It is assumed to be 1.
- FIG. 1 is a front view of a wafer cleaning apparatus according to an embodiment of the present invention.
- FIG. 2 is a right side view of FIG.
- FIG. 3 is a schematic cross-sectional view taken along the line AA of FIG.
- FIG. 4 is a schematic cross-sectional view taken along the line BB of FIG.
- FIG. 5 is a system diagram showing the configuration of the gas supply panel.
- FIG. 6 is a schematic cross-sectional view of a vertical connection pipe with a heater.
- FIG. 7 is a schematic cross-sectional view of a horizontal connecting pipe with a heater.
- Figure 8 shows a characteristic curve showing the relationship between temperature and reaction rate in the reaction between hydrogen and oxygen activated by a platinum catalyst.
- FIG. 9 shows a Si—H infrared absorption characteristic curve of the silicon wafer immediately after the hydrogen termination treatment according to the present invention.
- A is a mixed gas supply pipe
- B is a mixed gas heating device
- C is a hydrogen radical generator
- 1 is a silicon wafer drying device
- 2 is a case body
- 3 is a wafer support / rotation drive device
- 3 a is a support disk
- 3 b is a rotary drive
- 4 is a silicon wafer
- 5 is a gas supply panel
- 6 is a flexible connecting pipe
- 7 is a vertical connecting pipe
- 8 is a vertical drive rotary drive
- 9 is Vertical connecting pipe with heater
- 1 1 is hydrogen radical generation 'sprayer
- 1 2 a is pressure regulator
- 1 2 b is pressure gauge
- 1 2 c is mass flow controller
- 1 2 d 1 2 e is a valve
- 13 a is a pressure regulator
- 13 b is a pressure gauge
- 13 c is a mass flow controller
- 13 d '13 e is a valve
- 14 is a gas mixer
- 15 is a connecting pipe Main
- FIG. 1 is a front view of a rotary silicon wafer cleaning apparatus according to an embodiment of the present invention
- FIG. 2 is a side view thereof
- FIG. 3 is a schematic cross-sectional view taken along line AA of FIG. 2, and
- a so-called single-wafer cleaning apparatus is used as a base, but the type of the cleaning apparatus may be any type as long as it is a rotary cleaning apparatus.
- 1 is a silicon wafer drying device
- 2 is a case main body
- 3 is a wafer support / rotation drive device
- 3a is a support disk
- 3b is a rotation drive unit
- 4 is a silicon wafer
- 6 is a flexible connecting pipe
- 7 is a vertical connecting pipe
- 8 is a vertical drive pipe
- 9 is a vertical connecting pipe with a heater
- 10 is a horizontal connecting pipe with a heater
- 11 is a hydrogen radical generator. It is a vessel.
- A is a mixed gas supply pipe composed of a flexible connection pipe 6, a vertical connection pipe 7, a vertical connection pipe 9 with a heater, a horizontal connection pipe 10 with a heater, etc.
- B is a mixing gas supply pipe provided in a part of the mixed gas supply pipe A.
- the gas heating device C is a hydrogen radical generator provided downstream of the mixed gas heating device B.
- the rotary silicon wafer cleaning apparatus includes a silicon wafer drying apparatus 1 including a gas supply panel 5, a mixed gas supply pipe A, a mixed gas heating apparatus B, a hydrogen radical generator C, and the like, which will be described later, in a case main body 2.
- Support / rotation drive unit 3 for wafer 4 composed of disk 3a and rotation drive unit 3b, etc., automatic insertion / removal device for wafer 4 (not shown), and automatic loading / unloading device for wafer 4 (not shown)
- chemical cleaning such as hydrofluoric acid It is formed by disposing a sprayer for chemicals (not shown) and a sprayer for cleaning water such as pure water (not shown).
- the support of the wafer composed of the support disk 3a and the rotation drive unit 3b.
- the rotation drive device 3 the automatic wafer insertion / removal device, the automatic wafer carry-in / out device, the chemical cleaning agent spray device, and pure water cleaning. Since the water injection device and the like are publicly known, a detailed description thereof is omitted here.
- the gas supply panel 5 is disposed and fixed to a side portion inside the case body 2, and as shown in FIG. 5, a mixed gas G of an inert gas (for example, N 2 gas) not reacting with hydrogen and H 2 gas is supplied. Hydrogen radicals are supplied to the sprayer 11 through a mixed gas supply pipe A including a flexible connection pipe 6, a vertical connection pipe 7, a vertical connection pipe 9 with a heater, and a horizontal connection pipe 10 with a heater, which will be described later.
- a mixed gas G of an inert gas for example, N 2 gas
- the gas supply panel 5 and the like are stored in the case main body 2, but may be provided outside the case main body 2. Further, in the present embodiment, the heating of the mixed gas G, which will be described later, is performed in two places: the vertical connection pipe 9 with a heater and the horizontal connection pipe 10 with a heater. Alternatively, it may be performed only with the latter horizontal connection pipe with heater 10.
- the configuration itself of the force mixed gas heating device B that forms the mixed gas heating device B by the heater provided in the vertical connecting pipe 9 and the horizontal connecting pipe 10 is not limited.
- the heating method for the mixed gas G may be an indirect heating method or a direct heating method.
- the gas supply panel 5, N 2 consisting of the pressure regulator 1 2 a, pressure gauge 1 2 b 'the lifting port controller 1 2 c' valve 1 2 d ⁇ 1 2 e as shown in FIG. 5 a supply line, a pressure regulator 1 3 a ⁇ manometer 1 3 b 'the lifting port controller 1 3 c' valves 1 3 and d ⁇ 1 3 made of e H 2 feed lines, H 2 and N 2 gas mixer is formed from 1 4 which, in the present embodiment, by mixing the N 2 and H 2 in the gas mixer 4, and the H 2 0. l V o 1 % N 2 containing The mixed gas G of H 2 is supplied to the hydrogen radical generator / sprayer 11 at a flow rate of about 30 S LM.
- the hydrogen radical generator C is a hydrogen radical generator / sprayer 11 provided at the downstream end of the mixed gas supply pipe A.
- the nod generator C may have any configuration as long as it has a platinum coating film in the gas contact portion of the mixed gas G.
- the installation location of the hydrogen radical generator C may be any location as long as it is downstream of the mixed gas heating device B.
- those of the flow 50 S LM to the lifting opening meter 12 c for N 2 is also intended flow rate 100 SCCM in the lifting slot meter H 2, they are respectively used.
- SLM and S CCM indicate flow rates expressed in 1 / min and cc / min under standard conditions.
- the mixing ratio of H 2 in the mixed gas G is set to about 0.1Vo 1%.
- the mixing ratio of the force H 2 is desirably selected between 0.01 to 5.0 Vo 1%. This is because even if the H 2 mixture ratio is set to 5.0% or more, the so-called hydrogen termination level of Si does not improve because it is saturated, and the amount of H 2 loss only increases. Conversely, if the mixing ratio of H 2 is set to 0.01% or less, the degree of hydrogen termination of Si decreases, and it becomes difficult to perform complete hydrogen termination of Si, This is because too much is applied.
- the mixed gas G having a flow rate of 30 SML is applied for 2 to 3 minutes to the hydrogen radical generation / spraying device 11 for drying the wafer 4 having an outer diameter of about 54 mm ⁇ .
- the outer diameter of the wafer 4 to be processed is not limited to that of the embodiment, and the outer diameter of the wafer 4 to be cleaned, the drying time, The flow rate of the supplied mixed gas G is appropriately adjusted according to the temperature of the mixed gas.
- a flexible tube made of stainless steel having an outer diameter of 6.35 mm ⁇ and having an inner surface electrolytically polished is used as the flexible connection pipe 6. As shown in FIG. It is detachably mounted between the outlet side of the pipe and the lower end of the vertical connecting pipe 7.
- a stainless steel pipe having an inner diameter of 6.35 mm ⁇ and having an outer diameter of electrolytically polished is used as the vertical connecting pipe 7.
- the stainless steel pipe is disposed in the case main body 1 in a vertical position, and is rotated by the case main body 1. Up and down supported.
- the outer peripheral surface of the lower end portion of the vertical connecting pipe 7 is connected to a lifting / rotating drive device 8 described later.
- the vertical connecting pipe 7 is slid up and down by a certain distance (about 20 O mm in this embodiment) within a predetermined distance by the operation of the lifting / rotating drive device 8, and a predetermined distance. It rotates forward and backward in the circumferential direction within an angle range (about 20 ° in this embodiment).
- a vertical connection pipe 9 with a heater which will be described later, is connected to the upper end of the vertical connection pipe 7, and the connection pipes 7 and 9 form a flow path for the mixed gas G in the vertical direction.
- the elevating / rotating drive device 8 slides the vertical connecting pipe 7 and the vertical connecting pipe 9 with a heater in the upward and downward directions, and sets the axis of the vertical connecting pipe 7 in the circumferential direction at an angle of 0 (this embodiment).
- the vertical connecting pipe 7 is moved up and down by a combination of a motor drive unit and a rack mechanism, and the motor drive is performed.
- the vertical connecting pipe 7 is rotated forward and backward by a predetermined angle ⁇ in the circumferential direction by a combination of the section and the gear mechanism.
- the lifting / rotating drive device 8 may have any structure, and may be an air cylinder type or hydraulic cylinder type lifting / rotating drive device 8.
- the above-mentioned vertical connecting pipe 9 with a heater is formed of a connecting pipe main body 15 and a sheath heater 16 housed in the connecting pipe main body 15 as shown in FIG. 15a, a gas outlet 15b and a lead wire outlet 15c are provided respectively.
- an inner surface having an outer diameter of 19.5 mm and an electrolytically polished stainless steel tube are used as the connecting tube main body 15, and the outer periphery of the sheath heater 16 inserted and fixed in the inside thereof is used.
- a fluid passage is formed between the surface and the inner wall surface of the connection pipe main body 15.
- stainless steel pipes whose inner wall with an outer diameter of 6.35 ⁇ is electropolished are used.
- the sheath heater 16 is formed of a heating portion 16a, a thermocouple 16b, an input lead 16c, a thermocouple lead 16d, and the like.
- a sheath heater 16 is used in which a 200 V, 200 W heating section 6a and the like are attached in a 2 mm ⁇ stainless steel tube.
- the capacity of the sheath heater 16 to be used and the effective cross-sectional area of the flow passage in the connecting pipe main body 15 are as follows: Is appropriately selected according to
- For heating increases the gas mixture) within 5-2 0 seconds to a temperature of 1 0 0 ° C ⁇ 1 5 0 ° C and 9% of N 2, a sheath heater having a 2 0 OW heating unit 1 6 a a Two of 16 are used.
- N 2 forming the mixed gas may be any gas as long as it does not react with hydrogen.
- the gas inlet 15a is provided on the lower outer peripheral surface of the connecting pipe main body 15 of the vertical connecting pipe 9 with a heater, the axis of the vertical connecting pipe 7 and the vertical connecting pipe 9 with the heater are provided. Although the shafts are not straight, the positions of the lead wire outlet 15c and the gas inlet 15a can be switched so that the shafts 7 and 9 can be positioned in a straight line. It is.
- the horizontal connecting pipe with heater 10 is connected to the upper end of the vertical connecting pipe with heater 9 in a horizontal posture, and a hydrogen radical generation / dispersion device 11 to be described later is attached and fixed to a tip end thereof. Note that it is of course possible to provide a heater for heating inside the hydrogen radical generation / sprayer 11.
