Patent ID: 6412917
Filing Date: 2002-07-02
Classification: B41J

Abstract:
An ink jet printhead comprising:a printhead substrate including a plurality of thin film layers; a columnar array of drop generators defined in said printhead substrate and extending along a longitudinal axis L; each drop generator having a heater resistor having a resistance of at least 100 ohms; a columnar array of FET circuits formed in said printhead substrate and respectively connected to said drop generators, said FET circuits including active regions each comprised of drain regions, source regions, and a gate disposed on a gate oxide layer, each FET circuit having an on-resistance that is less than (250,000 ohmÂ·micrometers2)/A, wherein A is an area of such FET circuit in micrometers2; power traces connected to said drop generators and said FET drive circuits; and said FET drive circuits configured to compensate for a variation in a parasitic resistance presented by said power traces.