Patent US4703339A successfully refreshed from Google Patents.
US4703339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Package having a heat sink suitable for a ceramic substrate
Assignee: NEC Corp
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Filing: 1986-06-17
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Granted: 1987-10-27
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Expires: 2006-06-17
Abstract
Abstract A package including a heat sink especially suitable for a ceramic substrate is disclosed. The heat sink is formed of aluminum-silicon alloy material and is fixed to a surface of the ceramic substrate opposing a second surface on which at least one heat generating component is mounted.
Inventors
- 👤 Youichi Matsuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:29
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/10; H10W40/20; H10W40/25; H10W40/255; H10W72/00; H10W72/50; H10W72/541; H10W72/5449; Y; Y10; Y10S; Y10S165/00; Y10S165/905
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
64 words
A package comprising: a substrate made of a ceramic material; at least one heat generating component mounted on a first surface of said substrate; and at least one heat sink fixed on a second surface of said substrate opposite said first surface, and made of an aluminum-silicon alloy material, said aluminum-silicon alloy material containing silicon in a weight percentage ranging from 30% through 40%.
Claim 2
Dependent Claim
64 words
A package comprising: a substrate made of a ceramic material; at least one heat generating component mounted on a first surface of said substrate; and at least one heat sink fixed on a second surface of said substrate opposite said first surface, and made of an aluminum-silicon alloy material, said aluminum-silicon alloy material containing silicon in a weight percentage ranging from 30% through 40%.
Claim 3
Dependent Claim
19 words
A package as claimed in claim 1, wherein said substrate and said heat sink are fixed by an adhesive.
Claim 4
Dependent Claim
18 words
A package as claimed in claim 1, wherein said substrate and said heat sink are fixed by brazing.
Claim 5
Dependent Claim
73 words
A package comprising: a substrate having a first and a second surface on opposing sides thereof, said substrate being made of ceramic material; at least one heat generating component mounted on said first surface of the substrate; at least one heat sink fixed to said second surface of the substrate; said at least one heat sink being made of aluminum-silicon alloy material containing silicon in a weight percentage ranging from 30% to 40%.
Claim 6
Dependent Claim
73 words
A package comprising: a substrate having a first and a second surface on opposing sides thereof, said substrate being made of ceramic material; at least one heat generating component mounted on said first surface of the substrate; at least one heat sink fixed to said second surface of the substrate; said at least one heat sink being made of aluminum-silicon alloy material containing silicon in a weight percentage ranging from 30% to 40%.
Claim 7
Dependent Claim
22 words
A package as recited in claim 4, wherein said at least one heat sink is fixed to said substrate by an adhesive.
Claim 8
Dependent Claim
18 words
A package as recited in claim 4, wherein said heat sink is fixed to said substrate by brazing.
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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) | 1990-10-26 | 1991-04-27 | 1991-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-26 | 1995-04-27 | 1995-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-26 | 1999-04-27 | 1999-10-27 | $7700.00 | Window Closed / Lapsed |