Patent US4814030A successfully refreshed from Google Patents.
US4814030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monolithic substrate for an electronic power component and process for the production thereof
Assignee: Xeram SA
•
Filing: 1987-11-09
•
Granted: 1989-03-21
•
Expires: 2007-11-09
Abstract
Abstract The invention concerns a monolithic substrate for an electronic power component which is formed by a sintered stack of layers of dielectric material having an internal system of ducts for the circulation of a cooling fluid. The system is a closed system which opens at the surface of the substrate by way of two orifices which respectively provide for the intake of the pressurized fluid into the internal system of ducts and the removal thereof from said system.
Inventors
- 👤 Jacques Dubuisson
- 👤 Rene Boutterin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:23
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/0272; H10; H10W; H10W40/00; H10W40/40; H10W40/43; H10W40/47; H05K1/03; H05K1/0306; H05K2201/00; H05K2201/06; H05K2201/064; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24479; Y10T428/24562; Y10T428/24744
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
76 words
A process for the production of a monolithic substrate for an electronic power component comprising the steps of: depositing an evanescent ink lacking a mineral pigment in accordance with a predetermined pattern on at least one sheet of raw dielectric material, wherein said evanescent ink comprises unfilled polyvinylbutyral; stacking a plurality of said sheets of dielectric material; and sintering said stack of dielectric material sheets, whereby a residual volume is produced to form a continuous duct.
Claim 2
Dependent Claim
76 words
A process for the production of a monolithic substrate for an electronic power component comprising the steps of: depositing an evanescent ink lacking a mineral pigment in accordance with a predetermined pattern on at least one sheet of raw dielectric material, wherein said evanescent ink comprises unfilled polyvinylbutyral; stacking a plurality of said sheets of dielectric material; and sintering said stack of dielectric material sheets, whereby a residual volume is produced to form a continuous duct.
Claim 3
Dependent Claim
23 words
The process of claim 1 including the step of forming inlet and outlet orifices between said duct and surfaces of said sintered stack.
Claim 4
Dependent Claim
48 words
The process of claim 2 wherein said deposition step is performed on at least two of said sheets so that said duct comprises a plurality of duct segments at different levels in the thickness of said stack, including the step of forming interconnection means between said duct segments.
Claim 5
Dependent Claim
34 words
The process of claim 1 including the step, between said depositing step and said stacking step, of depositing an ink charged with mineral pigment on said at least one sheet to form electrical interconnections.
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) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |