Patent US4112178A successfully refreshed from Google Patents.
US3777221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer circuit package
Assignee: International Business Machines Corp
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Filing: 1972-12-18
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Granted: 1973-12-04
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Expires: 1992-12-18
Abstract
Abstract A pair of planar, inorganic substrates, each having generally parallel signal lines formed on a major surface, are oriented so that the circuit bearing surfaces face each other in spaced parallel relationship with the circuit lines of the two signal planes being orthogonally arranged with respect to each other and joined at selected crossover points. One substrate has circuit lines on its signal plane connected with land areas to which integrated circuit chips are attached, and the other substrate is smaller with portions cut out to expose the attached circuit chips. Circuit tabs permit edge connection to one substrate and provision is made for circuit changes adjacent the chip attachment sites. The non-adjacent major surfaces of the two substrates are optionally used as ground and voltage planes.
Inventors
- 👤 P Tatusko
- 👤 R Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:35
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/18; H05K1/182; H05K1/183; H05K1/02; H05K1/0286; H05K1/0287; H05K1/0289; H05K1/14; H05K1/144; H10; H10W; H10W70/00; H10W70/60; H10W70/611; H10W70/62; H10W70/63; H10W70/635; H10W90/00; H10W90/401; H10W90/701; H10W90/721; H10W90/724
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
88 words
A support for electrical devices comprising: a first electrically insulative substrate having a first major surface with a plurality of electriCal conductors and attachment sites for said electrical devices; a second electrically insulative substrate having a first major surface spaced from, parallel to and facing said first major surface of said first substrate and having electrical conductors thereon, said second substrate having openings therein exposing each of said attachment sites; and electrical connections between selected ones of said conductors on said first surfaces of each of said substrates.
Claim 2
Dependent Claim
88 words
A support for electrical devices comprising: a first electrically insulative substrate having a first major surface with a plurality of electriCal conductors and attachment sites for said electrical devices; a second electrically insulative substrate having a first major surface spaced from, parallel to and facing said first major surface of said first substrate and having electrical conductors thereon, said second substrate having openings therein exposing each of said attachment sites; and electrical connections between selected ones of said conductors on said first surfaces of each of said substrates.
Claim 3
Dependent Claim
35 words
A support as described in claim 1 wherein said interconnected electrical conductors of said pluralities of conductors on each of said first major surfaces of said two substrates are arranged generally orthogonally to one another.
Claim 4
Dependent Claim
19 words
A support as described in claim 1 wherein each of said attachment sites includes a circuit device connected thereto.
Claim 5
Dependent Claim
21 words
A support as described in claim 1 further including connection tabs along at least one edge of one of said substrates.
Claim 6
Dependent Claim
39 words
A support as described in claim 1 wherein first substrate is larger than said second substrate and has conductive connection pads on its first major surface area not coextensive with the first major surface area of said second substrate.
Claim 7
Dependent Claim
26 words
A support as described in claim 1 wherein the conductors adjacent said attachment sites include enlarged, auxiliary conductive pads for selective connection of auxiliary conductors thereto.
Claim 8
Dependent Claim
46 words
A support as described in claim 1 wherein each substrate has a second major surface with electrical conductors thereon which are interconnected with selected ones of said conductors on said first major surfaces of each of said substrates via conductive elements in through-holes in said substrates.
Claim 9
Independent Claim
120 words
A device of the class described comprising: a first electrically insulative substrate of inorganic material having a plurality of electrical conductors arranged generally along a first direction and having predetermined conductive areas thereon for attachment of electrical devices; a second electrically insulative substrate of inorganic material generally parallel with said first substrate and spaced therefrom, said second substrate having a plurality of electrical conductors on the surface thereof adjacent said first substrate, arranged generally along a second direction with respect to the said plurality of conductors on said first substrate, said second substrate having openings therethrough exposing said predetermined conductive areas; and a plurality of fused metal joints interconnecting selected conductors of said pluralities on said first and second substrates.
Claim 10
Independent Claim
120 words
A device of the class described comprising: a first electrically insulative substrate of inorganic material having a plurality of electrical conductors arranged generally along a first direction and having predetermined conductive areas thereon for attachment of electrical devices; a second electrically insulative substrate of inorganic material generally parallel with said first substrate and spaced therefrom, said second substrate having a plurality of electrical conductors on the surface thereof adjacent said first substrate, arranged generally along a second direction with respect to the said plurality of conductors on said first substrate, said second substrate having openings therethrough exposing said predetermined conductive areas; and a plurality of fused metal joints interconnecting selected conductors of said pluralities on said first and second substrates.
Claim 11
Dependent Claim
20 words
A support as described in claim 8 wherein the composition of said first and second substrates is a ceramic material.
Claim 12
Dependent Claim
51 words
A support as described in claim 8 wherein said first and second substrates each has a second major surface having thereon electrical supply conductors and conductive through-holes in said substrates connecting said supply conductors with selected ones of said conductors on the said respective first major surfaces of each said substrate.
Claim 13
Dependent Claim
16 words
A support as described in claim 8 wherein said fused metal joints are formed with solder.
Claim 14
Dependent Claim
37 words
A support as described in claim 8 wherein said pluralities of conductors on the first major surfaces of said first and second substrates are coated in selective areas with a material that is non-wettable by molten solder.
Claim 15
Dependent Claim
29 words
A support as described in claim 8 further including a plurality of spacers between said first and second substrates maintaining said first major surfaces in a fixed parallel relation.
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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |