Patent ID: 6764163
Filing Date: 2004-07-20
Classification: B41J

Abstract:
A heater chip, comprising:a substrate having a plurality of thin film layers arranged thereon; two outer ink vias and one inner ink via adjacently arranged in the substrate each having a first and second longitudinal side; and a plurality of heaters formed by the thin film layers grouped together in at least six rows wherein a first two rows of the six rows are arranged adjacent to the first longitudinal side of one of the two outer ink vias, a second two rows of the six rows are arranged adjacent to one of the first and second longitudinal sides of the inner via, and a third two rows of the six rows are arranged adjacent to the second longitudinal side of the other of the two outer ink vias, each of the first, second, and third two rows having one row of near heaters and one row of far heaters with the one row of near heaters being closer in distance to the ink via than the one row of far heaters, wherein each one row of near heaters and far heaters contains five groupings of sixteen heaters.