US4806220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making low emissivity film for high temperature processing
Assignee: PPG Industries Ohio Inc
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Filing: 1986-12-29
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Granted: 1989-02-21
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Expires: 2006-12-29
Abstract
Abstract A multiple-layer, high transmittance, low emissivity coated article which can be subjected to high temperature processing such as bending, annealing, tempering, laminating or glass welding as a result of titanium-containing primer layers is disclosed.
Inventors
- 👤 James J. Finley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:43
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/3602; C03C17/3618; C03C17/3644; C03C17/3652; C03C17/3657; C03C17/366; C03C17/3681; C03C17/3689
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
A method for making a high transmittance, high-temperature resistant film comprising the steps of: a. sputtering a metal cathode target in a reactive atmosphere comprising oxygen thereby depositing a first metal oxide film on a surface of a substrate; b. sputtering a metal-containing primer layer over said metal oxide layer; c. sputtering a reflective metallic film over said metal-containing primer layer; d. sputtering a second metal-containing primer layer over said reflective metallic film; e. sputtering a second metal oxide film over said second primer layer thereby producing a coated article with a visible transmittance lower than the desired visible transmittance of the final product; and f. heating said coated article to a sufficient temperature for a sufficient time to increase the visible transmittance of said high-temperature resistant film.
Claim 2
Independent Claim
128 words
A method for making a high transmittance, high-temperature resistant film comprising the steps of: a. sputtering a metal cathode target in a reactive atmosphere comprising oxygen thereby depositing a first metal oxide film on a surface of a substrate; b. sputtering a metal-containing primer layer over said metal oxide layer; c. sputtering a reflective metallic film over said metal-containing primer layer; d. sputtering a second metal-containing primer layer over said reflective metallic film; e. sputtering a second metal oxide film over said second primer layer thereby producing a coated article with a visible transmittance lower than the desired visible transmittance of the final product; and f. heating said coated article to a sufficient temperature for a sufficient time to increase the visible transmittance of said high-temperature resistant film.
Claim 3
Dependent Claim
12 words
A method according to claim 1, wherein said primer layer comprises titanium.
Claim 4
Dependent Claim
11 words
A method according to claim 2, wherein said substrate is glass.
Claim 5
Dependent Claim
23 words
A method according to claim 3, wherein said metal oxide film comprises an oxide reaction product of an alloy comprising zinc and tin.
Claim 6
Dependent Claim
22 words
A method according to claim 1, further comprising the step of depositing a protective metal-containing overcoat over said second metal oxide film.
Claim 7
Independent Claim
174 words
A method for making a multiple layer low emissivity coated product comprising the steps of: a. placing a transparent, nonmetallic substrate in a sputtering chamber; b. sputtering a cathode target comprising zinc and tin in a reactive atmosphere comprising oxygen to deposit a first transparent zinc/tin oxide film on a surface of said substrate; c. sputtering a titanium target to deposit a primer layer on said oxide film; d. sputtering a silver cathode target in an inert atmosphere to deposit a transparent silver film on said primer layer; e. sputtering a titanium target to deposit a second primer layer on said silver film; f. sputtering a cathode target comprising zinc and tin in a reactive atmosphere comprising oxygen to deposit a second zinc/tin oxide film on said second primer layer; thereby producing a coated article with a visible transmittance lower than the desired visible transmittance of the coated article; and g. heating said coated article at a sufficient temperature for a sufficient time to increase the visible transmittance of said low emissivity coated product.
Claim 8
Independent Claim
174 words
A method for making a multiple layer low emissivity coated product comprising the steps of: a. placing a transparent, nonmetallic substrate in a sputtering chamber; b. sputtering a cathode target comprising zinc and tin in a reactive atmosphere comprising oxygen to deposit a first transparent zinc/tin oxide film on a surface of said substrate; c. sputtering a titanium target to deposit a primer layer on said oxide film; d. sputtering a silver cathode target in an inert atmosphere to deposit a transparent silver film on said primer layer; e. sputtering a titanium target to deposit a second primer layer on said silver film; f. sputtering a cathode target comprising zinc and tin in a reactive atmosphere comprising oxygen to deposit a second zinc/tin oxide film on said second primer layer; thereby producing a coated article with a visible transmittance lower than the desired visible transmittance of the coated article; and g. heating said coated article at a sufficient temperature for a sufficient time to increase the visible transmittance of said low emissivity coated product.
Claim 9
Dependent Claim
11 words
The method according to claim 6, wherein the substrate is glass.
Claim 10
Dependent Claim
23 words
The method according to claim 7, further comprising the step of depositing a metal-containing protective coating over said second metal alloy oxide film.
Claim 11
Dependent Claim
47 words
The method according to claim 6, wherein the step of heating the coated article at a sufficient temperature for a sufficient time whereby the transmittance of the coated article increases is further carried out at a sufficient temperature for a sufficient time such that the emissivity decreases.
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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) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |