US3723943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of securing flat integrated circuits to printed wiring boards and a support device therefor
Assignee: AT&T Inc
•
Filing: 1971-02-10
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Granted: 1973-03-27
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Expires: 1991-02-10
Abstract
Abstract A flat integrated circuit package, having leads extending in cantilever from the edge of a substrate, is held in engagement with a printed wiring board by a support device which is temporarily attached to the board. The board is passed adjacent to a wave-soldering device to facilitate the soldering of areas where the ends of the cantilevered leads are pressed by the support device into overlapping engagement with land areas of printed wiring on the board. The support device supports the package in such a manner that the integrated circuit is protected and shielded from molten solder and heat emanating therefrom during the period when the board is passed adjacent to the soldering device.
Inventors
- 👤 R Hotze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:25
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/341; H05K3/3421; H05K3/301; H05K2201/00; H05K2201/10; H05K2201/10227; H05K2201/10393; H05K2201/10431; H05K2201/10439; H05K2201/10477; H05K2201/10613; H05K2201/10621; H05K2201/10689; H05K2203/00; H05K2203/30; H05K2203/304; H05K3/3465; H05K3/3468; H10; H10W; H10W72/00; H10W72/071; H10W72/072; H10W72/07231; H10W72/07236; Y; Y02; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
147 words
A method of securing leads of a circuit with printed wiring of a support board, which comprises the steps of: positioning a circuit-supporting carrier into a support device with leads of the carrier extending therefrom and from the support device; moving the support device toward a side of a support board having printed wiring thereon to place the extended leads of the carrier into exposed engagement with the printed wiring on the support board; attaching the support device to the side of the support board having the printed wiring to hold the extended leads in exposed engagement with the printed wiring of the support board during a subsequent operation wherein the leads are secured to the printed wiring, and shielding a circuit on the circuit-supporting carrier between the support device and the support board during the operation of securing the extended exposed leads to the printed wiring.
Claim 2
Independent Claim
147 words
A method of securing leads of a circuit with printed wiring of a support board, which comprises the steps of: positioning a circuit-supporting carrier into a support device with leads of the carrier extending therefrom and from the support device; moving the support device toward a side of a support board having printed wiring thereon to place the extended leads of the carrier into exposed engagement with the printed wiring on the support board; attaching the support device to the side of the support board having the printed wiring to hold the extended leads in exposed engagement with the printed wiring of the support board during a subsequent operation wherein the leads are secured to the printed wiring, and shielding a circuit on the circuit-supporting carrier between the support device and the support board during the operation of securing the extended exposed leads to the printed wiring.
Claim 3
Dependent Claim
41 words
The method as set forth in claim 1, which further comprises the step of applying forces to the extended leads of the circuit-supporting carrier to press the extended exposed leads firmly into engagement with the printed wiring of the support board.
Claim 4
Dependent Claim
40 words
The method as set forth in claim 1, which further comprises the step of applying solder to areas which include the extended leads in exposed engagement with the printed wiring to join by soldering the leads and the printed wiring.
Claim 5
Dependent Claim
50 words
The method as set forth in claim 3, which further comprises the step of removing the support device from attachment to the support board, whereby the circuit-supporting carrier remains assembled and secured to the printed wiring side of the board by the extended leads being soldered to the printed wiring.
Claim 6
Independent Claim
139 words
A device for supporting a circuit-supporting carrier for assembly and securing of leads extending from the carrier with printed wiring of a support board, which comprises: means for receiving therein a circuit-supporting carrier with leads thereof exposed and extending from the means and the carrier; means extending from the receiving means for attaching the receiving means to one side of a support board having printed wiring on the one side thereof; said attaching means formed integrally with the receiving means and movable therewith after said receiving means has been attached to the board to permit aligning of the extended exposed leads with the printed wiring, and means for pressing the extended exposed leads into firm engagement with the printed wiring on the one side of the support board as the receiving means iS being attached to the support board.
