US4638404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clamping device for plate-shaped semiconductor components
Assignee: Siemens AG
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Filing: 1983-04-11
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Granted: 1987-01-20
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Expires: 2003-04-11
Abstract
Abstract A device which clamps a plurality of plate-shaped semiconductor components to a heat sink provided with a recess having a plurality of walls formed by respective inner faces of the heat sink comprises a pressure element disposed in the recess. Lateral surfaces of the pressure element are oriented parallel to the wall of the recess and the semiconductor components are sandwiched between the lateral surfaces of the pressure element and the recess walls. A clamping element engages the end faces of the pressure element. Upon the compressing of the pressure element by the clamping element, the lateral surfaces of the pressure element are forced laterally outwardly and perpendicularly to the recess walls, whereby the semiconductor components are pressed against the walls of the recess. The pressure element advantageously consists of elastically compressible material or may be composed of two wedges which can be moved relative to each other.
Inventors
- 👤 Kurt Grossmann
- 👤 Jurgen Bliesner
- 👤 Joachim Schikor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:52
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/60; H10W40/611; H10W78/00; H10W90/00; H10W40/20; H10W40/231
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
173 words
A device which clamps a plurality of plate-shaped semiconductor components to a heat sink provided with a recess having a plurality of walls formed by respective inner surfaces of the heat sink, comprising: a pressure element having a plurality of lateral contact surfaces and a pair of transverse end faces, each lateral contact surface being oriented parallel to an associated wall of said recess, said pressure element consisting of elastically compressible material, and pressure application means engageable with said end faces and exerting a clamping force thereon to compress said pressure element, each semiconductor component being disposed between one of said lateral contact surfaces and the associated wall of said recess, each semiconductor component having a planar face substantially entirely in contact with the respective lateral contact surface of said pressure element, each of said lateral contact surfaces being shiftable laterally outwardly and substantially perpendicularly to the associated wall of said recess upon an application of said clamping force to said end faces, whereby said semiconductor components are clamped to said heat sink.
Claim 2
Independent Claim
173 words
A device which clamps a plurality of plate-shaped semiconductor components to a heat sink provided with a recess having a plurality of walls formed by respective inner surfaces of the heat sink, comprising: a pressure element having a plurality of lateral contact surfaces and a pair of transverse end faces, each lateral contact surface being oriented parallel to an associated wall of said recess, said pressure element consisting of elastically compressible material, and pressure application means engageable with said end faces and exerting a clamping force thereon to compress said pressure element, each semiconductor component being disposed between one of said lateral contact surfaces and the associated wall of said recess, each semiconductor component having a planar face substantially entirely in contact with the respective lateral contact surface of said pressure element, each of said lateral contact surfaces being shiftable laterally outwardly and substantially perpendicularly to the associated wall of said recess upon an application of said clamping force to said end faces, whereby said semiconductor components are clamped to said heat sink.
Claim 3
Dependent Claim
32 words
The device defined in claim 1 wherein said recess and said pressure element are each in the form of a right prism, a semiconductor component engaging each of said lateral contact surfaces.
Claim 4
Dependent Claim
36 words
The device defined in claim 2 wherein said pressure application means includes a pair of clamping discs each engaging a respective end face of said pressure element, said pressure application means further including a clamping screw.
Claim 5
Dependent Claim
61 words
The device defined in claim 1 wherein said pressure application means includes a contact post projecting from said heat sink into said recess at an inner end thereof and further includes a circuit board to which said heat sink is secured, one end face of said pressure element engaging said contact post and the other end face engaging said circuit board.
Claim 6
Dependent Claim
32 words
The device defined in claim 1 wherein said recess and said pressure element are each in the form of a truncated pyramid, a semiconductor component engaging each of said lateral contact surfaces.
Claim 7
Dependent Claim
61 words
The device defined in claim 5 wherein said pressure application means includes a contact post projecting from said heat sink into said recess at an inner end thereof and further includes a circuit board to which said heat sink is secured, one end face of said pressure element engaging said contact post and the other end face engaging said circuit board.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-19 | 1990-07-21 | 1991-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-19 | 1994-07-21 | 1995-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-19 | 1998-07-21 | 1999-01-20 | $7700.00 | Window Closed / Lapsed |