- FIG. 7 is a schematic cross-sectional view of a horizontal connecting pipe 10 with a heater used in the rotary wafer cleaning apparatus according to the present embodiment.
- the outer pipe 1 has an outer diameter of 19.5 mm mm.
- a stainless steel inner pipe 19 whose inner wall with an outer diameter of 6.35 mm ⁇ is electrolytically polished with a spacer 18 interposed between the inside and the inner pipe 19 is supported and fixed.
- a micro-sheath heater 20 having an outer diameter of 1 mm ( ⁇ >) is wound at an appropriate pitch, and the upper part thereof is covered with an aluminum foil 21.
- a mixed gas G of about 100 ° C. to 120 ° C. and about 30 SLM supplied through the vertical connecting pipe 9 with a heater passes through the inner pipe 19. In the meantime, it is heated to about 200 ° C to 250 ° C by 15 micro-heaters 20 OWX 15 and then supplied from the tip to hydrogen radical generation and sprayer 11 described later. Been going.
- the length of the horizontal connecting pipe with heater 10 is selected to be about 400 to 50 O mm. Further, as shown in FIGS. 3 and 4, the horizontal connecting pipe 10 with the heater is moved upward and downward by about 200 mm and horizontally by about 20 ° by the operation of the rotary drive device 8. Each will move over the range.
- FIGS. 6 and 7 the vertical connecting pipe 9 with a heater is not shown. It is a matter of course that a thermal insulation material (not shown) is provided on the outer peripheral portion of the connecting pipe main body 15 and the outer peripheral portion of the outer pipe 17 of the horizontal connecting pipe 10 with a heater.
- a hydrogen radical generator / sprayer 11 is welded to the end of the horizontal connecting pipe 10 with a heater. Nitrogen gas containing hydrogen radicalized from the hydrogen radical generator / sprayer 11 is provided below the hydrogen radical generator / sprayer 11. It is ejected toward the outer surface of the silicon wafer 4 located at the position.
- the hydrogen radical generation / sprayer 11 includes an upper body 23 made of stainless steel having an inverted dish shape, and a cylindrical filter flange formed on a lower edge of the upper body 23.
- the disk-shaped reflector plate 25 is welded together with the upper end of the filter 24, and a disk-shaped platinum-coated filter 26 fixed to the lower end of the filter flange 24. That is, in the center of the upper wall surface of the upper body 23 having the inverted dish shape, a mixed gas introduction hole 2 is provided.
- a mixed gas G heated to about 150 ° C. to 250 ° C. is introduced into the upper main body 23 through the introduction hole 23 a.
- the disc-shaped reflecting plate 25 is formed of stainless steel, and a plurality of gas permeable holes 25a are formed in an outer peripheral portion thereof.
- the outer peripheral edge of the reflection plate 25 is welded to the upper main body 23 while being sandwiched between the upper end surface of the short cylindrical filter flange 24 and the lower end surface of the upper main body 23. I have.
- the platinum-coated filter 26 is formed by coating the outer surface of a stainless steel filter material with platinum.
- a stainless steel wire having an outer diameter of 1 ⁇ is used.
- An approximately 8 mesh mesh consisting of layers is laminated and sintered to form a disk-shaped filter material with a thickness of about 2-3 mm, an outer diameter of about 60 mm, and an average pore size of 20 / zm.
- a platinum layer having a thickness of about 0.3 / zm is formed on one outer surface of the pores of the filter material by a vapor deposition method.
- the method of forming a platinum coating layer on a stainless steel filter material is not limited to the above-described vapor deposition method, and any method that can directly form a platinum layer on the outer surface of stainless steel may be formed by an ion plating method. Of course, other methods may be used.
- a sintered material is used for the stainless steel filter material, the average pore size is set to 20 / m, the thickness is set to about 2 to 3 mm, and the platinum layer thickness is set to about 0.
