Patent US5453913A successfully refreshed from Google Patents.
US5453913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tab tape
Assignee: 3M Co
•
Filing: 1994-04-26
•
Granted: 1995-09-26
•
Expires: 2014-04-26
Abstract
Abstract A TAB tape having multiple metallic conductors arranged on the surface of a base film with substantially square device holes is formed with designed areas of stress refief formed by one or more slits and/or arrays of holes which extend outward from the corners or sides of the device holes, such that dimensional stability in the base film is improved in a direction parallel to inner leads when thermo-compression bonding is performed to connect the inner leads with IC chips resulting in improved connection reliability for connection between inner leads and IC chips.
Inventors
- 👤 Tatsunori Koyanagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:41
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/40; H10W70/453; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A tape automated bonding tape having a plurality of metallic conductors arranged on one surface of a base film having generally square device holes each device hole having a plurality of sides and corners connecting said sides, and means defining areas of stress relief formed to extend about the sides of said device holes for improving dimensional stability, said means defining areas including slits extending parallel to said sides of said device holes and slits extending outward from said corners of said device holes, wherein said tape has a two-ply structure in which an adhesive layer is interposed between said metallic conductors and a base film.
Claim 2
Dependent Claim
106 words
A tape automated bonding tape having a plurality of metallic conductors arranged on one surface of a base film having generally square device holes each device hole having a plurality of sides and corners connecting said sides, and means defining areas of stress relief formed to extend about the sides of said device holes for improving dimensional stability, said means defining areas including slits extending parallel to said sides of said device holes and slits extending outward from said corners of said device holes, wherein said tape has a two-ply structure in which an adhesive layer is interposed between said metallic conductors and a base film.
References Cited (Backward Citations)
US4234666A
Cited
US4330790A
Cited
US5064706A
Cited
US5235415A
Cited
US5284725A
Cited
US5270197A
Cited
US5288539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-09-25 | 1999-03-27 | 1999-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-25 | 2003-03-27 | 2003-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-25 | 2007-03-27 | 2007-09-26 | $7700.00 | Window Closed / Lapsed |