Substrate for ink jet head with TaCr alloy protective layer,...

Details Substrate for ink jet head with TaCr alloy protective layer,... Substrate for ink jet head with TaCr alloy protective layer,...

Filed on

2008-07-01

Date issued

2008-07-01

Examiner

Stephens, Juanita D (Department: 2853)

Patent Class

Incremental printing of symbolic information

SubClass

Ink jet

SubSubClass

Ejector mechanism

Other Related Categories

C347S064000

Type

Reexamination Certificate

Status

active

Patent number

10534906

Description

ABSTRACT:
For improving adhesion between a protective layer having a portion coming into contact with ink in a substrate for an ink jet head, and a resin layer thereby ensuring reliability in quality over a prolonged period, the invention provides a substrate for an ink jet head including a heat-generating resistor constituting a heat generating portion, an electrode wiring electrically connected with the heat-generating resistor and an upper protective layer provided on the heat-generating resistor and the electrode wiring across an insulating protective layer, wherein after forming an upper protective layer in which a Ta layer is laminated on a layer formed by a TaCr alloy, said Ta layer is selectively patterned and selectively removed so that the liquid flow path member is formed in a portion where the layer formed by said TaCr alloy is exposed by said removing.

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