- the method of forming the filter material, its thickness, external dimensions, average pore size, thickness of the platinum layer, etc. are not limited to the numerical values in the present embodiment. Instead, it is appropriately selected according to the flow rate of the mixed gas G to be jetted, the jetting time, the external dimensions of the silicon wafer 4, and the like.
- the platinum-coated filter 26 of the hydrogen radical generation / sprayer 11 is held and fixed by a screwing mechanism in a horizontal state at the lower end of the short cylindrical filter flange 24.
- the lower surface side of the platinum coating filter 26 is set on the wafer supporting disk 3a by lowering the spraying device 11 to the home position through the elevating / rotating drive device 8.
- the wafer 4 is lowered to a position near the outer surface of the wafer 4.
- the activity of hydrogen radicals formed by the catalytic action of platinum which will be described later, is maintained. It is set to about 0.5 to 1.5 mm from the viewpoint of properties and the like.
- the wafer 4 to be cleaned is first automatically fixed on the support disk 3 a of the wafer cleaning device, and the wafer support / rotation drive device 3 is operated.
- the wafer 4 is rotated at a high speed (about 2000 to 2500 RPM).
- a so-called pickling is performed by spraying a chemical cleaning agent such as hydrofluoric acid onto the wafer 4 rotating at a high speed.
- the pure water cleaning is performed by injecting pure water to the outer surface of the wafer 4.
- a mixed gas G of N 2 and N 2 is supplied to the vertical connection pipe 7 at a flow rate of 30 S LM. Before the supply of the mixed gas G is started, it is desirable that the hydrogen radical generation / sprayer 11 has been moved to the operating position.
- the mixed gas G supplied to the vertical connecting pipe 7 is heated by the sheath heater 16 while passing through the vertical connecting pipe 9 with a heater, and is heated to about 80 ° C to 150 ° C. .
- the mixed gas G heated in the vertical connecting pipe 9 is further heated while passing through the horizontal connecting pipe 10 with a heater, and reaches a temperature of about 150 ° C to 300 ° C. Hydrogen radicals are generated and introduced into the sprayer.
- hydrogen radical generation through mixed gas inlet 23 a The mixed gas ejected into upper body 23 of sprayer 11 collides with reflector 25 and is diffused. is introduced through the gas passage holes 2 5 a top surface side of the platinum coated filter 2 6, after the inside of the hydrogen gas is converted to hydrogen radicals by the catalytic action of platinum while passing through the filter 2 6, the wafer with N 2 4 It is squirted up.
- the mixed gas G ejected upward from the filter 26 is heated to a high temperature of 150 ° C. to 300 ° C. (about 250 ° C. in the present embodiment).
- the mixed gas G mainly composed of N 2 containing hydrogen radicals is jetted from the lower surface of the filter 26 onto the wafer 4 rotating at a high speed, so that the hydrogen atoms are closely packed with the Si atoms exposed by the pure water cleaning.
- Si atoms are easily bonded, and Si atoms on the outer surface of the wafer are completely hydrogen-terminated without unevenness.
- the radicalization of the hydrogen in the mixed gas G by the platinum catalyst is sufficient if the mixed gas temperature is 150 ° C. or higher.In this embodiment, the mixed gas temperature is set to 250 ° C. in consideration of a margin. Up to.
- the critical temperature for hydrogen radical formation is about 150 ° C.
- water is generated by the reaction between hydrogen radicalized by a platinum catalyst and oxygen as shown in FIG. It is also evident from the relationship curve between the reaction rate and the temperature.When the temperature exceeds about 150 ° C, the reaction rate is about 100%. It turns out that most are radicalized.
- the distance between the hydrogen radical generator / sprayer 11 and the wafer 4 is set to about lmm, but the smaller the distance, the more desirable. If the distance exceeds about 3 mm, hydrogen radicals will disappear between the outer surface of the filter 26 and the outer surface of the wafer 4, resulting in insufficient hydrogen termination.
- the interval is set to 1 mm.
- the mixed gas G at 250 ° C. and 30 S LM is continuously supplied for 2 minutes. This allows the 3111 wafer of 60111111 rotated at 2000 RPM to be completely dried and the Si atoms on its outer surface to be almost completely hydrogen terminated.
- the Si wafer 4 with an outer diameter of 6 Omm ⁇ is washed with hydrofluoric acid and pure water, and the Si wafer 4 with the Si surface completely exposed is rotated at 2000 RPM to contain 0.1% H 2 Hydrogen radicals are generated at a flow rate of 30 S LM by supplying a mixed gas of H 2 and N 2 to the sprayer 11, and the mixed gas G is continuously supplied for 2 minutes, with the distance between the filter 26 and the Si wafer 4 being 1 mm. Erupted.
- the finoleta 26 is a disk made of a sintered body of a stainless steel wire mesh with an outer diameter of 54 ⁇ , a thickness of 2.5mm, an average pore size of 2 Oim, and an inlet of the filter 26.
- the temperature of the mixed gas at 250 ° C is 250 ° C.
- the silicon wafer drying apparatus 1 of the above embodiment When the wafer 4 dried and hydrogen-terminated by the silicon wafer drying apparatus 1 of the above embodiment is placed in a clean atmosphere and naturally oxidized, even when about 48 hours have passed, the silicon wafer is No noticeable change in appearance, such as discoloration, occurred on the outer surface.
- Si i was subjected to the same pre-cleaning treatment with hydrofluoric acid and pure water.
- the wafer 4 was rotated at 2000 RPM, and 250 ° (3 1 ⁇ 2 gas was used at a rate of 3 OS LM at a rate of 3 OS LM using a sprayer equipped with the same filter without platinum coating. It was continuously sprayed onto the outer surface of i-wafer 4 for 2 minutes.
- the Si atomic force on the outer surface of the Si wafer was highly hydrogen-terminated.
- the outer surface of the cleaned silicon wafer can be maintained in a stable state for a long period of time.
- the degree of hydrogen termination on the outer surface of silicon is generally determined by observing the peak of infrared absorption (near 220 cm- 1 ) of Si_H by the so-called FT-IR (ATR method). It has been determined that.
- FIG. 9 shows the infrared absorption of S i _H of the silicon wafer immediately after the cleaning and drying treatment by the method described in the above embodiment using the rotary silicon wafer cleaning apparatus according to the present invention. This shows the results measured by the ATR method.
- a hydrogen radical generator C provided with a platinum coating film in the gas contact portion, a mixed gas heating device B, a mixed gas supply pipe A and A silicon wafer drying device consisting of a gas supply panel and the like is provided, and a mixed gas of hydrogen and an inert gas heated to a temperature of 150 ° C. or more is jetted through the hydrogen radical generator C so that the inside of the mixed gas is
- the hydrogen is converted into hydrogen radicals by the catalytic action of the platinum coating film, and the wafer is dried by injecting a mixed gas containing the hydrogen radicals onto the wafer.
- Si atoms on the outer surface of the silicon wafer where Si was exposed by pure water cleaning Will be more completely bonded to H atoms, and can perform advanced hydrogen termination.
- the outer surface of the Si wafer is kept in a stable state for a long time.
- the present invention has excellent practical utility as described above.
