US4792646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic wiring board and its production
Assignee: Ibiden Co Ltd
•
Filing: 1987-09-16
•
Granted: 1988-12-20
•
Expires: 2007-09-16
Abstract
Abstract A ceramic substrate having a plurality of holes arranged regularly with a specified pitch can be used for an universal high density ceramic wiring board, wherein predetermined one or more holes among said plurality of holes are used as through holes for interconnecting both side circuits, and the remaining holes not used for a circuit are filled with an electrical insulating material. Said ceramic substrate of universal type can easily be produced inexpensively and within a short lead time, because said substrate requires no individual mold for each of various circuits to punch a green sheet and can be kept in stock as a fired ceramic substrate.
Inventors
- 👤 Eyo Enomoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 07:55
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K1/0286; H05K1/0287; H05K3/00; H05K3/0011; H05K3/0055; H05K2201/00; H05K2201/09; H05K2201/09209; H05K2201/095; H05K2201/09581; H05K2201/09609; H05K2201/09818; H05K2201/09945; H05K2203/00; H05K2203/13; H05K2203/1377; H05K2203/1394; H05K3/10; H05K3/18; H05K3/181; H05K3/38; H05K3/386; H05K3/40; H05K3/42; H05K3/425; H05K3/426; H05K3/429; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49155; Y10T29/49163; Y10T29/49165
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
A ceramic wiring board comprising a ceramic substrate having a plurality of holes arranged regularly with a given pitch, at least one hole selected from said plurality of holes being filled with at least one electrical insulating material selected from the group consisting of a heat resistance resin and a mixture thereof with a filler and being unclaimed, and a conductor circuit produced by a plating process being formed on the surface of said substrate and in at least one hole of through-holes of said substrate.
Claim 2
Dependent Claim
21 words
A wiring board according to claim 1, wherein the volume resistivity of said ceramic substrate is 10 8 Ω-cm or above.
Claim 3
Dependent Claim
36 words
A wiring board according to claim 1, wherein the material for said ceramic substrate is at least one member selected from the group consisting of alumina, beryllia, mullite, low-temperature fireable ceramic, aluminum nitride and silicon carbide.
Claim 4
Dependent Claim
19 words
A wiring board according to claim 1, wherein most of said plurality of holes are arranged on a grid.
References Cited (Backward Citations)
JPS5090959A
Cited
US4313026A
Cited
JPS5623796A
Cited
JPS56100495A
Cited
US4681656A
Cited
US4641425A
Cited
US4715117A
Cited
US4672152A
Cited
US4705592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-20 | 1992-06-20 | 1992-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-20 | 1996-06-20 | 1996-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-20 | 2000-06-20 | 2000-12-20 | $7700.00 | Window Closed / Lapsed |