US4804974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal recording head
Assignee: Canon Inc
•
Filing: 1987-02-17
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Granted: 1989-02-14
•
Expires: 2007-02-17
Abstract
Abstract A thermal recording head comprises a heating resistor layer and at least a pair of electrodes electrically connected to said heating resistor layer, at least one combination of said heating resistor layer and said at least a pair of electrodes being formed on a substrate, wherein said heating resistor layer essentially consists of an amorphous material containing carbon atoms as a major constituent and halogen atoms.
Inventors
- 👤 Masao Sugata
- 👤 Tatsuo Masaki, deceased
- 👤 Hirokazu Komuro
- 👤 Shinichi Hirasawa
- 👤 Yasuhiro Yano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:44
CPC Classifications
H; H10; H10N; H10N97/00
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
75 words
A thermal recording head comprising a heating resistor layer and at least a pair of electrodes electrically connected to said heating resistor layer, at least one combination of said heating resistor layer and said at least a pair of electrodes being formed on a substrate, wherein said heating resistor layer essentially consists of an amorphous material containing carbon atoms as a major constituent and halogen atoms, said halogen atoms nonuniformly distributed in the amorphous material.
Claim 2
Dependent Claim
75 words
A thermal recording head comprising a heating resistor layer and at least a pair of electrodes electrically connected to said heating resistor layer, at least one combination of said heating resistor layer and said at least a pair of electrodes being formed on a substrate, wherein said heating resistor layer essentially consists of an amorphous material containing carbon atoms as a major constituent and halogen atoms, said halogen atoms nonuniformly distributed in the amorphous material.
Claim 3
Dependent Claim
24 words
A head according to claim 1, wherein a content of the halogen atoms in said heating resistor layer is 0.0001 to 30 atm %.
Claim 4
Dependent Claim
22 words
A heat according to claim 1, wherein the halogen atoms are one member selected from the group consisting of F and Cl.
Claim 5
Dependent Claim
37 words
A head according to claim 1, wherein said substrate has a surface layer at a heating resistor layer forming surface side, said surface layer being constituted by an amorphous material containing carbon atoms as a major constituent.
Claim 6
Dependent Claim
23 words
A head according to claim 1, wherein the halogen atoms are nonuniformly distributed along a direction of thickness of the heating resistor layer.
Claim 7
Dependent Claim
24 words
A head according to claim 5, wherein a control of the halogen atoms in said heating resistor layer is 0.0001 to 30 atm %.
Claim 8
Dependent Claim
22 words
A head according to claim 5, wherein the halogen atoms are one member selected from the group consisting of F and Cl.
Claim 9
Dependent Claim
37 words
A head according to claim 5, wherein said substrate has a surface layer at a heating resistor layer forming surface side, said surface layer being constituted by an amorphous material containing carbon atoms as a major constituent.
Claim 10
Dependent Claim
25 words
A head according to claim 5, wherein the halogen atoms are contained at a substrate side of said heating resistor layer at a higher concentration.
Claim 11
Dependent Claim
25 words
A head according to claim 5, wherein the halogen atoms are contained at a substrate side of said heating resistor layer at a lower concentration.
Claim 12
Dependent Claim
24 words
A head according to claim 5, wherein the halogen atoms are contained at a center of said heating resistor layer at a higher concentration.
Claim 13
Dependent Claim
16 words
A head according to claim 1, wherein the amorphous material contains an electrical conductivity control material.
Claim 14
Dependent Claim
24 words
A head according to claim 12, wherein a content of the halogen atoms in said heating resistor layer is 0.0001 to 30 atm %.
Claim 15
Dependent Claim
22 words
A head according to claim 12, wherein the halogen atoms are one member selected from the group consisting of F and Cl.
Claim 16
Dependent Claim
26 words
A head according to claim 12, wherein a content of the electrical conductivity control material in said heating resistor layer is 0.01 to 50000 atomic ppm.
Claim 17
Dependent Claim
17 words
A head according to claim 12, wherein the electrical conductivity control material is a Group III element.
Claim 18
Dependent Claim
17 words
A head according to claim 12, wherein the electrical conductivity control material is a Group V element.
Claim 19
Dependent Claim
37 words
A head according to claim 12, wherein said substrate has a surface layer at a heating resistor layer forming surface side, said surface layer being constituted by an amorphous material containing carbon atoms as a major constituent.
Claim 20
Dependent Claim
29 words
A head according to claim 12, wherein the halogen atoms and/or the electrical conductivity control material is nonuniformly distributed along a direction of thickness of said heating resistor layer.
Claim 21
Dependent Claim
24 words
A head according to claim 19, wherein a content of the halogen atoms in said heating resistor layer is 0.0001 to 30 atm %.
Claim 22
Dependent Claim
22 words
A head according to claim 19, wherein the halogen atoms are one member selected from the group consisting of F and Cl.
Claim 23
Dependent Claim
26 words
A head according to claim 19, wherein a content of the electrical conductivity control material in said heating resistor layer is 0.01 to 50,000 atomic ppm.
Claim 24
Dependent Claim
17 words
A head according to claim 19, wherein the electrical conductivity control material is a Group III element.
Claim 25
Dependent Claim
17 words
A head according to claim 19, wherein the electrical conductivity control material is a Group V element.
Claim 26
Dependent Claim
37 words
A head according to claim 19, wherein said substrate has a surface layer at a heating resistor layer forming surface side, said surface layer being constituted by an amorphous material containing carbon atoms as a major constituent.
Claim 27
Dependent Claim
31 words
A head according to claim 19, wherein the halogen atoms and/or the electrical conductivity control material is contained at a substrate side of said heating resistor layer at a higher concentration.
Claim 28
Dependent Claim
31 words
A head according to claim 19, wherein the halogen atoms and/or the electrical conductivity control material is contained at a substrate side of said heating resistor layer at a lower concentration.
Claim 29
Dependent Claim
30 words
A head according to claim 19, wherein the halogen atoms and/or the electrical conductivity control material is contained at a center of said heating resistor layer at a higher concentration.
Claim 30
Dependent Claim
20 words
A head according to claim 19, wherein the halogen atoms and the electrical conductivity control material have different distribution curves.
Claim 31
Dependent Claim
21 words
A head according to claim 19, wherein the halogen atoms and the electrical conductivity control material have an identical distribution curve.
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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) | 1992-02-14 | 1992-08-15 | 1993-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-14 | 1996-08-15 | 1997-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-14 | 2000-08-15 | 2001-02-14 | $7700.00 | Window Closed / Lapsed |