High density circuit board and method of making same
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United States of America Patent
Stats
-
Mar 2, 1993
Grant Date -
N/A
app pub date -
Aug 1, 1990
filing date -
Aug 1, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A multilayered circuit board assembly which includes a plurality of layered subassemblies each having electrically conducting wiring and at least one through hole therein. A first of these subassemblies possesses a greater wiring dnesity than the others while a second subassembly possesses a lesser resistance (and wiring density) than the others. In one example, several (e.g. at least four) such layered subassemblies may be included in the overall assembly such that those layers located along one side of the board may possess substantially greater wiring densities than the layers on the other side of the board while those layers on said other side will in turn possess lesser resistance (and greater current capacities). There are also described at least three methods for making the above multilayered circuit board assembly. Such a structure may be utilized in supercomputer applications.
First Claim
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
| Patent Owner | Address | |
|---|---|---|
| INTERNATIONAL BUSINESS MACHINES CORPORATION | NEW ORCHARD ROAD ARMONK NY 10504 |
International Classification(s)
Inventor(s)
| Inventor Name | Address | # of filed Patents | Total Citations |
|---|---|---|---|
| Chang, Chi S | Endicott, NY | 6 | 445 |
| Hoffarth, Joseph G | Binghamton, NY | 10 | 385 |
| Markovich, Voya R | Endwell, NY | 198 | 5225 |
| Snyder, Keith A | Vestal, NY | 17 | 671 |
| Wiley, John P | Vestal, NY | 8 | 426 |
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| Fee | Large entity fee | small entity fee | micro entity fee | due date |
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| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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