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020047011263A KR100705344B1 (ko) | 2002-09-24 | 2003-09-11 | 회전식 실리콘웨이퍼 세정장치 |
EP03808884A EP1544902A1 (en) | 2002-09-24 | 2003-09-11 | Rotary silicon wafer cleaning apparatus |
AU2003264411A AU2003264411A1 (en) | 2002-09-24 | 2003-09-11 | Rotary silicon wafer cleaning apparatus |
IL16179303A IL161793A0 (en) | 2002-09-24 | 2003-09-11 | Rotation type silicon wafer cleaning equipment |
CA002465875A CA2465875A1 (en) | 2002-09-24 | 2003-09-11 | Rotary silicon wafer cleaning apparatus |
US10/498,800 US7103990B2 (en) | 2002-09-24 | 2003-09-11 | Rotary silicon wafer cleaning apparatus |
IL161793A IL161793A (en) | 2002-09-24 | 2004-05-05 | Rotation type silicon wafer cleaning equipment |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2002-276818 | 2002-09-24 | ||
JP2002276818A JP4554146B2 (ja) | 2002-09-24 | 2002-09-24 | 回転式シリコンウエハ洗浄装置 |
Publications (1)
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WO2004036637A1 true WO2004036637A1 (ja) | 2004-04-29 |
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PCT/JP2003/011667 WO2004036637A1 (ja) | 2002-09-24 | 2003-09-11 | 回転式シリコンウエハ洗浄装置 |
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US (1) | US7103990B2 (ja) |
EP (1) | EP1544902A1 (ja) |
JP (1) | JP4554146B2 (ja) |
KR (1) | KR100705344B1 (ja) |
CN (1) | CN100359641C (ja) |
AU (1) | AU2003264411A1 (ja) |
CA (1) | CA2465875A1 (ja) |
IL (2) | IL161793A0 (ja) |
TW (1) | TWI226661B (ja) |
WO (1) | WO2004036637A1 (ja) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW200524018A (en) * | 2003-11-20 | 2005-07-16 | Ulvac Inc | Method of cleaning surface of semiconductor substrate, method of manufacturing film, method of manufacturing semiconductor device and semiconductor device |
US10179351B2 (en) | 2005-02-07 | 2019-01-15 | Planar Semiconductor, Inc. | Method and apparatus for cleaning flat objects with pulsed liquid jet |
US9799536B2 (en) * | 2005-02-07 | 2017-10-24 | Planar Semiconductor, Inc. | Apparatus and method for cleaning flat objects in a vertical orientation with pulsed liquid jet |
TWI552797B (zh) * | 2005-06-22 | 2016-10-11 | 恩特葛瑞斯股份有限公司 | 整合式氣體混合用之裝置及方法 |
US7479460B2 (en) * | 2005-08-23 | 2009-01-20 | Asm America, Inc. | Silicon surface preparation |
CN101263589B (zh) * | 2005-09-13 | 2010-08-25 | 大见忠弘 | 半导体装置的制造方法及半导体制造装置 |
US7877895B2 (en) * | 2006-06-26 | 2011-02-01 | Tokyo Electron Limited | Substrate processing apparatus |
US7694688B2 (en) | 2007-01-05 | 2010-04-13 | Applied Materials, Inc. | Wet clean system design |
US20080166210A1 (en) * | 2007-01-05 | 2008-07-10 | Applied Materials, Inc. | Supinating cartesian robot blade |
CN101179009B (zh) * | 2007-11-21 | 2011-09-21 | 上海宏力半导体制造有限公司 | 喷射清洗方法以及装置 |
CN101740324B (zh) * | 2008-11-25 | 2011-09-28 | 上海华虹Nec电子有限公司 | 硅片清洗机及硅片清洗方法 |
US9454158B2 (en) | 2013-03-15 | 2016-09-27 | Bhushan Somani | Real time diagnostics for flow controller systems and methods |
CN104096667A (zh) * | 2013-04-08 | 2014-10-15 | 广达电脑股份有限公司 | 烘胶设备 |
