US3612955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit board containing magnetic means for positioning devices
Assignee: AT&T Inc
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Filing: 1969-01-21
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Granted: 1971-10-12
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Expires: 1989-01-21
Abstract
Abstract Ferromagnetic materials are incorporated into circuit boards in accordance with predetermined patterns to enable by magnetic attraction substantially automatic positioning on the boards of semiconductor devices containing ferromagnetic material distributed therein in configurations to match the material in the circuit boards.
Inventors
- 👤 Alexander D Butherus
- 👤 Miles C Huffstutler Jr
- 👤 Jack A Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:03
CPC Classifications
H; H05; H05K; H05K13/00; H05K13/02; H05K13/022; H01; H01F; H01F7/00; H01F7/06; H01F7/20; H05K3/00; H05K3/30; H05K3/303; H10; H10P; H10P72/00; H10P72/50; H10P72/53; H10W; H10W72/00; H10W72/60; H05K2201/00; H05K2201/08; H05K2201/083; H05K2201/10; H05K2201/10007; H05K2201/10166; H05K2201/10613; H05K2201/10621; H05K2201/10689; H05K2203/00; H05K2203/16; H05K2203/166; H05K2203/168; H10W72/071; H10W72/072; H10W72/07231; H10W72/07236; Y; Y02; Y02P; Y02P70/00; Y02P70/50; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/4913; Y10T29/49133
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
Electronic apparatus comprising a mounting board and a beam lead semiconductor element mounted thereon, said mounting board comprising a layer of dielectric material, a conductive metal circuit pattern on the surface of said dielectric layer, said conductive circuit pattern having terminal portions, a plurality of said terminal portions selected in accordance with an asymmetrical pattern having permanent ferromagnetic material included therein, a beam lead semiconductor device affixed to said mounting board by said terminal portions and said beam leads, wherein those beam leads affixed to said selected terminal portions containing ferromagnetic material likewise contain ferromagnetic material, whereby said semiconductor device is capable of being affixed in only one orientation.
Claim 2
Dependent Claim
109 words
Electronic apparatus comprising a mounting board and a beam lead semiconductor element mounted thereon, said mounting board comprising a layer of dielectric material, a conductive metal circuit pattern on the surface of said dielectric layer, said conductive circuit pattern having terminal portions, a plurality of said terminal portions selected in accordance with an asymmetrical pattern having permanent ferromagnetic material included therein, a beam lead semiconductor device affixed to said mounting board by said terminal portions and said beam leads, wherein those beam leads affixed to said selected terminal portions containing ferromagnetic material likewise contain ferromagnetic material, whereby said semiconductor device is capable of being affixed in only one orientation.
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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |