US3410401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substrate rework control circuit for a chip positioning machine
Assignee: International Business Machines Corp
•
Filing: 1965-05-27
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Granted: 1968-11-12
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Expires: 1985-05-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph G Drop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:21
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/04; H10P72/0446
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
IN A MACHINE FOR POSITIONING SEMICONDUCTOR CHIPS UPON PRINTED-CIRCUIT SUBSTRATES AND HAVING A SENSOR FOR DETECTING THE PATTERN OF THE CHIPS PRESENT ON EACH SUBSTRATE AND A REWORK HEAD ACTUABLE TO REJECT A SUBSTRATE, A REWORK CONTROL CIRCUIT COMPRISING: PROGRAM MEANS FOR SELECTABLY VARYING THE NUMBER AND LOCATIONS OF CHIPS CONSTITUTING AN ACCEPTABLE CHIP PATTERN FOR EACH SUBSTRATE, MEANS RESPONSIVE TO SAID PROGRAM MEANS AND SAID SENSOR TO DETERMINE WHETHER EACH SUBSTRATE AT THE SENSOR HAS AN ACCEPTABLE CHIP PATTERN THEREON, AND CONTROL MEANS TO ACTUATE SAID REWORK HEAD TO REJECT THE SUBSTRATE IF SAID SUBSTRATE DOES NOT HAVE AN ACCEPTABLE CHIP PATTERN THEREON.
References Cited (Backward Citations)
US2887622A
Cited
US2748235A
Cited
US2996184A
Cited
US3032191A
Cited
US3039604A
Cited
US3142382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |