Proposed is dispensing technology capable of reliably spotting a biological sample on a solid phase. A head chip applies a voltage pulse between a diaphragm and separate electrodes based on a drive control signal output from a head driver IC, and discharges a solution containing protein filled in a pressurized...http://www.google.ca/patents/US7396511?utm_source=gb-gplus-sharePatent US7396511 - Dispensing device, dispensing method and method of detecting defective discharge of solution containing biological sample
