US5288539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tab tape with a peeling-prevention structure for the conductive layer
Assignee: International Business Machines Corp
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Filing: 1991-12-04
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Granted: 1994-02-22
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Expires: 2011-12-04
Abstract
Abstract The invention involves a TAB (tape automated bonding) tape which includes an electrically conductive layer and a supporting layer. Significantly, the supporting layer includes at least one peeling-prevention slit adjacent a part of the electrically conductive layer which is apt to peel off from the supporting layer when the TAB tape is subjected to stresses, such as thermally-induced stresses and bending stresses.
Inventors
- 👤 Kaoru Araki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:57
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/11; H05K1/118; H10; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/688; H05K1/0271; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0388; H05K2201/0394; H05K2201/10; H05K2201/10613; H05K2201/10621; H05K2201/10681; H05K2203/00; H05K2203/16; H05K2203/162; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/24314; Y10T428/24322; Y10T428/24331; Y10T428/24802; Y10T428/24917; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31721
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
112 words
A TAB tape, having a peeling - prevention structure, comprising: a patterned, electrically conductive layer including at least one test pad and at least one circuit line, said at least one circuit line being connected to said at least one test pad; and an electrically insulating, supporting layer which supports said patterned, electrically conductive layer, said supporting layer including a slit which is positioned, at least in part, directly beneath said test pad, wherein aid electrically conductive layer and said supporting layer have different thermal expansion coefficients, and wherein said slit is capable of preventing peeling of said electrically conductive layer from said supporting layer during thermal expansion of said TAB tape.
Claim 2
Dependent Claim
112 words
A TAB tape, having a peeling - prevention structure, comprising: a patterned, electrically conductive layer including at least one test pad and at least one circuit line, said at least one circuit line being connected to said at least one test pad; and an electrically insulating, supporting layer which supports said patterned, electrically conductive layer, said supporting layer including a slit which is positioned, at least in part, directly beneath said test pad, wherein aid electrically conductive layer and said supporting layer have different thermal expansion coefficients, and wherein said slit is capable of preventing peeling of said electrically conductive layer from said supporting layer during thermal expansion of said TAB tape.
Claim 3
Dependent Claim
16 words
A TAB as claimed in claim 1, wherein said slit is formed to include tapered sidewalls.
Claim 4
Dependent Claim
17 words
A TAB tape as claimed in claim 1, wherein said electrically conductive layer is a copper layer.
Claim 5
Dependent Claim
16 words
A TAB tape as claimed in claim 1, wherein said supporting layer is a polyimide layer.
References Cited (Backward Citations)
EP0057253A2
Cited
US4839713A
Cited
US5064706A
Cited
US5036380A
Cited
US5072283A
Cited
US4913930A
Cited
EP0368741A1
Cited
EP0401848A2
Cited
JPH03263444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-21 | 1997-08-23 | 1998-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-21 | 2001-08-23 | 2002-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-21 | 2005-08-23 | 2006-02-22 | $7700.00 | Window Closed / Lapsed |