US3907660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for coating glass
Assignee: PPG Industries Inc
•
Filing: 1974-01-03
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Granted: 1975-09-23
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Expires: 1994-01-03
Abstract
Abstract Transparent, electroconductive articles produced by cathode sputtering on refractory substrates, a metal from the group of elements having an atomic number from 48 to 51 and mixtures thereof, and preferably a controlled proportion of tin to indium, in a low pressure atmosphere containing a controlled amount of oxygen at a controlled substrate temperature within a temperature range of 400*F. to a temperature at which the substrate becomes distorted or detrimentally affected, usually at or above 600*F.
Inventors
- 👤 Frank H Gillery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:35
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/34; C03; C03C; C03C17/00; C23C14/0021; C23C14/0036; C23C14/06; C23C14/08; C23C14/086
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
AN APPARATUS FOR APPLYING A UNIFORM TRANSPARENT, MATALCONTAINING, ELECTRONCONDUCTVE COATING TO A SUBSTRATE COMPRISING: A. MEANS FOR PROVIDING A LOW PRESSURE AT MOSPHERE NOT EXCEEDING 10-1 TORR AND CONTAINING A MIXTURE OF OXYGEN AND AN INERT GAS, B. MEANS FOR SUPPORTING A SUBSTRATE WITHIN SAID LOW PRESSURE ATMOSPHERE BY SUPPORTING SAID SUBSTRATE AT A PLURALITY OF SUPPORT POINTS PERMITTING SUBSTANTIALLY ALL OF THE SRFACES OF SAID SUBSTRATE FREE FRON CONTACT BY SAID SUPPORTING MEANS, C. MEANS COMPRISING A CATHODE AND AN ANODE FOR SPUTTERING SAID COATING ONTO SAID SUBSTRATE WHILE ITS EMPERATURE IS
Claim 2
Independent Claim
93 words
AN APPARATUS FOR APPLYING A UNIFORM TRANSPARENT, MATALCONTAINING, ELECTRONCONDUCTVE COATING TO A SUBSTRATE COMPRISING: A. MEANS FOR PROVIDING A LOW PRESSURE AT MOSPHERE NOT EXCEEDING 10-1 TORR AND CONTAINING A MIXTURE OF OXYGEN AND AN INERT GAS, B. MEANS FOR SUPPORTING A SUBSTRATE WITHIN SAID LOW PRESSURE ATMOSPHERE BY SUPPORTING SAID SUBSTRATE AT A PLURALITY OF SUPPORT POINTS PERMITTING SUBSTANTIALLY ALL OF THE SRFACES OF SAID SUBSTRATE FREE FRON CONTACT BY SAID SUPPORTING MEANS, C. MEANS COMPRISING A CATHODE AND AN ANODE FOR SPUTTERING SAID COATING ONTO SAID SUBSTRATE WHILE ITS EMPERATURE IS
Claim 3
Dependent Claim
31 words
The apparatus according to claim 1 wherein said radiant heating means comprises electric resistance heating means for operating at voltages substantially lower than a voltage sufficient to operate a sputtering cathode.
Claim 4
Dependent Claim
34 words
The apparatus according to claim 2 wherein said radiant heating means is coupled to an alternating current power source for providing a voltage across said radiant heating means of less than about 50 volts.
Claim 5
Dependent Claim
33 words
The apparatus according to claim 2 wherein said cathode is coupled to a direct current power source for providing a voltage between said cathode and said anode of at least about 1,000 volts.
Claim 6
Dependent Claim
84 words
The apparatus according to claim 1 wherein said radiant heating means is provided with means for controlling the voltage thereto responsive to the temperature of said substrate, and said apparatus further comprises a plurality of temperature detecting means in operative communication with the area of said supporting means for detecting the temperature of said substrate supported thereby at a plurality of corresponding sites with said plurality of temperature detecting means being connected in parallel for providing an average substrate temperature to said controlling means.
Claim 7
Dependent Claim
57 words
Apparatus according to claim 1, wherein said cathode has a sputtering surface that is elongated having a length greater than one dimension of a substrate receiving portion of said substrate supporting means; said apparatus further comprising means for reciprocating said cathode in a direction transverse to its length with said sputtering surface facing said substrate supporting means.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |