Patent US3791858A successfully refreshed from Google Patents.
US3791858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming multi-layer circuit panels
Assignee: International Business Machines Corp
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Filing: 1971-12-13
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Granted: 1974-02-12
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Expires: 1991-12-13
Abstract
Abstract A process for producing multi-layer printed circuit panels using additive techniques for forming the conductors within each layer. The conductors are built up by metal deposition through photosensitive masks which are subsequently removed and replaced with fluid dielectric curable to a solid form. Additional layers are formed successively by repeating the process.
Inventors
- 👤 Pherson A Mc
- 👤 H Scheer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:37
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/46; H05K3/4644; H05K3/4682; H05K3/4647; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K1/0313; H05K2201/00; H05K2201/09; H05K2201/09209; H05K2201/095; H05K2201/096; H05K2201/09818; H05K2201/09881; H05K2203/00; H05K2203/07; H05K2203/0703; H05K2203/0733; H05K3/10; H05K3/108; H05K3/20; H05K3/205; H05K3/22; H05K3/24; H05K3/243
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
40 words
The method as described in claim 1 wherein the combined surfaces of said solid insulating material and said additionally deposited conductive material are substantially coplanar and parallel with said substrate surface after said additionally deposited conductive material has been exposed.
Claim 2
Dependent Claim
16 words
The method as set forth in claim 1 wherein said fluid insulative material is a liquid.
Claim 3
Dependent Claim
20 words
The method according to claim 1 wherein said electrically conductive coating and additionally deposited conductive material are the same metal.
Claim 4
Dependent Claim
19 words
The method according to claim 1 wherein said electrically conductive coating and additionally deposited conductive material are different metals.
Claim 5
Dependent Claim
22 words
The method according to claim 1 wherein said insulative material is an organic resin applied to said substrate in a liquid form.
Claim 6
Dependent Claim
22 words
The method according to claim 1 wherein said insulative material is an organic resin applied to said substrate in a powdered form.
Claim 7
Dependent Claim
13 words
The method according to claim 1 wherein said insulative material is powdered glass.
Claim 8
Dependent Claim
14 words
The method according to claim 1 wherein said substrate is an electrically insulative substance.
Claim 9
Dependent Claim
14 words
The method according to claim 1 wherein said substrate is an electrically conductive substance.
Claim 10
Dependent Claim
16 words
The method according to claim 1 wherein said substrate has both electrically conductive and insulative portions.
References Cited (Backward Citations)
US2728693A
Cited
US3707391A
Cited
US3391454A
Cited
US3388464A
Cited
US3405227A
Cited
US3585074A
Cited
US3589938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |