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EP0344809A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Liquid emission recording head, substrate therefor and liquid emission recording apparatus utilizing said head

Assignee: Canon Inc
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Filing: 1989-06-02
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Granted: —
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Expires: 2009-06-02
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Abstract

Abstract A substrate for a liquid emission recording head, comprises: a support member (15); plural electrothermal converting elements formed on said support member and each provided with a heat generating resistor layer (3), a common electrode wiring layer (4) and an individual electrode wiring layer (5) both connected to said heat generating resistor layer, and a protective layer (6a) for the above-mentioned layers; an insulating layer (6b) formed on said common electrode wiring layer; and a common electrode (10) connected in common to said plural common electrode wiring layers across said insulating layer by through-holes (9) provided in said insulating layer.

Inventors

  • 👤 Hideo Tamura

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-01 18:05
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/16; B41J2/1621; B41J2/1626; B41J2/1629; B41J2/14; B41J2/14016; B41J2/14088; B41J2/14112; B41J2/14129; B41J2/1601; B41J2/1604; B41J2/1628; B41J2/1631; B41J2/164; B41J2/1646

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 92 words
A substrate for a liquid emission recording head, comprising: a support member; plural electrothermal converting elements formed on said support member and each provided with a heat generating resistor layer, a common electrode wiring layer and an individual electrode wiring layer both connected to said heat generating resistor layer, and a protective layer for the above-mentioned layers; an insulating layer formed on said common electrode wiring layer; and a common electrode connected in common to said plural common electrode wiring layers across said insulating layer by through-holes provided in said insulating layer.
Claim 2
Dependent Claim 92 words
A substrate for a liquid emission recording head, comprising: a support member; plural electrothermal converting elements formed on said support member and each provided with a heat generating resistor layer, a common electrode wiring layer and an individual electrode wiring layer both connected to said heat generating resistor layer, and a protective layer for the above-mentioned layers; an insulating layer formed on said common electrode wiring layer; and a common electrode connected in common to said plural common electrode wiring layers across said insulating layer by through-holes provided in said insulating layer.
Claim 3
Dependent Claim 20 words
A substrate according to claim 1, wherein said protective layer and said insulating layer are composed of a same film.
Claim 4
Dependent Claim 62 words
A liquid emission recording head comprising liquid paths formed, on the substrate according to claim 1, corresponding to heat generating parts formed between said common electrode wiring layers and said individual electrode wiring layers, wherein a discharge opening communicating with each of said liquid paths is adapted to emit liquid by means of the thermal energy generated by said heat generating part.
Claim 5
Dependent Claim 28 words
A liquid emission recording apparatus comprising: a liquid emission recording head according to claim 3; and switch means for power supply for driving said liquid emission recording head.

References Cited (Backward Citations)

GB2119317A Cited
DE3412918A1 Cited

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