An aluminum film for covering an interlayer insulating film is formed by sputtering, and is then subjected to a heat treatment at a temperature lower than its melting point to cause a reflow. Then, an opening is formed in the aluminum film, so that a light shielding film is formed in such a way as to...http://www.google.ca/patents/US5576239?utm_source=gb-gplus-sharePatent US5576239 - Method of manufacturing solid state image sensing device
