US4732798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer ceramic substrate and method of making the same
Assignee: Panasonic Holdings Corp
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Filing: 1986-08-21
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Granted: 1988-03-22
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Expires: 2006-08-21
Abstract
Abstract The present invention relates to a base metal conductor multilayered substrate capable of being integral with thick film components such as thick film resistors and to a method for producing such substrate.
Inventors
- 👤 Toru Ishida
- 👤 Yasuharu Kikuchi
- 👤 Tatsurou Kikuchi
- 👤 Yasuhiko Horio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:51
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/46; H05K3/40; H05K3/4038; H05K3/4053; H05K3/4061; H10; H10D; H10D84/00; H10D84/01; H10W; H10W70/00; H10W70/60; H10W70/611; H10W70/67; H10W70/68; H10W70/685; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K1/16; H05K1/167; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/035; H05K3/22; H05K3/24; H05K3/245; H05K3/247; H05K3/248; H05K3/4611; H05K3/4626; H05K3/4629; H05K3/4644; H05K3/4664; H05K3/4667; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24802; Y10T428/24917
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
94 words
A multilayered substrate comprising: electrical insulating layers of ceramic; and internal conductor layers of one base metal of tungsten, molybdenum, copper, nickel and iron, provided between each two of said electrical insulating layers, an uppermost layer of said electrical insulating layers being provided with orifices through which necessary portions at said internal conductor layers are exposed, said orifices at said uppermost insulating layer being filled with a filler material comprising a noble metal and a mixture of BaO-B 2 O 3 series glass and alumina, which mixture is chemically inert to said base metal.
Claim 2
Dependent Claim
94 words
A multilayered substrate comprising: electrical insulating layers of ceramic; and internal conductor layers of one base metal of tungsten, molybdenum, copper, nickel and iron, provided between each two of said electrical insulating layers, an uppermost layer of said electrical insulating layers being provided with orifices through which necessary portions at said internal conductor layers are exposed, said orifices at said uppermost insulating layer being filled with a filler material comprising a noble metal and a mixture of BaO-B 2 O 3 series glass and alumina, which mixture is chemically inert to said base metal.
Claim 3
Dependent Claim
26 words
The multilayered substrate according to claim 1, wherein said insulating layers comprise ceramic containing alumina as a main constituent and said internal conductor layers comprise tungsten.
Claim 4
Dependent Claim
13 words
The multilayered substrate according to claim 1, wherein said noble metal is silver.
Claim 5
Dependent Claim
13 words
The multilayered substrate according to claim 1, wherein said noble metal is gold.
Claim 6
Dependent Claim
13 words
The multilayered substrate according to claim 1, wherein said noble metal is platinum.
Claim 7
Dependent Claim
136 words
A multilayered substrate comprising: electrical insulating layers of ceramic; internal conductor layers of one base metal of tungsten, molybdenum, copper, nickel and iron, provided between each two layers of said electrical insulating layers; thick film components provided on an uppermost layer of said electrical insulating layers; and noble metal series thick film conductors provided on said uppermost insulating layer as electrodes of said thick film components, said uppermost insulating layer being provided with orifices through which necessary portions of said internal conductor layers are exposed, said orifices being filled with a filler material comprising a noble metal and a mixture of BaO-B 2 O 3 series glass and alumina, which mixture is chemically inert to said base metal, said noble metal series thick film conductors being electrically connected to extended portions of said filler material respectively.
Claim 8
Dependent Claim
136 words
A multilayered substrate comprising: electrical insulating layers of ceramic; internal conductor layers of one base metal of tungsten, molybdenum, copper, nickel and iron, provided between each two layers of said electrical insulating layers; thick film components provided on an uppermost layer of said electrical insulating layers; and noble metal series thick film conductors provided on said uppermost insulating layer as electrodes of said thick film components, said uppermost insulating layer being provided with orifices through which necessary portions of said internal conductor layers are exposed, said orifices being filled with a filler material comprising a noble metal and a mixture of BaO-B 2 O 3 series glass and alumina, which mixture is chemically inert to said base metal, said noble metal series thick film conductors being electrically connected to extended portions of said filler material respectively.
Claim 9
Dependent Claim
19 words
The multilayered substrate according to claim 6, wherein said insulating layers comprise ceramic containing alumina as a main constituent.
Claim 10
Dependent Claim
13 words
The multilayered substrate according to claim 6, wherein said noble metal is silver.
Claim 11
Dependent Claim
13 words
The multilayered substrate according to claim 6, wherein said noble metal is gold.
Claim 12
Dependent Claim
13 words
The multilayered substrate according to claim 6, wherein said noble metal is platinum.
Claim 13
Dependent Claim
19 words
The multilayered substrate according to claim 6, wherein said noble metal series thick film conductors comprise silver-palladium series conductors.
Claim 14
Dependent Claim
18 words
The multilayered substrate according to claim 6, wherein said thick film components comprise RuO 2 series glaze resistors.
References Cited (Backward Citations)
US3372058A
Cited
US3827891A
Cited
US4168344A
Cited
US4283243A
Cited
US4465727A
Cited
US4490429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-22 | 1991-09-21 | 1992-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-22 | 1995-09-21 | 1996-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-22 | 1999-09-21 | 2000-03-22 | $7700.00 | Window Closed / Lapsed |