US4663640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording head
Assignee: Canon Inc
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Filing: 1985-07-16
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Granted: 1987-05-05
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Expires: 2005-07-16
Abstract
Abstract A recording head comprises at least a substrate, a lower layer provided on said substrate, a heat-generating resistance layer provided on said lower layer and at least a pair of opposed electrodes connected electrically to said heat-generating resistance layer, and said lower layer is constituted of a layer comprising carbon thin film having a diamond matrix structure or comprising carbon fine crystals having a diamond matrix structure. The recording head can be used as a liquid jet recording head.
Inventors
- 👤 Masami Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:40
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/16; B41J2/1621; B41J2/164; B41J2/1642; B41J2/14; B41J2/14016; B41J2/14088; B41J2/14112; B41J2/14129; B41J2/1601; B41J2/1604; B41J2/1623; B41J2/1626; B41J2/1629; B41J2/1631; B41J2/1645; B41J2/1646
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
64 words
A recording head which comprises at least a substrate, a lower layer provided on said substrate, a heat-generating resistance layer provided on said lower layer and at least a pair of opposed electrodes connected electrically to said heat-generating resistance layer, wherein said lower layer is a layer containing a thin carbon film having a diamond structure or fine carbon crystals having a diamond structure.
Claim 2
Dependent Claim
64 words
A recording head which comprises at least a substrate, a lower layer provided on said substrate, a heat-generating resistance layer provided on said lower layer and at least a pair of opposed electrodes connected electrically to said heat-generating resistance layer, wherein said lower layer is a layer containing a thin carbon film having a diamond structure or fine carbon crystals having a diamond structure.
Claim 3
Dependent Claim
20 words
A recording head according to claim 1, wherein said lower layer contains 90 atomic % or more of carbon atoms.
Claim 4
Dependent Claim
22 words
A recording head according to claim 1, wherein said substrate is selected from the group consisting of silicon, ceramics, glass and metal.
Claim 5
Dependent Claim
20 words
A recording head according to claim 1, wherein said lower layer has a thickness of 1 μm to 50 μm.
Claim 6
Dependent Claim
15 words
A recording head according to claim 1, wherein said recording head has a protective layer.
Claim 7
Dependent Claim
19 words
A recording head according to claim 5, wherein said protective layer comprises a carbon film having a diamond structure.
Claim 8
Dependent Claim
26 words
A recording head according to claim 1, wherein said lower layer is provided on said substrate between the said at least one pair of opposed electrodes.
Claim 9
Dependent Claim
106 words
A liquid jet recording head which comprises a liquid discharging section having an orifice for discharging liquid to form flying droplets and a heat acting section where heat energy for formation of said droplets acts on the liquid, and an electrothermal transducer having a lower layer provided on a substrate, a heat-generating resistance layer provided on said lower layer and at least one pair of opposed electrodes connected electrically to the heat-generating resistance layer to form a heat-generating section between these electrodes, wherein said lower layer is a layer containing a thin carbon film having a diamond structure of fine carbon crystals having a diamond structure.
Claim 10
Dependent Claim
106 words
A liquid jet recording head which comprises a liquid discharging section having an orifice for discharging liquid to form flying droplets and a heat acting section where heat energy for formation of said droplets acts on the liquid, and an electrothermal transducer having a lower layer provided on a substrate, a heat-generating resistance layer provided on said lower layer and at least one pair of opposed electrodes connected electrically to the heat-generating resistance layer to form a heat-generating section between these electrodes, wherein said lower layer is a layer containing a thin carbon film having a diamond structure of fine carbon crystals having a diamond structure.
Claim 11
Dependent Claim
22 words
A liquid jet recording head according to claim 8, wherein said lower layer contains 90 atomic % or more of carbon atoms.
Claim 12
Dependent Claim
24 words
A liquid jet recording head according to claim 8, wherein said substrate is selected from a group consisting of silicon, glass, ceramics and metal.
Claim 13
Dependent Claim
22 words
A liquid jet recording head according to claim 8, wherein said lower layer has a thickness of 1 μm to 20 μm.
Claim 14
Dependent Claim
17 words
A liquid jet recording head according to claim 8, wherein said electrothermal transducer has an upper layer.
Claim 15
Dependent Claim
17 words
A liquid jet recording head according to claim 12, wherein said upper layer consists of two layers.
Claim 16
Dependent Claim
17 words
A liquid jet recording head according to claim 12, wherein said upper layer comprises an insulating material.
Claim 17
Dependent Claim
17 words
A liquid jet recording head according to claim 14, wherein said insulating material comprises an inorganic material.
Claim 18
Dependent Claim
21 words
A liquid jet recording head according to claim 8, wherein said lower layer is provided at least in said heat-generating section.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |