US4685998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of forming integrated circuits with contact pads in a standard array
Assignee: STMicroelectronics lnc USA
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Filing: 1986-10-09
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Granted: 1987-08-11
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Expires: 2006-10-09
Abstract
Abstract An integrated circuit chip includes a top layer of dielectric penetrated by conductive vias connecting electrical contacts within the integrated circuit proper to a network of electrical leads disposed on top of the dielectric layer; the network of leads, in turn, being connected to an array of contact pads adapted for simultaneous solder connection to a leadframe.
Inventors
- 👤 Daniel J. Quinn
- 👤 Wayne A. Mulholland
- 👤 Robert H. Bond
- 👤 Michael A. Olla
- 👤 Jerry S. Cupples
- 👤 Ilya L. Tsitovsky
- 👤 Barbara R. Mozdzen
- 👤 Charles F. Held
- 👤 Linda S. Wilson
- 👤 Yen T. Nguyen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:26
CPC Classifications
H; H10; H10W; H10W90/00; H10W72/00; H10W72/90; H10W72/071; H10W72/072; H10W72/07251; H10W72/20; H10W72/29; H10W72/50; H10W72/531; H10W72/533; H10W72/534; H10W72/551; H10W72/552; H10W72/5522; H10W72/5524; H10W74/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49121
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
138 words
A method of attaching electrical leads to an integrated circuit having a plurality of electrical devices connected in an electrical circuit by a network of electrical conduction paths to a first array of input/output contacts comprising the steps of: applying a layer of dielectric over said electrical circuit; opening apertures in said layer of dielectric above said first array of input/output contacts; applying a network of electrically conductive paths between said first array of input/output contacts and a second array of input/output contacts disposed in a predetermined pattern on said layer of dielectric; placing an array of electrically conductive leads having attachments tips in proximity to said second array of input/output contacts; and simultaneously forming an electrically conductive bond between at least some of said second array of input/output contacts and at least some of said attachment tips.
Claim 2
Independent Claim
138 words
A method of attaching electrical leads to an integrated circuit having a plurality of electrical devices connected in an electrical circuit by a network of electrical conduction paths to a first array of input/output contacts comprising the steps of: applying a layer of dielectric over said electrical circuit; opening apertures in said layer of dielectric above said first array of input/output contacts; applying a network of electrically conductive paths between said first array of input/output contacts and a second array of input/output contacts disposed in a predetermined pattern on said layer of dielectric; placing an array of electrically conductive leads having attachments tips in proximity to said second array of input/output contacts; and simultaneously forming an electrically conductive bond between at least some of said second array of input/output contacts and at least some of said attachment tips.
Claim 3
Dependent Claim
54 words
A method according to claim 1, in which said step of opening apertures in said dielectric includes the steps of applying a sheet of photosensitive material above said layer of dielectric, patterning said photosensitive material with aperture regions and chemically removing that portion of said dielectric below said aperture regions to form said apertures.
Claim 4
Dependent Claim
37 words
A method according to claim 1, in which said step of applying a network of electrically conductive paths includes the step of applying a thick-film pattern of conductive material to form said network of electrically conductive paths.
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) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |