US4053942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for removing low level contaminants from a liquid
Assignee: International Business Machines Corp
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Filing: 1976-06-28
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Granted: 1977-10-11
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Expires: 1996-06-28
Abstract
Abstract A device for removing contaminant impurities, particularly contaminants existing at very low levels, from a liquid, including a heating element at least partially immersible in the liquid, a confinement means at least partially immersible in the liquid for maintaining a pulsating bubble of vapor of the liquid, the heating element located within the confining means, openings in the confining means to allow periodic partial escape of the vapor bubble and ingress of liquid.
Inventors
- 👤 William E. Dougherty, Jr.
- 👤 Lawrence V. Gregor
- 👤 Donald L. Klein
- 👤 Thomas F. Redmond
- 👤 Morton D. Reeber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:43
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/70; H10W40/73; H10W72/00; H10W72/50; H10W72/551; H10W72/552; H10W72/5522; H10W90/00; H10W90/701; H10W90/721; H10W90/724
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
135 words
In a liquid cooled semiconductor package assembly having at least one semiconductor device carrier substrate, at least one semiconductor device mounted on the substrate, a cover for forming an enclosure about said semiconductor device, and a cooling liquid in the enclosure adapted for cooling the device, the improvement comprising a means to trap and hold contaminants from said cooling liquid, said means including an electrical heating element immersed in the cooling liquid, and a confining means immersed in the cooling liquid and adapted to enclose and maintain a pulsating vapor bubble generated by said heating element, said heating element disposed within said confining means and at least partially immersed in said cooling liquid, means to permit controlled partial escape of a portion of the vapor bubble and ingress of cooling fluid to said confining means.
Claim 2
Dependent Claim
135 words
In a liquid cooled semiconductor package assembly having at least one semiconductor device carrier substrate, at least one semiconductor device mounted on the substrate, a cover for forming an enclosure about said semiconductor device, and a cooling liquid in the enclosure adapted for cooling the device, the improvement comprising a means to trap and hold contaminants from said cooling liquid, said means including an electrical heating element immersed in the cooling liquid, and a confining means immersed in the cooling liquid and adapted to enclose and maintain a pulsating vapor bubble generated by said heating element, said heating element disposed within said confining means and at least partially immersed in said cooling liquid, means to permit controlled partial escape of a portion of the vapor bubble and ingress of cooling fluid to said confining means.
Claim 3
Dependent Claim
26 words
The assembly of claim 1 wherein said confining means is comprised of two flat, parallel, closely spaced elements located on opposite sides of said heating element.
Claim 4
Dependent Claim
13 words
The assembly of claim 1 wherein said cooling liquid is a fluoro-carbon liquid.
Claim 5
Dependent Claim
19 words
The assembly of claim 2 wherein said flat elements are spaced in the range of 2 to 11 mils.
Claim 6
Dependent Claim
13 words
The assembly of claim 4 wherein said heating element is a twisted wire.
Claim 7
Dependent Claim
19 words
The assembly of claim 4 wherein said plates are maintained in spaced relation with a plurality of solder mounds.
Claim 8
Dependent Claim
23 words
The assembly of claim 2 wherein said heating element is a printed line of resistive paste on one of said flat spaced elements.
Claim 9
Dependent Claim
13 words
The assembly of claim 2 wherein said flat spaced elements are ceramic substrates.
References Cited (Backward Citations)
US4000509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |