US4991286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for replacing defective electronic components
Assignee: Microelectronics and Computer Technology Corp
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Filing: 1989-12-20
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Granted: 1991-02-12
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Expires: 2009-12-20
Abstract
Abstract A method of replacing a defective electronic component having a plurality of electrical leads bonded to electrical contacts on a support by cutting leads adjacent the bond site, rebonding the stubs to the contacts, replacing the defective component and bonding the leads of the replacement component to the electrical contacts. Preferably, the leads are cut simultaneously with the rebonding of the stubs. The leads may be bonded to the top of the stub or to the side of the stub. A bonding tool is provided for simultaneously cutting a lead and rebonding the resultant stub.
Inventors
- 👤 Alexander J. Russo
- 👤 Daniel M. Andrews
- 👤 Gregory E. Pitts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:57
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/22; H05K3/225; H05K13/00; H05K13/04; H05K13/0486; H05K2201/00; H05K2201/10; H05K2201/10613; H05K2201/10621; H05K2201/10681; H05K2203/00; H05K2203/01; H05K2203/0195; H05K2203/17; H05K2203/176; H05K3/30; H05K3/32; H05K3/34; H05K3/3494; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/4913; Y10T29/49144; Y10T29/49718; Y10T29/49721; Y10T29/4973
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
76 words
A method of replacing a defective electronic component having a plurality of electrical leads bonded to electrical contacts of a support comprising, cutting the electrical leads adjacent the bonds of the leads to the contacts leaving a stub bonded to each contact, rebonding the stubs to the contacts, replacing the defective component with a replacement electronic component having electrical leads, and bonding the electrical leads of the replacement component to the electrical contacts of the support.
Claim 2
Independent Claim
76 words
A method of replacing a defective electronic component having a plurality of electrical leads bonded to electrical contacts of a support comprising, cutting the electrical leads adjacent the bonds of the leads to the contacts leaving a stub bonded to each contact, rebonding the stubs to the contacts, replacing the defective component with a replacement electronic component having electrical leads, and bonding the electrical leads of the replacement component to the electrical contacts of the support.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein the step of cutting the leads is performed simultaneously with the step of rebonding the stubs.
Claim 4
Dependent Claim
21 words
The method of claim 1 wherein the electrical leads of the replacement component are bonded to the tops of the stubs.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein the electrical leads of the replacement component are bonded to the contacts adjacent the stubs.
Claim 6
Dependent Claim
25 words
The method of claim 1 wherein the cutting of the electrical leads is substantially, but not entirely, through the leads for avoiding damaging the support.
Claim 7
Dependent Claim
19 words
The method of claim 1 wherein the bond between the electrical leads and the contacts is a gold-to-gold bond.
Claim 8
Dependent Claim
24 words
The method of claim 1 wherein the electrical leads are electrical leads of a TAB tape having the outer ends bonded to the contacts.
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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) | 1994-02-11 | 1994-08-13 | 1995-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-11 | 1998-08-13 | 1999-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-11 | 2002-08-13 | 2003-02-12 | $7700.00 | Window Closed / Lapsed |