Patent US1946523A successfully refreshed from Google Patents.
US4497875A
Expired / Lapsed
US
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Ceramic substrate with metal plate
Assignee: Hitachi Ltd
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Filing: 1983-02-08
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Granted: 1985-02-05
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Expires: 2003-02-08
Abstract
Abstract A ceramic substrate with metal plate, wherein a metal plate consisting mainly of copper is bonded to a ceramic substrate through a brazing layer consisting of a mixture of copper oxide and copper.
Inventors
- 👤 Hideo Arakawa
- 👤 Keiichi Kuniya
- 👤 Akio Chiba
- 👤 Seiki Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:38
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/68; H10W70/6875; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/302; C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; H05; H05K; H05K3/00; H05K3/38; H10W70/69; H10W70/692; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/123; C04B2237/124; C04B2237/126; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/341; C04B2237/343; C04B2237/345; C04B2237/348; C04B2237/38; C04B2237/40; C04B2237/407; C04B2237/50; C04B2237/70; C04B2237/708; C04B2237/86; H10W72/00; H10W72/50; H10W72/531; H10W72/5366; H10W72/851; H10W72/874; H10W72/884; H10W90/00; H10W90/701; H10W90/731; H10W90/734; H10W90/751; H10W90/754; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12528; Y10T428/12535
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
57 words
A ceramic substrate with a metal-containing plate comprising a metal-containing plate comprised mainly of copper, an insulation plate consisting of a sintered ceramic material and a brazing layer interposed between said metal-containing plate and said ceramic insulation plate for bonding said plates to each other, said brazing layer consisting of a mixture of copper oxide and copper.
Claim 2
Dependent Claim
57 words
A ceramic substrate with a metal-containing plate comprising a metal-containing plate comprised mainly of copper, an insulation plate consisting of a sintered ceramic material and a brazing layer interposed between said metal-containing plate and said ceramic insulation plate for bonding said plates to each other, said brazing layer consisting of a mixture of copper oxide and copper.
Claim 3
Dependent Claim
30 words
A ceramic substrate with a metal-containing plate according to claim 1, wherein said brazing layer consists of 1 to 23 wt. % of copper oxide and a balance of copper.
Claim 4
Dependent Claim
23 words
A ceramic substrate with a metal-containing plate according to claim 2, wherein said metal-containing plate is made of a copper-carbon fibrous composite material.
Claim 5
Dependent Claim
19 words
A ceramic substrate with a metal-containing plate according to claim 3, wherein said metal-containing plate consists essentially of copper.
Claim 6
Dependent Claim
19 words
A ceramic substrate with a metal-containing plate according to claim 2, wherein said insulation plate consists essentially of alumina.
Claim 7
Dependent Claim
23 words
A ceramic substrate with a metal-containing plate according to claim 5, wherein said metal-containing plate is made of a copper-carbon fibrous composite material.
Claim 8
Dependent Claim
30 words
A ceramic substrate with a metal-containing plate according to claim 6, wherein said brazing layer consists of 1 to 23 wt. % of copper oxide and a balance of copper.
Claim 9
Dependent Claim
30 words
A ceramic substrate with a metal-containing plate according to claim 1, wherein said brazing layer consists of 1 to 5 wt. % of copper oxide and a balance of copper.
Claim 10
Dependent Claim
36 words
A ceramic substrate with a metal-containing plate according to claim 1, wherein said insulation plate is a ceramic material selected from the group consisting of Al 2 O 3 ,MgO, SiO 2 and ZrO 2 .
Claim 11
Dependent Claim
73 words
A ceramic substrate with metal-containing plates comprising an insulation plate consisting of a sintered ceramic material, first and second plates comprised mainly of copper and disposed on both sides of said insulation plate and first and second brazing layers interposed, respectively, between said insulation plate and said first and second copper-containing plates to bond the insulation plate to the copper-containing plates, said brazing layer consisting of a mixture of copper oxide and copper.
Claim 12
Dependent Claim
73 words
A ceramic substrate with metal-containing plates comprising an insulation plate consisting of a sintered ceramic material, first and second plates comprised mainly of copper and disposed on both sides of said insulation plate and first and second brazing layers interposed, respectively, between said insulation plate and said first and second copper-containing plates to bond the insulation plate to the copper-containing plates, said brazing layer consisting of a mixture of copper oxide and copper.
Claim 13
Dependent Claim
30 words
A ceramic substrate with metal-containing plates according to claim 10, wherein said brazing layers each consist of 1 to 23 wt. % of copper oxide and a balance of copper.
Claim 14
Dependent Claim
22 words
A ceramic substrate with metal-containing plates according to claim 11, wherein said metal plates are made of a copper-carbon fibrous composite material.
Claim 15
Dependent Claim
18 words
A ceramic substrate with metal-containing plates according to claim 12, wherein said insulation plate is made of alumina.
Claim 16
Dependent Claim
29 words
A ceramic substrate with metal-containing plates according to claim 10, wherein said brazing layer consists of 1 to 5 wt. % of copper oxide and a balance of copper.
Claim 17
Dependent Claim
33 words
A ceramic substrate with metal-containing plates according to claim 10, wherein said ceramic material is selected from the group consisting of Al 2 O 3 , MgO, SiO 2 and ZrO 2 .
Claim 18
Dependent Claim
58 words
A bonded assembly which comprises: a copper-containing plate consisting essentially of copper, a copper-carbon fibrous composite, or a copper alloy; an insulation plate consisting of a sintered ceramic material; and a brazing layer consisting essentially of a mixture of copper oxide and copper, and interposed between said copper-containing plate and said insulation plate to bond both plates together.
Claim 19
Dependent Claim
58 words
A bonded assembly which comprises: a copper-containing plate consisting essentially of copper, a copper-carbon fibrous composite, or a copper alloy; an insulation plate consisting of a sintered ceramic material; and a brazing layer consisting essentially of a mixture of copper oxide and copper, and interposed between said copper-containing plate and said insulation plate to bond both plates together.
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) | 1988-02-05 | 1988-08-06 | 1989-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-05 | 1992-08-06 | 1993-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-05 | 1996-08-06 | 1997-02-05 | $7700.00 | Window Closed / Lapsed |