US4699831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically insulating body
Assignee: Corning Glass Works
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Filing: 1985-06-21
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Granted: 1987-10-13
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Expires: 2005-06-21
Abstract
Abstract There is disclosed a composite body that is electrically insulating, and that is composed of metal particles dispersed in a continuous glassy matrix as a second phase. The metal particles are directionally anisotropic generally paralleling a predetermined plane through the body. This permits good thermal conductivity, while retaining the electrical insulating character of the glass, thus providing improved packaging for electronic components. A method of forming the composite body is also disclosed, as are methods of creating improved electronic packaging utilizing the composite material body.
Inventors
- 👤 Michael J. Hartmann
- 👤 Kuang-Hsin K. Lo
- 👤 Daniel A. Nolan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:03
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/85; H10H20/858; H10H20/8581; C; C03; C03C; C03C14/00; C03C14/004; H10F; H10F77/00; H10F77/60; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W70/692; C03C2214/00; C03C2214/04; C03C2214/08; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/25; Y10T428/256
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
64 words
An electrically insulating, composite body which exhibits a relatively high and strongly directional thermal conductivity in a predetermined plane through the body composed of discontinuous metal particles forming a secondary phase in a glassy matrix, the metal particles being directionally anisotropic generally paralleling said predetermined plane through the body and having an average particle size of at least about 10 microns prior to elongation.
Claim 2
Dependent Claim
64 words
An electrically insulating, composite body which exhibits a relatively high and strongly directional thermal conductivity in a predetermined plane through the body composed of discontinuous metal particles forming a secondary phase in a glassy matrix, the metal particles being directionally anisotropic generally paralleling said predetermined plane through the body and having an average particle size of at least about 10 microns prior to elongation.
Claim 3
Dependent Claim
13 words
A composite body in accordance with claim 1 wherein the metal is copper.
Claim 4
Dependent Claim
15 words
A composite body in accordance with claim 1 wherein the metal particles are distorted spheroids.
Claim 5
Dependent Claim
20 words
A composite body in accordance with claim 1 wherein the aspect ratio of the metal particles is at least 5:1.
Claim 6
Dependent Claim
22 words
A composite body in accordance with claim 1 wherein the matrix glass is a borosilicate with a softening point near 650° C.
Claim 7
Dependent Claim
22 words
A composite body in accordance with claim 1 wherein the metal particles are aluminum and the matrix glass is a borosilicate glass.
Claim 8
Dependent Claim
23 words
A composite body in accordance with claim 1 wherein the metal particles have an average particle size in the range of 10-100 microns.
Claim 9
Dependent Claim
81 words
A package for electrically conducting members selected from the group consisting of electronic components, optoelectronic components, and integrated circuits which exhibits a relatively high and strongly directional thermal conductivity in a predetermined plane, said package consisting of an electrically insulating, composite body composed of discontinuous metal particles forming a secondary phase in a glassy matrix, the metal particles being directionally anisotropic generally paralleling said predetermined plane and having an average particle size of at least about 10 microns prior to elongation.
Claim 10
Dependent Claim
81 words
A package for electrically conducting members selected from the group consisting of electronic components, optoelectronic components, and integrated circuits which exhibits a relatively high and strongly directional thermal conductivity in a predetermined plane, said package consisting of an electrically insulating, composite body composed of discontinuous metal particles forming a secondary phase in a glassy matrix, the metal particles being directionally anisotropic generally paralleling said predetermined plane and having an average particle size of at least about 10 microns prior to elongation.
Claim 11
Dependent Claim
22 words
A package in accordance with claim 8 having at least one metal member attached to an external surface as a heat sink.
Claim 12
Dependent Claim
22 words
A package in accordance with claim 8 wherein the metal particles have an average particle size in the range of 10-100 microns.
References Cited (Backward Citations)
US4282022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-12 | 1991-04-13 | 1991-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-12 | 1995-04-13 | 1995-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-12 | 1999-04-13 | 1999-10-13 | $7700.00 | Window Closed / Lapsed |