US10983537B2 (en) | 2017-02-27 | 2021-04-20 | Flow Devices And Systems Inc. | Systems and methods for flow sensor back pressure adjustment for mass flow controller |
KR102003361B1 (ko) * | 2017-09-19 | 2019-07-24 | 무진전자 주식회사 | 인시튜 건식 세정 방법 및 장치 |
KR101981738B1 (ko) * | 2017-09-19 | 2019-05-27 | 무진전자 주식회사 | 기판 처리 방법 및 장치 |
CN110148573B (zh) * | 2019-04-17 | 2020-12-04 | 湖州达立智能设备制造有限公司 | 一种半导体设备工艺腔的晶圆升降装置 |
CN110335839B (zh) * | 2019-07-05 | 2022-02-22 | 西安奕斯伟材料科技有限公司 | 一种片盒清洗装置及方法 |
CN111354662A (zh) * | 2020-03-10 | 2020-06-30 | 南通欧贝黎新能源电力股份有限公司 | 一种太阳能电池片制备用硅片去除磷硅玻璃酸洗装置 |
CN114001546B (zh) * | 2021-11-01 | 2022-09-30 | 华海清科股份有限公司 | 一种晶圆提拉干燥的动态交接方法及晶圆干燥装置 |
Citations (2)
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EP0714120A1 (en) * | 1993-08-09 | 1996-05-29 | OHMI, Tadahiro | Method and apparatus for wafer washing |
JP2000031109A (ja) * | 1998-07-08 | 2000-01-28 | Tadahiro Omi | 乾燥方法 |
Family Cites Families (3)
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---|---|---|---|---|
US5212050A (en) * | 1988-11-14 | 1993-05-18 | Mier Randall M | Method of forming a permselective layer |
US5129955A (en) * | 1989-01-11 | 1992-07-14 | Dainippon Screen Mfg. Co., Ltd. | Wafer cleaning method |
JP3742451B2 (ja) * | 1996-01-17 | 2006-02-01 | 昌之 都田 | 洗浄方法 |
-
2002
- 2002-09-24 JP JP2002276818A patent/JP4554146B2/ja not_active Expired - Fee Related
-
2003
- 2003-09-11 US US10/498,800 patent/US7103990B2/en not_active Expired - Fee Related
- 2003-09-11 KR KR1020047011263A patent/KR100705344B1/ko not_active IP Right Cessation
- 2003-09-11 CA CA002465875A patent/CA2465875A1/en not_active Abandoned
- 2003-09-11 AU AU2003264411A patent/AU2003264411A1/en not_active Abandoned
- 2003-09-11 EP EP03808884A patent/EP1544902A1/en not_active Withdrawn
- 2003-09-11 IL IL16179303A patent/IL161793A0/xx unknown
- 2003-09-11 CN CNB03801601XA patent/CN100359641C/zh not_active Expired - Fee Related
- 2003-09-11 WO PCT/JP2003/011667 patent/WO2004036637A1/ja active Application Filing
- 2003-09-19 TW TW092125997A patent/TWI226661B/zh not_active IP Right Cessation
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2004
- 2004-05-05 IL IL161793A patent/IL161793A/en not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0714120A1 (en) * | 1993-08-09 | 1996-05-29 | OHMI, Tadahiro | Method and apparatus for wafer washing |
JP2000031109A (ja) * | 1998-07-08 | 2000-01-28 | Tadahiro Omi | 乾燥方法 |
Also Published As
Publication number | Publication date |
---|---|
US7103990B2 (en) | 2006-09-12 |
CN100359641C (zh) | 2008-01-02 |
EP1544902A1 (en) | 2005-06-22 |
IL161793A (en) | 2008-12-29 |
IL161793A0 (en) | 2005-11-20 |
TWI226661B (en) | 2005-01-11 |
KR20040089117A (ko) | 2004-10-20 |
KR100705344B1 (ko) | 2007-04-10 |
AU2003264411A8 (en) | 2004-05-04 |
TW200409218A (en) | 2004-06-01 |
US20050126030A1 (en) | 2005-06-16 |
CA2465875A1 (en) | 2004-04-29 |
JP2004119417A (ja) | 2004-04-15 |
JP4554146B2 (ja) | 2010-09-29 |
AU2003264411A1 (en) | 2004-05-04 |
CN1596461A (zh) | 2005-03-16 |
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