US4865193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape carrier for tape automated bonding process and a method of producing the same
Assignee: Mitsubishi Electric Corp
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Filing: 1988-06-22
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Granted: 1989-09-12
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Expires: 2008-06-22
Abstract
Abstract A tape carrier utilized in the tape automated bonding of semiconductor chips is disclosed which comprises a polyimide tape-shaped film having apertures therein, and patterns of leads and reinforcing members formed on a surface of the film. The reinforcing members may be made of the same material as the leads, such as copper, and formed by a single photoetching process on the film. The reinforcing members are disposed on those areas of the film which lie outside of the leads and which are subjected to stress during the sealing of the semiconductor chips into a resinous mold subsequent to the inner lead bonding thereof. For example, the reinforcing members may be disposed in the lead supporting zones of the film, or around the corners of the outer-lead apertures. The reinforcing members reduces the stresses exerted on the leads during the molding of the chips, so that the deformations thereof during the same process are minimized.
Inventors
- 👤 Haruo Shimamoto
- 👤 Tetsuya Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:10
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/701; H10W70/00; H10W70/40; H10W70/453; H10W72/071; H10W72/077; H10W74/00; H10W74/01; H10W74/016
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
177 words
A tape carrier for bonding electrically conducting leads to electrodes of semiconductor chips and for supporting the semiconductor chips and associated patterns of leads bonded thereto during a sealing of the semiconductor chips into respective resinous molds, comprising: an elongated tape-shaped film of a flexible material having formed therein repeating patterns of apertures, each pattern of apertures including a central aperture for receiving a semiconductor chip; repeating patterns of leads of an electrically, conducting metallic material disposed on a main surface of said film, each pattern of leads surrounding said central aperture in each one of the patterns of apertures, and each lead extending substantially perpendicularly to a side of said central aperture; and reinforcing means for reinforcing said film and leads during a molding of semiconductor chips into respective resinous molds, said reinforcing means comprising plate-shaped members of a high mechanical strength disposed on said main surface of said film in areas thereof which lie outside of said leads and are subjected to a mechanical pressure during a sealing of the semiconductor chips into resinous molds.
Claim 2
Dependent Claim
177 words
A tape carrier for bonding electrically conducting leads to electrodes of semiconductor chips and for supporting the semiconductor chips and associated patterns of leads bonded thereto during a sealing of the semiconductor chips into respective resinous molds, comprising: an elongated tape-shaped film of a flexible material having formed therein repeating patterns of apertures, each pattern of apertures including a central aperture for receiving a semiconductor chip; repeating patterns of leads of an electrically, conducting metallic material disposed on a main surface of said film, each pattern of leads surrounding said central aperture in each one of the patterns of apertures, and each lead extending substantially perpendicularly to a side of said central aperture; and reinforcing means for reinforcing said film and leads during a molding of semiconductor chips into respective resinous molds, said reinforcing means comprising plate-shaped members of a high mechanical strength disposed on said main surface of said film in areas thereof which lie outside of said leads and are subjected to a mechanical pressure during a sealing of the semiconductor chips into resinous molds.
Claim 3
Dependent Claim
24 words
A tape carrier as claimed in claim 1, wherein said leads and said plate-shaped members are made of a same electrically conducting metallic material.
Claim 4
Dependent Claim
21 words
A tape carrier as claimed in claim 2, wherein said reinforcing means comprises plate-shaped members which are integral with said leads.
Claim 5
Dependent Claim
57 words
A method of producing a step carrier as claimed in claim 2, comprising the steps of: forming said repeating pattern of apertures in an elongated tape-shaped film of a flexible material; and forming on said main surface of the film said repeating patterns of leads and said plate-shaped members of reinforcing means by a single photoetching process.
References Cited (Backward Citations)
US4438847A
Cited
US4812421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |