US5011732A
Expired / Lapsed
US
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Glass ceramic substrate having electrically conductive film
Assignee: NGK Insulators Ltd
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Filing: 1989-07-17
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Granted: 1991-04-30
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Expires: 2009-07-17
Abstract
Abstract A glass ceramic substrate containing mica and having an electrically conductive film formed thereon includes a bonding layer made of a material including at least silicon oxide, which is formed on a portion of one of the opposite surfaces of the glass ceramic substrate containing mica. The electrically conductive film is formed on the bonding layer and has a major component consisting of at least one element selected from the group consisting of aluminum, tungsten, molybdenum, titanium, tantalum and chromium.
Inventors
- 👤 Yukihisa Takeuchi
- 👤 Masayasu Ishikawa
- 👤 Koji Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:24
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/3602; C03C17/3607; C03C17/3642; C03C17/3652; C03C17/3655; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K3/00; H05K3/38; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/24926; Y10T428/25; Y10T428/251
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
82 words
A glass ceramic substrate containing mica, which has an electrically conductive film formed thereon, comprising: a bonding layer made of a material including at least silicon oxide, which is formed on a portion of at least one of the surfaces of said glass ceramic substrate containing mica; and said electrically conductive film being formed on said bonding layer, and having a major component consisting of at least one element selected from the group consisting of aluminum, tungsten, molybdenum, titanium, tantalum and chromium.
Claim 2
Dependent Claim
82 words
A glass ceramic substrate containing mica, which has an electrically conductive film formed thereon, comprising: a bonding layer made of a material including at least silicon oxide, which is formed on a portion of at least one of the surfaces of said glass ceramic substrate containing mica; and said electrically conductive film being formed on said bonding layer, and having a major component consisting of at least one element selected from the group consisting of aluminum, tungsten, molybdenum, titanium, tantalum and chromium.
Claim 3
Dependent Claim
51 words
A glass ceramic substrate according to claim 1, wherein said bonding layer is formed by applying to said one surface of the glass ceramic substrate a solution which contains at least a silicon compound, and subsequently effecting a heat treatment of said bonding layer, prior to forming said electrically conductive film.
Claim 4
Dependent Claim
30 words
A glass ceramic substrate according to claim 2, wherein said heat treatment prior to forming said electrically conductive film is conducted at a temperature within a range of 200°-1000° C.
Claim 5
Dependent Claim
23 words
A glass ceramic substrate according to claim 3, wherein said heat treatment is conducted at a temperature within a range of 400°-800° C.
Claim 6
Dependent Claim
29 words
A glass ceramic substrate according to claim 1, which is subjected to a heat treatment in a non-oxidizing atmosphere after said electrically conductive film is formed on the substrate.
Claim 7
Dependent Claim
29 words
A glass ceramic substrate according to claim 5, wherein said heat treatment after forming said electrically conductive film is conducted at a temperature within a range of 500°-1000° C.
Claim 8
Dependent Claim
23 words
A glass ceramic substrate according to claim 6, wherein said heat treatment is conducted at a temperature within a range of 800°-1000° C.
Claim 9
Dependent Claim
22 words
A glass ceramic substrate according to claim 1, wherein said bonding layer has a thickness selected within a range of 0.1-20 microns.
Claim 10
Dependent Claim
22 words
A glass ceramic substrate according to claim 8, wherein said bonding layer has a thickness selected within a range of 0.3-3 microns.
Claim 11
Dependent Claim
19 words
A glass ceramic substrate according to claim 9, wherein said glass ceramic substrate contains 50-70% by weight of mica.
Claim 12
Dependent Claim
15 words
A glass ceramic substrate according to claim 1, wherein said electrically conductive film includes chromium.
Claim 13
Dependent Claim
92 words
A glass ceramic substrate containing mica in an amount of 30-80 wt %, said substrate having an electrically conductive film formed thereon, said substrate comprising: a bonding layer made of a material including at least silicon oxide, which is formed on a portion of at least one of the surfaces of said glass ceramic substrate containing mica; and said electrically conductive film being formed on said bonding layer, and having a major component consisting of at least one element selected from the group consisting of aluminum, tungsten, molybdenum, titanium, tantalum and chromium.
Claim 14
Dependent Claim
92 words
A glass ceramic substrate containing mica in an amount of 30-80 wt %, said substrate having an electrically conductive film formed thereon, said substrate comprising: a bonding layer made of a material including at least silicon oxide, which is formed on a portion of at least one of the surfaces of said glass ceramic substrate containing mica; and said electrically conductive film being formed on said bonding layer, and having a major component consisting of at least one element selected from the group consisting of aluminum, tungsten, molybdenum, titanium, tantalum and chromium.
Claim 15
Dependent Claim
17 words
The glass ceramic substrate of claim 12, wherein said glass ceramic substrate contains 50-70 wt % mica.
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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) | 1994-04-29 | 1994-10-29 | 1995-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-29 | 1998-10-29 | 1999-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-29 | 2002-10-29 | 2003-04-30 | $7700.00 | Window Closed / Lapsed |