Patent US4270260A successfully refreshed from Google Patents.
US4270260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the salvage and restoration of integrated circuits from a substrate
Assignee: Individual
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Filing: 1978-10-10
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Granted: 1981-06-02
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Expires: 1998-10-10
Abstract
Abstract Components such as IC's mounted on a substrate such as a PCB are removed from the PCB in a heating apparatus. The heating apparatus has a mounting frame which positions the PCB above an array of infra red heating sources. The method includes the steps of bombarding the PCB with infra red energy which is absorbed and conducted to the solder joints to melt the solder to permit extraction of the components.
Inventors
- 👤 Ellison F. Krueger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:10
CPC Classifications
H; H05; H05K; H05K13/00; H05K13/04; H05K13/0486; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/3494; H10; H10W; H10W72/00; H10W72/071; H10W72/0711; H10W72/072; H10W72/07231; H10W72/07236; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49751; Y10T29/49755; Y10T29/49757
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
97 words
A salvage method for simultaneously desoldering a plurality of electronic components mounted on a substrate at solder joints such as a PCB, said method comprising: (a) exposing at least a substantial portion of the surface of the PCB to bombardment by infra red energy to heat the board to a temperature appropriate to effect a substantially even temperature rise causing melting of the solder securing said components; (b) controlling the temperature of the PCB by maintaining a controlled flow of air across a surface of the PCB; and (c) thereafter removing the selected components from the board.
Claim 2
Dependent Claim
97 words
A salvage method for simultaneously desoldering a plurality of electronic components mounted on a substrate at solder joints such as a PCB, said method comprising: (a) exposing at least a substantial portion of the surface of the PCB to bombardment by infra red energy to heat the board to a temperature appropriate to effect a substantially even temperature rise causing melting of the solder securing said components; (b) controlling the temperature of the PCB by maintaining a controlled flow of air across a surface of the PCB; and (c) thereafter removing the selected components from the board.
Claim 3
Dependent Claim
23 words
The method of claim 1 including the steps of pre-treating the board prior to heating by washing the board in an appropriate solvent.
Claim 4
Dependent Claim
27 words
The method of claim 1 including the additional steps of sorting the removed component into related families and accomplishing any necessary mechanical repair to the extracted components.
Claim 5
Dependent Claim
30 words
The method of claim 1 wherein said heating is accomplished on a frame which disposes said board in a position substantially parallel to the upper terminus of said heat source.
Claim 6
Dependent Claim
22 words
The method of claim 4 in which said heat source is substantially enclosed by reflective material to reduce the bombardment intensity differential.
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) | 1984-06-01 | 1984-12-01 | 1985-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-01 | 1988-12-01 | 1989-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-01 | 1992-12-01 | 1993-06-02 | $7700.00 | Window Closed / Lapsed |