Patent US5012324A successfully refreshed from Google Patents.
US5012324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat body, particularly for use as a heat sink for electronic power components
Assignee: Doduco Solutions GmbH
•
Filing: 1988-06-27
•
Granted: 1991-04-30
•
Expires: 2008-06-27
Abstract
Abstract PCT No. PCT/EP88/00564 Sec. 371 Date Feb. 24, 1989 Sec. 102(e) Date Feb. 24, 1989 PCT Filed Jun. 27, 1988 PCT Pub. No. WO89/00339 PCT Pub. Date Jan. 12, 1989.The bodies consist of a ceramic slab (1), which is covered on both sides by metal plates (2, 3), which are firmly bonded to the ceramic slab (1) throughout their contact surface without an interlayer and have marginal strips (5) which are reduced in thickness.
Inventors
- 👤 Wolfram Martin
- 👤 Brigitte Waibel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:09
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/20; H10W40/25; H10W40/255; H10W40/22; H10W40/226; F; F02; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
68 words
A flat body, particularly for use as a heat sink for electronic power components, consisting of a ceramic slab, which is covered on both sides by metal plates which are firmly joined to the ceramic slab throughout their contact surface, characterized in that the metal plates have provided on at least two edges of the peripheral margins, a strip reduced in thickness to improve resistance to thermal shock.
Claim 2
Dependent Claim
68 words
A flat body, particularly for use as a heat sink for electronic power components, consisting of a ceramic slab, which is covered on both sides by metal plates which are firmly joined to the ceramic slab throughout their contact surface, characterized in that the metal plates have provided on at least two edges of the peripheral margins, a strip reduced in thickness to improve resistance to thermal shock.
Claim 3
Dependent Claim
22 words
A body according to claim 1, characterized in that the two metal plates are joined to the ceramic slab without an interlayer.
Claim 4
Dependent Claim
25 words
A body according to claim 1, characterized in that the metal plates attached to both sides of the ceramic slab are arranged to be coextensive.
Claim 5
Dependent Claim
22 words
A body according to claim 1, characterized in that the metal plates attached to both sides of the ceramic slab are identical.
Claim 6
Dependent Claim
16 words
A body according to claim 1, characterized in that the metal plates are made of copper.
Claim 7
Dependent Claim
18 words
A body according to claim 1, characterized in that the marginal strips of the metal plates are beveled.
Claim 8
Dependent Claim
28 words
A body according to claim 6, characterized in that the marginal strips are beveled at an angle of about 20 ° to the surface of the ceramic slab.
Claim 9
Dependent Claim
18 words
A body according to claim 1, characterized in that the marginal strips of the metal plates are stepped.
Claim 10
Dependent Claim
31 words
A body according to claim 8, characterized in that the marginal strips are stepped once and have a reduced thickness of 40% to 50% of the thickness of the metal plates.
Claim 11
Dependent Claim
32 words
A body according to claim 1, characterized in that the marginal strips have a reduced thickness and have a width which is 1 to 3 times the thickness of the metal plates.
Claim 12
Dependent Claim
25 words
A body according to claim 1, characterized in that the metal plates and the ceramic plates have a thickness of 0.5 mm to 1 mm.
Claim 13
Dependent Claim
28 words
A body according to claim 9, characterized in that the marginal strips have a reduced thickness of about 45 per cent of the thickness of the metal plates.
Claim 14
Dependent Claim
27 words
A body according to claim 10, characterized in that the marginal strips have a width which is 1.5 to 2 times the thickness of the metal plates.
Claim 15
Dependent Claim
32 words
A body according to claim 9, characterized in that the marginal strips have a reduced thickness and have a width which is 1 to 3 times the thickness of the metal plates.
Claim 16
Dependent Claim
67 words
A flat body, particularly for use as a heat sink for electronic power components, consisting of a ceramic slab which is covered on both sides by metal plates which are firmly joined to the ceramic slab throughout their contact surface, characterized in that the metal plates are smaller in planar size than said ceramic slab to define marginal strips extending about the peripheries of said metal plates.
Claim 17
Dependent Claim
67 words
A flat body, particularly for use as a heat sink for electronic power components, consisting of a ceramic slab which is covered on both sides by metal plates which are firmly joined to the ceramic slab throughout their contact surface, characterized in that the metal plates are smaller in planar size than said ceramic slab to define marginal strips extending about the peripheries of said metal plates.
Claim 18
Dependent Claim
16 words
A body according to claim 15, characterized in that peripheral edges of said plates are beveled.
Claim 19
Dependent Claim
20 words
A body according to claim 15, characterized in that at least two opposed peripheral edges of said plates are stepped.
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) | 1994-04-29 | 1994-10-29 | 1995-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-29 | 1998-10-29 | 1999-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-29 | 2002-10-29 | 2003-04-30 | $7700.00 | Window Closed / Lapsed |