US3692168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manipulation of semiconductor elements by magnetic means
Assignee: AT&T Inc
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Filing: 1970-09-04
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Granted: 1972-09-19
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Expires: 1990-09-04
Abstract
Abstract Ferromagnetic material is included selectively in semiconductor elements to enable handling of such elements during fabrication by means of magnetic fields. The invention is particularly, although not exclusively, adapted to beam leaded semiconductor devices in which ferromagnetic material may be included selectively in the beam leads as well as in or on the semiconductor body itself. Magnetic manipulation for a wide variety of purposes is disclosed.
Inventors
- 👤 Harry E Hughes Jr
- 👤 Jack A Morton
- 👤 Meyer H Wachs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:51
CPC Classifications
H; H05; H05K; H05K13/00; H05K13/02; H05K13/022; H01; H01F; H01F7/00; H01F7/06; H01F7/20; H10; H10P; H10P72/00; H10P72/50; H10P72/53; H10W; H10W72/00; H10W72/60; H10W72/01; H10W72/0198; H10W72/071; H10W72/072; H10W72/07231; H10W72/07236; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/4913; Y10T29/49133
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
69 words
A method of manipulating a beam lead semiconductor element comprising providing ferromagnetic material in said element in accordance with a pattern, said pattern related to the electrical configuration of said element, and exposing said element in a magnetic field having a restricted and particular orientation related to said pattern, said field having sufficient strength to attract and retain said semiconductor element in accordance with said orientation and said pattern.
Claim 2
Independent Claim
69 words
A method of manipulating a beam lead semiconductor element comprising providing ferromagnetic material in said element in accordance with a pattern, said pattern related to the electrical configuration of said element, and exposing said element in a magnetic field having a restricted and particular orientation related to said pattern, said field having sufficient strength to attract and retain said semiconductor element in accordance with said orientation and said pattern.
Claim 3
Dependent Claim
28 words
The method in accordance with claim 1 in which said magnetic field is arranged to exhibit a virtual movement so as to produce transport of said semiconductor element.
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |