US4589586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collet for die bonding
Assignee: RCA Corp
•
Filing: 1985-08-29
•
Granted: 1986-05-20
•
Expires: 2005-08-29
Abstract
Abstract A collet is described for use in die bonding of semiconductor dies which is comprised of a shank portion and a die holder portion which has triangular side walls and is open ended.
Inventors
- 👤 Carl Polansky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:18
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/10; B23K20/106; Y; Y10; Y10T; Y10T279/00; Y10T279/11
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
168 words
A collet for simultaneously holding and oscillating a semiconductor die on the surface of a mounting member during die bonding; said collet being an integral member comprised of a shank portion and a die holder portion; said shank portion being adapted for cooperative engagement with a die bonder and having first and second terminal ends with a vacuum conduit means extending from the first terminal end to the second terminal end; said die holder portion being formed at the second terminal end of the shank portion and consisting of an upper wall having a flat inner surface and an aperture defined therein in communication with the vacuum conduit means; said die holder portion further consisting of a pair of opposing spaced-apart triangular-shaped walls having flat inner surfaces and extending perpendicularly from the upper wall with the respective apexes of the triangular-shaped walls extending away from the upper wall, and said inner surfaces of said walls in combination defining an open ended internal receptacle for receiving said semiconductor die.
Claim 2
Dependent Claim
168 words
A collet for simultaneously holding and oscillating a semiconductor die on the surface of a mounting member during die bonding; said collet being an integral member comprised of a shank portion and a die holder portion; said shank portion being adapted for cooperative engagement with a die bonder and having first and second terminal ends with a vacuum conduit means extending from the first terminal end to the second terminal end; said die holder portion being formed at the second terminal end of the shank portion and consisting of an upper wall having a flat inner surface and an aperture defined therein in communication with the vacuum conduit means; said die holder portion further consisting of a pair of opposing spaced-apart triangular-shaped walls having flat inner surfaces and extending perpendicularly from the upper wall with the respective apexes of the triangular-shaped walls extending away from the upper wall, and said inner surfaces of said walls in combination defining an open ended internal receptacle for receiving said semiconductor die.
Claim 3
Dependent Claim
18 words
The collet according to claim 1 wherein the intersection of the inner surfaces of the walls are relieved.
Claim 4
Dependent Claim
34 words
The collet according to claim 1 wherein said semiconductor die has a predetermined length and said die holder portion has a length which is the same or less than that of the semiconductor die.
Claim 5
Dependent Claim
59 words
The collet according to claim 1 which when used in bonding a laser diode semiconductor die wherein the diode has a relatively strong support layer overlying a relatively brittle active layer, the triangular-shaped walls extend from the surface of the upper wall a given distance which is insufficient to contact the active layer of the laser diode semiconductor die.
Claim 6
Dependent Claim
35 words
An apparatus for die bonding a semiconductor die to a mounting surface, comprised of a die bonder and a collet according to claim 1 with said collet being in operative engagement with said die bonder.
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) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |