Patent US3616014A successfully refreshed from Google Patents.
US3616014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of printed circuit board
Assignee: Individual
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Filing: 1968-05-15
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Granted: 1971-10-26
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Expires: 1988-05-15
Abstract
Abstract A composite structure such as a printed circuit board is stacked back-to-back with a relatively yieldable backing in a press, and the stack is heated and compressed by applying a heated platen to the face of the structure on the opposite side thereof from the backing, so as to flatten the latter face while imparting a smooth unbroken contour to the strip-bearing face of the structure. Under the conditions of compression the backing is nonlaminable with the structure and after the compression step is relatively removed from the same.
Inventors
- 👤 Walter Weglin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:51
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/103; H05K3/107; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0364; H05K2201/0376; H05K2201/10; H05K2201/10227; H05K2201/1028; H05K2203/00; H05K2203/02; H05K2203/0278; H05K3/02; H05K3/04; H05K3/041; H05K3/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
21 words
The method according to claim 1 wherein the backing is disposed back to back with the strip-bearing face of the base.
Claim 2
Dependent Claim
29 words
The method according to claim 1 wherein the backing is disposed back to back with the face of the base on the other side thereof from the strip-bearing face.
Claim 3
Dependent Claim
16 words
The method according to claim 1 wherein the backing is comprised of a Kraft pulp material.
Claim 4
Dependent Claim
15 words
The method according to claim 1 wherein the backing is comprised of a rubber material.
Claim 5
Dependent Claim
18 words
The method according to claim 1 wherein the temperature of the stack is elevated to about 250*-300* F.
Claim 6
Dependent Claim
19 words
The method according to claim 1 wherein a parting film is interposed between the backing and the composite structure.
Claim 7
Dependent Claim
194 words
In the manufacture of a composite structure such as a printed circuit board comprised of a pattern of metal foil strips bonded to a resinous base, the steps of arranging the composite structure in a stack in which the foil-bearing face of the base is back to back with a continuous uninterrupted layer of compressible die material, and compressing the stack between a pair of rigid platens while applying heat thereto, so as to cause the base to undergo compression in the portions thereof disposed relatively opposite the strips of foil, without undergoing substantial lateral deformation in the portions thereof relatively surrounding the outline of the strips, and thereby to displace the base and the pattern of strips in relation to one another so as to provide the foil-bearing face of the base with a smooth unbroken contour in which the foil strips are raised on the face of the base and have a slightly convexly arcuate cross section at their outline edges, the layer of die material being nonlaminable with the composite structure under the conditions of compression so that the die material and composite structure can be parted from one another thereafter.
Claim 8
Dependent Claim
191 words
In the manufacture of a composite structure such as a printed circuit board comprised of a pattern of metal foil strips bonded to a resinous base, the steps of arranging the composite structure in a stack in which the face of the base on the other side thereof from the foil-bearing face, is back to back with a continuous uninterrupted layer of compressible die material, compressing the stack between a pair of rigid platens while applying heat thereto, so as to cause the base to undergo compression in the portions thereof disposed relatively opposite the strips of foil, without undergoing substantial lateral deformation in the portions thereof relatively surrounding the outline of the strips, and thereby to displace the base and the pattern of strips in relation to one another so as to provide the foil-bearing face of the base with a smooth unbroken contour in which the strips are entirely flat and impressed in the base substantially flush with the face thereof, the layer of die material being nonlaminable with the composite structure under the conditions of compression, and relatively removing the layer of die material from the composite structure.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |