US4563541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Package providing high heat dissipation, in particular for microelectronics
Assignee: LCC-CICE-COMPAGNIE EUROPEENNE DE COMPOSANTS ELECTRONIQUES-101 BD MURAT-75781-PARIS CEDEX 16
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Filing: 1984-01-03
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Granted: 1986-01-07
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Expires: 2004-01-03
Abstract
Abstract A package of the flatpack type for microelectronic circuits comprises a metal base of material having good heat conductivity on which a metal frame is mounted by means of a hard brazing alloy. The frame has the function of supporting connections by means of insulating lead-in bushings of the glass bead type. The coefficient of expansion of the frame and of the base are matched so as to ensure that the base of the package does not exhibit any defect of surface planarity after cooling.
Inventors
- 👤 Michel Lebailly
- 👤 Maurice Jacquemin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:41
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/60; H10W76/10; H10W76/12; H10W76/13; H10W76/134
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
53 words
A package providing high heat dissipation, comprising: a copper metal base having good heat conductivity on which is mounted by means of a Au-Ni brazing alloy, a stainless steel frame which supports connections by means of insulating lead-in bushings of the soda-lime glass bead type, said connections being pins of a Fe-Ni alloy.
Claim 2
Dependent Claim
53 words
A package providing high heat dissipation, comprising: a copper metal base having good heat conductivity on which is mounted by means of a Au-Ni brazing alloy, a stainless steel frame which supports connections by means of insulating lead-in bushings of the soda-lime glass bead type, said connections being pins of a Fe-Ni alloy.
Claim 3
Dependent Claim
27 words
The package of claim 1, wherein said soda-lime glass bushings have a thermal coefficient which is lower than or equal to that of the stainless steel frame.
Claim 4
Dependent Claim
35 words
The package of claim 1, wherein the copper metal base and the stainless steel frame have thermal expansion coefficients which are close in value from room temperature to the Curie temperature of the two materials.
Claim 5
Dependent Claim
19 words
The package of claim 1, wherein said stainless steel frame is coated before brazing with a layer of Ni.
Claim 6
Dependent Claim
16 words
The package of claim 4, wherein said precoated Ni layer is 4 to 6 microns thick.
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) | 1989-01-06 | 1989-07-08 | 1990-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-06 | 1993-07-08 | 1994-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-06 | 1997-07-08 | 1998-01-07 | $7700.00 | Window Closed / Lapsed |