Patent US3923581A successfully refreshed from Google Patents.
US3923581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a thermal display system
Assignee: Texas Instruments Inc
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Filing: 1974-01-09
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Granted: 1975-12-02
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Expires: 1994-01-09
Abstract
Abstract A thermal display system is described which comprises an array of semiconductor heater elements bonded to a ceramic substrate by a layer of epoxy of predetermined thickness. The thickness of the epoxy may be controlled by spacer means disposed in the epoxy between the silicon slice and the substrate. The spacer means may be particles of predetermined maximum size dispersed in the epoxy, may be protrusions from the ceramic substrate, or may be protrusions from the silicon slice. Methods are also described for fabricating each of the displays, including methods for controlling the thickness other than by the use of spacers.
Inventors
- 👤 Thomas R Payne
- 👤 Hubert R Plumlee
- 👤 Millard M Judy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:55
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/10; H05B3/12; H05B3/14; H05B3/148; B; B41; B41J; B41J2/00; B41J2/315; B41J2/32; B41J2/335; B41J2/34; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31518
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
305 words
IN THE FABRICATION OF A THERMAL DISPLAY DEVICE INCLUDING A SUBSTRATE AND AN ARRAY MEMBER HAVING A PLURALITY OF SELECTIVELY ENERGIZABLE HEATER ELEMENTS AND ADAPTED TO BE CONNECTED TO THE SUBSTRATE WHICH SERVES AS A HEAT SINK SUBSTRATE COMPRISING: OF BONDING SAID ARRAY MEMBER TO SAID SUBSTRATE COMPRISING: APPLYING A QUANTITY OF UNCURED ADHESIVE MATERIAL AS A LAYER OF SUBSTANTIALLY UNIFORM THICKNESS TO A PREDETERMINED AREA OF A SURFACE OF ONE OF SAID SUBSTRATE AND SAID ARRAY MEMBER TO BE CONNECTED TO AN OPPOSED SURFACE OF THE OTHER OF SAID SUBSTRATE AND SAID ARRAY MEMBER, PLACING SAID ARRAY MEMBER AND SAID SUBSTRATE TOGETHER WITH THE OPPOSED SURFACES THEREOF IN JUXTAPOSITION AND THE LAYER OF UNCURED ADHESIVE MATERIAL INTERPOSED THEREBETWEEN, POSITIONING A TOOL HAVING A PLURALITY OF PROBES DISPOSED IN A SINGLE AND AT LEAST ONE OTHER PROBE HAVING ITS END POSITIONED ABOVE THE PLANE IN WHICH SAID PLURALITY OF PROBES ARE DISPOED BY A DISTANCE EQUAL TO THE PREDETERMINED THICKNESS OF SAID ARRAY MEMBER AND SAID LAYER OF ADHESIVE MATERIAL SUCH THAT SAID PLURALITY OF PROBES DISPOSED IN A SINGLE PLANE ARE LOCATED IN ENGAGEMENT WITH THE PORTION OF SAID SUBSTRATE SURFACE BOUNDING THE LAYER OF ADHESIVE MATERIAL AND SAID ARRAY MEMBER AND SAID AT LEAST ONE OTHER PROBE IS IN ENGAGEMENT WITH THE OPPOSITE SURFACE OF SAID ARRAY MEMBER; LOCATING THE OPPOSED SURFACES OF SAID ARRAY MEMBER AND SAID SUBSTRATE IN A PREDETERMINED RELATION WITH THE LAYER OF UNCURED ADHESIVE MATERIAL INTERPOSED THEREBETWEEN AND HAVING A PREDETERMINED UNIFORM THICKNESS BY PRESSING SAID TOOL AGAINST THE OPPOSITE SURFACE OF SAID ARRAY MEMBER AND SAID SUBSTRATE SURFACE, AND CURING THE ADHESIVE MATERIAL TO PRODUCE A BONDED CONNECTION BETWEEN SAID ARRAY MEMBER AND SAID SUBSTRATE WITH A LAYER OF CURED ADHESIVE MATERIAL INTERPOSED THEREBETWEEN OF A UNIFORM PREDETERMINED THICKNESS SO AS TO EXHIBIT UNIFORM THERMAL CONDUCTIVITY CHARACTERISTICS.
Claim 2
Dependent Claim
305 words
IN THE FABRICATION OF A THERMAL DISPLAY DEVICE INCLUDING A SUBSTRATE AND AN ARRAY MEMBER HAVING A PLURALITY OF SELECTIVELY ENERGIZABLE HEATER ELEMENTS AND ADAPTED TO BE CONNECTED TO THE SUBSTRATE WHICH SERVES AS A HEAT SINK SUBSTRATE COMPRISING: OF BONDING SAID ARRAY MEMBER TO SAID SUBSTRATE COMPRISING: APPLYING A QUANTITY OF UNCURED ADHESIVE MATERIAL AS A LAYER OF SUBSTANTIALLY UNIFORM THICKNESS TO A PREDETERMINED AREA OF A SURFACE OF ONE OF SAID SUBSTRATE AND SAID ARRAY MEMBER TO BE CONNECTED TO AN OPPOSED SURFACE OF THE OTHER OF SAID SUBSTRATE AND SAID ARRAY MEMBER, PLACING SAID ARRAY MEMBER AND SAID SUBSTRATE TOGETHER WITH THE OPPOSED SURFACES THEREOF IN JUXTAPOSITION AND THE LAYER OF UNCURED ADHESIVE MATERIAL INTERPOSED THEREBETWEEN, POSITIONING A TOOL HAVING A PLURALITY OF PROBES DISPOSED IN A SINGLE AND AT LEAST ONE OTHER PROBE HAVING ITS END POSITIONED ABOVE THE PLANE IN WHICH SAID PLURALITY OF PROBES ARE DISPOED BY A DISTANCE EQUAL TO THE PREDETERMINED THICKNESS OF SAID ARRAY MEMBER AND SAID LAYER OF ADHESIVE MATERIAL SUCH THAT SAID PLURALITY OF PROBES DISPOSED IN A SINGLE PLANE ARE LOCATED IN ENGAGEMENT WITH THE PORTION OF SAID SUBSTRATE SURFACE BOUNDING THE LAYER OF ADHESIVE MATERIAL AND SAID ARRAY MEMBER AND SAID AT LEAST ONE OTHER PROBE IS IN ENGAGEMENT WITH THE OPPOSITE SURFACE OF SAID ARRAY MEMBER; LOCATING THE OPPOSED SURFACES OF SAID ARRAY MEMBER AND SAID SUBSTRATE IN A PREDETERMINED RELATION WITH THE LAYER OF UNCURED ADHESIVE MATERIAL INTERPOSED THEREBETWEEN AND HAVING A PREDETERMINED UNIFORM THICKNESS BY PRESSING SAID TOOL AGAINST THE OPPOSITE SURFACE OF SAID ARRAY MEMBER AND SAID SUBSTRATE SURFACE, AND CURING THE ADHESIVE MATERIAL TO PRODUCE A BONDED CONNECTION BETWEEN SAID ARRAY MEMBER AND SAID SUBSTRATE WITH A LAYER OF CURED ADHESIVE MATERIAL INTERPOSED THEREBETWEEN OF A UNIFORM PREDETERMINED THICKNESS SO AS TO EXHIBIT UNIFORM THERMAL CONDUCTIVITY CHARACTERISTICS.
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |