US4689638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal recording head and process for manufacturing wiring substrate therefor
Assignee: Fujitsu Ltd
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Filing: 1985-03-18
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Granted: 1987-08-25
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Expires: 2005-03-18
Abstract
Abstract A thermal recording head comprising an insulating substrate which has thereon a heat generating resistor pattern made of a thin-film resistor, an electrode pattern having a common power supply electrode pattern portion and a common grounded electrode pattern portion, for supplying the power to the resistor pattern, and a controlling electrode pattern portion, and switching elements for controlling the supply of the power to the resistor pattern. The electrode pattern is made of a thick-film copper paste by a printing process. The operation of the switching elements is controlled by the controlling electrode pattern portion. Also disclosed is a process for manufacturing a wiring substrate for a thermal recording head.
Inventors
- 👤 Toshio Matsuzaki
- 👤 Haruo Sorimachi
- 👤 Kiyoshi Satoh
- 👤 Takumi Suzuki
- 👤 Takeshi Sugii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:16
CPC Classifications
H; H04; H04N; H04N1/00; B; B41; B41J; B41J2/00; B41J2/315; B41J2/32; B41J2/335; B41J2/33505; B41J2/3351; B41J2/33515; B41J2/33525; B41J2/3353; B41J2/33535; B41J2/33545; B41J2/3355; B41J2/33555; B41J2/3357; B41J2/3359
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
139 words
A thermal recording head comprising an insulating substrate having thereon a heat generating resistor pattern made of a thin-film resistor, a predetermined electrode pattern including a common power supply electrode pattern and a common power grounded electrode pattern portion, for supplying power to the resistor pattern, and a controlling electrode pattern portion, said predetermined electrode pattern being made of a thick-film copper paste by printing, a first insulator layer formed of a thick glass film arranged on said predetermined electrode pattern, a further layer of said thin-film resistor on said first insulatior layer, a second conductor layer formed of a respective thin film on said thin-film resistor, and switching means provided on said second conductor layer for controlling the supply of the power to the resistor pattern, wherein said switching means is controlled by said controlling electrode pattern portion.
Claim 2
Dependent Claim
139 words
A thermal recording head comprising an insulating substrate having thereon a heat generating resistor pattern made of a thin-film resistor, a predetermined electrode pattern including a common power supply electrode pattern and a common power grounded electrode pattern portion, for supplying power to the resistor pattern, and a controlling electrode pattern portion, said predetermined electrode pattern being made of a thick-film copper paste by printing, a first insulator layer formed of a thick glass film arranged on said predetermined electrode pattern, a further layer of said thin-film resistor on said first insulatior layer, a second conductor layer formed of a respective thin film on said thin-film resistor, and switching means provided on said second conductor layer for controlling the supply of the power to the resistor pattern, wherein said switching means is controlled by said controlling electrode pattern portion.
Claim 3
Dependent Claim
20 words
A thermal recording recording head according to claim 1, wherein said switching means comprises switches elements composed of integrated circuits.
Claim 4
Dependent Claim
100 words
A thermal recording head having a multi-layer wiring structure with active elements at a high density, which comprises a substrate, a first conductor layer formed of a thick film and arranged on the substrate, a first insulator layer formed of a thich glass film and arranged on the first conductor layer, a heat-generating resistor layer formed of a respective thin film and arranged on the first insulator layer, a second conductor layer formed of a respective thin film and arranged on the resistor layer, and said active elements arranged selectively on the second conductor layer and the first insulator layer.
Claim 5
Dependent Claim
100 words
A thermal recording head having a multi-layer wiring structure with active elements at a high density, which comprises a substrate, a first conductor layer formed of a thick film and arranged on the substrate, a first insulator layer formed of a thich glass film and arranged on the first conductor layer, a heat-generating resistor layer formed of a respective thin film and arranged on the first insulator layer, a second conductor layer formed of a respective thin film and arranged on the resistor layer, and said active elements arranged selectively on the second conductor layer and the first insulator layer.
Claim 6
Dependent Claim
66 words
A thermal recording head as set forth in claim 3, wherein said thick film of the first conductor layer is of Cu, the first insulator layer is formed of a glass capable of being sintered in an N 2 atmosphere, and said thin film of the second conductor layer includes at least one layer of Cr, NiCr, W, Ta, Ti, Ni, Cu, Au, Pd or Al.
Claim 7
Dependent Claim
52 words
A thermal recording head as set forth in claim 3, wherein said thick glass film of said first insulator layer an integrally formed laminated structure comprising a first glass layer formed of a crystalline glass and a second glass layer formed of an amorphous glass and arranged on the first glass layer.
Claim 8
Dependent Claim
74 words
A thermal recording head as set forth in claim 3, wherein said thick glass film of said first insulator layer has an integrally formed laminated structure comprising a first glass layer formed of an amorphous glass having a high softening point and a second glass layer formed of an amorphous glass having a lower softening point than that of the amorphous glass of the first glass layer and arranged on the first glass layer.
Claim 9
Dependent Claim
42 words
A thermal recording head as set forth in claim 3, wherein said first and second conductor layers have a connection therebetween, and a nickel plating layer is provided between the first conductor layer and the second conductor layer at said connection therebetween.
Claim 10
Dependent Claim
119 words
A thermal recording head having a multi-layer wiring structure with active elements at a high density, which comprises a substrate, a first conductor layer formed of a respective thick film and arranged on the substrate, a first insulator layer formed of a thick glass film and arranged on the first conductor layer, a heat-generating resistor layer formed of a respective thin film and arranged on the resistor layer, a second conductor layer formed of a respective thick film and arranged on the second conductor layer, a third conductor layer formed of a respective thin film and arranged on the second insulator layer, and said active elements being selectively arranged on the third conductor layer and the second insulator layer.
Claim 11
Dependent Claim
119 words
A thermal recording head having a multi-layer wiring structure with active elements at a high density, which comprises a substrate, a first conductor layer formed of a respective thick film and arranged on the substrate, a first insulator layer formed of a thick glass film and arranged on the first conductor layer, a heat-generating resistor layer formed of a respective thin film and arranged on the resistor layer, a second conductor layer formed of a respective thick film and arranged on the second conductor layer, a third conductor layer formed of a respective thin film and arranged on the second insulator layer, and said active elements being selectively arranged on the third conductor layer and the second insulator layer.
Claim 12
Dependent Claim
71 words
A thermal recording head as set forth in claim 8, wherein said thick film of the first conductor layer is of Cu, said thick glass layer of the first insulator layer is formed of a glass capable of being sintered in an N 2 atmosphere, and said thin film of the second conductor layer includes at least one layer of Cr, NiCr, W, Ta, Ti, Ni, Cu, Au, Pd or Al.
Claim 13
Dependent Claim
54 words
A thermal recording head as set forth in claim 8, wherein said thick glass film of the first insulator layer has an integrally formed laminated structure comprising a first glass layer formed by printing a crystalline glass and a second glass layer formed of an amorphous glass and arranged on the first glass layer.
Claim 14
Dependent Claim
74 words
A thermal recording head as set forth in claim 8, wherein said thick glass film of the first insulator layer has an integrally formed laminated structure comprising a first glass layer formed of an amorphous glass having a high softening point and a second glass layer formed of an amorphous glass having a lower softening point than that of the amorphous glass of the first glass layer and arranged on the first glass layer.
Claim 15
Dependent Claim
19 words
The thermal recording head as in claim 3, wherein said active elements are arranged on said second conductor layer.
Claim 16
Dependent Claim
19 words
A thermal recording head as in claim 8, wherein said active elements are arranged on said third conductor layer.
References Cited (Backward Citations)
US3988569A
Cited
US4259564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-24 | 1991-02-23 | 1991-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-24 | 1995-02-23 | 1995-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-24 | 1999-02-23 | 1999-08-25 | $7700.00 | Window Closed / Lapsed |