Patent ID: 6523935
Filing Date: 2003-02-25
Classification: B41J

Abstract:
An ink jet printhead, comprising:a printhead substrate including a plurality of thin film layers; four side by side columnar arrays of drop generators formed in said printhead substrate and extending along a longitudinal extent; each columnar array of drop generators having at least 100 drop generators separated by a drop generator pitch P; said four columnar arrays of drop generators comprising a first columnar array and a second columnar array separated from each other by at most 630 micrometers, and a third columnar array and a fourth columnar array separated from each other by at most 630 micrometers; said drop generators producing ink drops of a same predetermined color and having a drop volume that enables single pass monochrome printing of a resolution that is 1/(4P) dpi along a print axis parallel to said longitudinal extent; and four columnar arrays of FET drive circuits formed in said printhead substrate respectively adjacent said columnar arrays of drop generators for energizing said columnar arrays of drop generators.