US3588425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual source radiation bonding of plural joints
Assignee: Control Data Corp
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Filing: 1969-07-03
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Granted: 1971-06-28
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Expires: 1989-07-03
Abstract
Abstract A MANUFACTURING METHOD AND APPARATUS FOR SOLDERING THE LEADS OF INTEGRATED CIRCUIT FLAT PACKS TO THE CONTACT PADS OF PRINTED CIRCUIT BOARDS. A PAIR OF INFRARED LAMPS, FOCUSED BY CYLINDROIDAL REFLECTORS ON BOTH SIDES OF THE CIRCUIT BOARDS ARE USED TO SUPPLY HEAT. EACH CIRCUIT BOARD MAY CONTAIN CONTACT PADS OF WIDELY VARYING HEAT SINK CHARACTERISTICS. ADDITION OF THE SECOND LAMP AS A HEAT SOURCE ALLOWS WIDE USAGE OF THE SYSTEM BECAUSE ALL POSSIBLE HEAT REQUIREMENTS CAN BE SATISFIED WITHOUT THE RISKS OF HIGH HEAT CONCENTRATIONS WHICH MAY DAMAGE COMPONENTS AND CIRCUIT BOARDS.
Inventors
- 👤 Keith O Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:09
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/3494; B; B23; B23K; B23K1/00; B23K1/005; B23K1/0053; B23K2101/00; B23K2101/36; B23K2101/42; H05K2203/00; H05K2203/15; H05K2203/1581; H05K3/341; H05K3/3421
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |