Ink jet recording head and production process thereof

Details Ink jet recording head and production process thereof Ink jet recording head and production process thereof

2008-04-30

2011-12-06

Rahll, Jerry (Department: 2874)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S022000, C347S027000

Reexamination Certificate

active

08070267

ABSTRACT:
An ink jet recording element substrate includes a substrate; an ejection outlet array for ejecting ink; a heat generating element array comprising a plurality of heat generating elements for generating ejection energy for ejecting the ink from the ejection outlet array; a protecting film, comprising protecting portions, for protecting the heat generating element array; a common line, disposed along a side of the heat generating element array, for supplying electric power for driving the heat generating elements, and being divided into at least two portions by a line perpendicular to the heat generating element array; a testing electrode for testing a function of the protecting film; and an externally connecting electrode, disposed at an end of the substrate, for externally supplying electric power to the common line; wherein the ink jet recording element substrate further includes, in an area between the portions of the common line, a connecting line for electrically connecting the protecting portions of the protecting film disposed to sandwich the common line and a lead line for electrically connecting the protective film and the testing electrode.

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