Patent US5479197A successfully refreshed from Google Patents.
US5479197A
Expired / Lapsed
US
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Head for recording apparatus
Assignee: Canon Inc
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Filing: 1995-04-06
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Granted: 1995-12-26
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Expires: 2015-04-06
Abstract
Abstract A head for an ink jet recording apparatus including: an electro-thermal transducer for generating thermal energy for use to discharge ink; and a circuit portion electrically connected to the electro-thermal transducer, wherein the circuit portion has a first conductive layer, an insulating layer disposed on the first conductive layer, and a second conductive layer disposed on the insulating layer, and an opening portion of the insulating layer is filled with a conductor formed by a selective deposition method so that the first conductive layer and the second conductive layer are connected to each other.
Inventors
- 👤 Takashi Fujikawa
- 👤 Asao Saito
- 👤 Makoto Shibata
- 👤 Junichi Kobayashi
- 👤 Hirokazu Komuro
- 👤 Isao Kimura
- 👤 Kenji Hasegawa
- 👤 Teruo Ozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:26
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/16; B41J2/1601; B41J2/1604; B41J2/14; B41J2/14016; B41J2/14072; B41J2/14088; B41J2/14112; B41J2/14129; B41J2/1621; B41J2/1623; B41J2/1626; B41J2/1628; B41J2/1631; B41J2/1632; B41J2/164; B41J2/1642; B41J2/1646; B41J2202/00; B41J2202/01; B41J2202/13
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
144 words
A head for an ink jet recording apparatus comprising: an electro-thermal transducer for generating thermal energy to discharge an ink; and a wiring portion electrically connected to said electro-thermal transducer, wherein said wiring portion has a heat-generating resistance layer formed on a substrate, a pair of conductive layers formed on said heat-generating resistance layer, and an insulating layer formed on said pair of conductive layers, an opening portion formed in said insulating layer, and a conductor formed in said opening portion, wherein said substrate includes a common semiconductor body, and a plurality of semiconductor regions including at least a p region and an n region with PN junctions formed between said p region and said n region, and said pair of said conductive layers are in contact with said semiconductor region, said PN junctions serving to confine a current flowing along said conductive layers.
Claim 2
Dependent Claim
144 words
A head for an ink jet recording apparatus comprising: an electro-thermal transducer for generating thermal energy to discharge an ink; and a wiring portion electrically connected to said electro-thermal transducer, wherein said wiring portion has a heat-generating resistance layer formed on a substrate, a pair of conductive layers formed on said heat-generating resistance layer, and an insulating layer formed on said pair of conductive layers, an opening portion formed in said insulating layer, and a conductor formed in said opening portion, wherein said substrate includes a common semiconductor body, and a plurality of semiconductor regions including at least a p region and an n region with PN junctions formed between said p region and said n region, and said pair of said conductive layers are in contact with said semiconductor region, said PN junctions serving to confine a current flowing along said conductive layers.
Claim 3
Dependent Claim
25 words
A head for an ink jet recording apparatus according to claim 1, wherein said insulating layer is a protection layer for protecting said electro-thermal transducer.
Claim 4
Dependent Claim
21 words
A head for an ink jet recording apparatus according to claim 1, wherein said conductor is metal mainly composed of aluminum.
Claim 5
Dependent Claim
34 words
A head for an ink jet recording apparatus according to claim 1, wherein said head has an ink chamber for accommodating ink, and a plurality of ink discharge ports communicated with said ink chamber.
Claim 6
Dependent Claim
32 words
A head for an ink jet recording apparatus according to claim 1, wherein said head discharges said ink in a direction substantially parallel to a heat generating surface of said electro-thermal transducer.
Claim 7
Dependent Claim
31 words
A head for an ink recording apparatus according to claim 1, wherein said head discharges said ink in a direction substantially perpendicular to a heat generating surface of said electro-thermal transducer.
Claim 8
Dependent Claim
23 words
A head for an ink jet recording apparatus according to claim 1, wherein said head has an ink chamber and ink stored therein.
Claim 9
Dependent Claim
23 words
An ink jet recording apparatus comprising a head according to claim 1 and means for holding a recording medium at a recording position.
Claim 10
Dependent Claim
116 words
A head for an ink jet recording apparatus comprising: an electro-thermal transducer for generating thermal energy to discharge an ink, said transducer having two sides; a wiring portion electrically connected to said electro-thermal transducer; a plurality of elongated metallic members each comprising aluminum; and a first protection layer and a second protection layer, said first protection layer and said second protection layer having been formed above said electro-thermal transducer, wherein said metallic members are connected to said first protection layer through an opening in said second protection layer, securing said first protection layer to a substrate, and to said second protection layer, and said members are disposed along both of the sides of said electro-thermal transducer.
Claim 11
Dependent Claim
116 words
A head for an ink jet recording apparatus comprising: an electro-thermal transducer for generating thermal energy to discharge an ink, said transducer having two sides; a wiring portion electrically connected to said electro-thermal transducer; a plurality of elongated metallic members each comprising aluminum; and a first protection layer and a second protection layer, said first protection layer and said second protection layer having been formed above said electro-thermal transducer, wherein said metallic members are connected to said first protection layer through an opening in said second protection layer, securing said first protection layer to a substrate, and to said second protection layer, and said members are disposed along both of the sides of said electro-thermal transducer.
Claim 12
Dependent Claim
25 words
A head for an ink jet recording apparatus according to claim 9, wherein said second protection layer is positioned so as to contact the ink.
Claim 13
Dependent Claim
21 words
A head for an ink jet recording apparatus according to claim 9, wherein said member is metal mainly composed of aluminum.
Claim 14
Dependent Claim
34 words
A head for an ink jet recording apparatus according to claim 9, wherein said head has an ink chamber for accommodating ink, and a plurality of ink discharge ports communicated with said ink chamber.
Claim 15
Dependent Claim
32 words
A head for an ink jet recording apparatus according to claim 9, wherein said head discharges said ink in a direction substantially parallel to a heat generating surface of said electro-thermal transducer.
Claim 16
Dependent Claim
32 words
A head for an ink jet recording apparatus according to claim 9, wherein said head discharges said ink in a direction substantially perpendicular to a heat generating surface of said electro-thermal transducer.
Claim 17
Dependent Claim
23 words
A head for an ink jet recording apparatus according to claim 9, wherein said head has an ink chamber and ink stored therein.
Claim 18
Dependent Claim
23 words
An ink let recording apparatus comprising a head according to claim 9 and means for holding a recording medium at a recording position.
Claim 19
Dependent Claim
130 words
A head for an ink jet recording apparatus comprising: a substrate having an insulating surface and a pair of recesses formed therein, said substrate including a common semiconductor body and a pair of semiconductor regions including at least a p region and an n region with PN junctions formed between said p region and said n region; a pair of substantially flat conductors with respect to said surface and respectively embedded in said pair of recesses; and a heat-generating resistance layer for generating thermal energy to discharge an ink formed on said pair of said conductors and a portion of said insulating surface, and electrically connected to said pair of said conductors, wherein said pair of said conductors contact said semiconductor regions, and wherein said PN junctions are reverse biased.
Claim 20
Dependent Claim
130 words
A head for an ink jet recording apparatus comprising: a substrate having an insulating surface and a pair of recesses formed therein, said substrate including a common semiconductor body and a pair of semiconductor regions including at least a p region and an n region with PN junctions formed between said p region and said n region; a pair of substantially flat conductors with respect to said surface and respectively embedded in said pair of recesses; and a heat-generating resistance layer for generating thermal energy to discharge an ink formed on said pair of said conductors and a portion of said insulating surface, and electrically connected to said pair of said conductors, wherein said pair of said conductors contact said semiconductor regions, and wherein said PN junctions are reverse biased.
Claim 21
Dependent Claim
23 words
A head for an ink jet recording apparatus according to claim 17, wherein a protection layer is formed on said heat-generating resistance layer.
Claim 22
Dependent Claim
21 words
A head for an ink jet recording apparatus according to claim 17, wherein said conductor is metal mainly composed of aluminum.
Claim 23
Dependent Claim
34 words
A head for an ink jet recording apparatus according to claim 17, wherein said head has an ink chamber for accommodating ink, and a plurality of ink discharge ports communicated with said ink chamber.
Claim 24
Dependent Claim
32 words
A head for an ink jet recording apparatus according to claim 17, wherein said head discharges said ink in a direction substantially parallel to a heat generating surface of said electro-thermal transducer.
Claim 25
Dependent Claim
32 words
A head for an ink jet recording apparatus according to claim 17, wherein said head discharges said ink in a direction substantially perpendicular to a heat generating surface of said electro-thermal transducer.
Claim 26
Dependent Claim
23 words
A head for an ink jet recording apparatus according to claim 17, wherein said head has an ink chamber and ink stored therein.
Claim 27
Dependent Claim
23 words
An ink jet recording apparatus comprising a head according to claim 17 and means for holding a recording medium at a recording position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-25 | 1999-06-26 | 1999-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-25 | 2003-06-26 | 2003-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-25 | 2007-06-26 | 2007-12-26 | $7700.00 | Window Closed / Lapsed |