Claim 7
Independent Claim
139 words
A device for supporting a circuit-supporting carrier for assembly and securing of leads extending from the carrier with printed wiring of a support board, which comprises: means for receiving therein a circuit-supporting carrier with leads thereof exposed and extending from the means and the carrier; means extending from the receiving means for attaching the receiving means to one side of a support board having printed wiring on the one side thereof; said attaching means formed integrally with the receiving means and movable therewith after said receiving means has been attached to the board to permit aligning of the extended exposed leads with the printed wiring, and means for pressing the extended exposed leads into firm engagement with the printed wiring on the one side of the support board as the receiving means iS being attached to the support board.
Claim 8
Dependent Claim
53 words
The device as set forth in claim 5, wherein the pressing means includes shoulder surfaces of the receiving means which bend the leads outwardly from the receiving means and the carrier to firmly press the extended leads into exposed engagement with the printed wiring when the receiving means is attached to the board.
Claim 9
Independent Claim
169 words
A device for supporting a flat integrated circuit package for assembly of leads of the package with printed wiring of a printed wiring board, which comprises: a substantially flat segment; the segment formed with a cavity in one surface thereof for receiving a flat integrated circuit package therein; the flat segment and cavity being of sufficient dimensions to permit leads of the flat integrated circuit package to extend in cantilever from edge portions of the flat segment; the cavity of the flat segment having walls which are positionable adjacent to the printed wiring board to substantially enclose and shield an integrated circuit on the flat package so that the integrated circuit is protected from heat emanating from a subsequent securing operation where the extended exposed leads are secured with the printed wiring, and attaching means extending from the substantially flat segment for attaching the flat segment to a support board with the extended leads of the flat package placed in exposed engagement with printed wiring on the support board.
Claim 10
Independent Claim
169 words
A device for supporting a flat integrated circuit package for assembly of leads of the package with printed wiring of a printed wiring board, which comprises: a substantially flat segment; the segment formed with a cavity in one surface thereof for receiving a flat integrated circuit package therein; the flat segment and cavity being of sufficient dimensions to permit leads of the flat integrated circuit package to extend in cantilever from edge portions of the flat segment; the cavity of the flat segment having walls which are positionable adjacent to the printed wiring board to substantially enclose and shield an integrated circuit on the flat package so that the integrated circuit is protected from heat emanating from a subsequent securing operation where the extended exposed leads are secured with the printed wiring, and attaching means extending from the substantially flat segment for attaching the flat segment to a support board with the extended leads of the flat package placed in exposed engagement with printed wiring on the support board.
Claim 11
Dependent Claim
67 words
The device as set forth in claim 7, wherein the depth of the cavity is sufficiently greater than the flat integrated circuit package to permit the extended leads to be bent slightly outwardly from the flat package and the segment so that, when the flat segment is attached to the board, the leads initially engage and are subsequently urged into firm exposed engagement with the printed wiring.
Claim 12
Dependent Claim
58 words
The device as set forth in claim 7, wherein the attaching means comprises: at least a pair of spaced tabs extending from and formed integrally with the surface of the flat segment which is formed with the cavity, and each of the tabs being formed with a pair of spaced fingers which are biasingly movable toward each other.
Claim 13
Dependent Claim
38 words
The device as set forth in claim 7, wherein the flat segment and attaching means are composed of a plastic material capable of withstanding temperatures up to and including at least 525* F. without structural breakdown and deformation.
Claim 14
Dependent Claim
72 words
The device as set forth in claim 7, wherein the attaching means extends from the surface of the flat segment which includes the cavity to attach the segment to the board with an integrated circuit on the package facing outwardly from the cavity and being positionable adjacent to the board for shielded protection by the flat segment from external forces and heat during subsequent securing of the leads to the printed wiring.
Claim 15
Dependent Claim
54 words
The device as set forth in claim 9, wherein the tabs are dimensioned to be moved into openings in the printed wiring board to attach the flat segment to the board and are movable within the openings to permit movement of the extended exposed leads relative to the printed wiring for aligning the leads.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |