Patent US4848639A successfully refreshed from Google Patents.
US4848639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compliant pad for use in tape automated bonding process
Assignee: AG Communication Systems Corp
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Filing: 1988-09-29
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Granted: 1989-07-18
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Expires: 2008-09-29
Abstract
Abstract A compliant pad or work piece for use in bonding the inner leads of integrated circuit devices as a part of a tape automated bonding process. The work piece is constructed of a metallic base layer to which is affixed a compliant pad, a cap support and a cap positioned on said compliant pad surrounding a gas channel which is connected to a source of gas such as nitrogen. A ceramic heat distribution layer is positioned over said gas channel and acts to support the integrated circuit device to be bonded to an associated tape during the tape automated bonding process.
Inventors
- 👤 Thomas D. Belanger, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:13
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/04; H10P72/0446
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
141 words
A work piece for use in facilitating the creation of inner region bonds as a step in a tape automated bonding process, said work piece comprising: a rigid base layer, including top and bottom surfaces; a compliant pad, including top and bottom surfaces, said bottom surface of said pad affixed to said top surface of said rigid base; a gas channel surrounded by said compliant pad and located over the top surface of said rigid base; a cap support, including top and bottom surfaces, said bottom surface of said cap support affixed to said compliant pad top surface; a cap positioned over said cap support top surface; a heat distribution layer surrounded by said cap support and positioned over said gas channel; a gas feed adapted for connection to a gas source, extending through said compliant pad into said gas channel.
Claim 2
Dependent Claim
141 words
A work piece for use in facilitating the creation of inner region bonds as a step in a tape automated bonding process, said work piece comprising: a rigid base layer, including top and bottom surfaces; a compliant pad, including top and bottom surfaces, said bottom surface of said pad affixed to said top surface of said rigid base; a gas channel surrounded by said compliant pad and located over the top surface of said rigid base; a cap support, including top and bottom surfaces, said bottom surface of said cap support affixed to said compliant pad top surface; a cap positioned over said cap support top surface; a heat distribution layer surrounded by said cap support and positioned over said gas channel; a gas feed adapted for connection to a gas source, extending through said compliant pad into said gas channel.
Claim 3
Dependent Claim
39 words
A work piece as claimed in claim 1, wherein there is further included a vacuum port adapted to be connected to a source of vacuum, extending through said base, through said gas channel and through said heat distribution layer.
Claim 4
Dependent Claim
16 words
A work piece as claimed in claim 1, wherein said rigid base is constructed of steel.
Claim 5
Dependent Claim
21 words
A work piece as claimed in claim 1, wherein: said compliant pad is affixed to said base by means of adhesive.
Claim 6
Dependent Claim
22 words
A work piece as claimed in claim 1, wherein: said cap support is affixed to said compliant pad by means of adhesive.
Claim 7
Dependent Claim
17 words
A work piece as claimed in claim 1, wherein: said compliant pad is constructed of silicone rubber.
Claim 8
Dependent Claim
19 words
A work piece as claimed in claim 1, wherein: said cap support is constructed of heat resistant ceramic material.
Claim 9
Dependent Claim
15 words
A work piece as claimed in claim 1, wherein: said cap is constructed of polyimide.
Claim 10
Dependent Claim
17 words
A work piece as claimed in claim 1, wherein: said heat distribution layer is constructed of silicon.
Claim 11
Dependent Claim
21 words
A work piece as claimed in claim 1, wherein: a gas feed is connected to a source of an inert gas.
Claim 12
Dependent Claim
19 words
A work piece as claimed in claim 1, wherein: a gas feed is connected to a source of nitrogen.
Claim 13
Dependent Claim
28 words
A work piece as claimed in claim 1, wherein: a gas feed is connected to a source of a forming gas comprising a mixture of hydrogen and nitrogen.
Claim 14
Dependent Claim
27 words
A work piece as claimed in claim 1, wherein: said compliant pad, said cap support, said cap, and said heat distribution layer are all circular in form.
Claim 15
Dependent Claim
27 words
A work piece as claimed in claim 1, wherein: said cap support further function as a stop to facilitate the positioning of devices on said work piece.
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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |