US4834857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Neutral sputtered films of metal alloy oxides
Assignee: PPG Industries Ohio Inc
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Filing: 1988-04-01
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Granted: 1989-05-30
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Expires: 2008-04-01
Abstract
Abstract A method for producing visually neutral high transmittance low emissivity coated articles comprising infrared reflective metal and antireflective metal oxide layers and an improved multiple layer coated article produced thereby, comprising a high refractive index neutral metal oxide layer between the antireflective metal oxide layer and the infrared reflective metal layer are disclosed.
Inventors
- 👤 F. Howard Gillery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:02
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; G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/113; G02B1/115; G02B1/116; G02B1/16; C03C2217/00; C03C2217/70; C03C2217/73; C03C2217/734; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12597
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
113 words
A method for depositing a visually neutral, high transmittance, low emissivity film, comprising the steps of: a. sputtering a metal cathode target in a reactive atmosphere comprising oxygen thereby depositing a transparent antireflective metal oxide film having a refractive index of about 2.0 on a surface of a transparent substrate; b. sputtering a transparent neutral metal oxide layer having a refractive index greater than 2.0 over said antireflective metal oxide film; c. sputtering a transparent infrared reflective metallic film over said neutral metal oxide layer; d. sputtering a transparent neutral metal layer over said infrared reflective metallic film; and e. sputtering a second transparent antireflective metal oxide film over said neutral metal layer.
Claim 2
Independent Claim
113 words
A method for depositing a visually neutral, high transmittance, low emissivity film, comprising the steps of: a. sputtering a metal cathode target in a reactive atmosphere comprising oxygen thereby depositing a transparent antireflective metal oxide film having a refractive index of about 2.0 on a surface of a transparent substrate; b. sputtering a transparent neutral metal oxide layer having a refractive index greater than 2.0 over said antireflective metal oxide film; c. sputtering a transparent infrared reflective metallic film over said neutral metal oxide layer; d. sputtering a transparent neutral metal layer over said infrared reflective metallic film; and e. sputtering a second transparent antireflective metal oxide film over said neutral metal layer.
Claim 3
Dependent Claim
24 words
A method according to claim 1, wherein said neutral metal oxide layer is selected from the group consisting of titanium oxide and zirconium oxide.
Claim 4
Dependent Claim
11 words
A method according to claim 2, wherein said substrate is glass.
Claim 5
Dependent Claim
21 words
A method according to claim 3, wherein said antireflective metal oxide films comprise an oxide reaction product comprising zinc and tin.
Claim 6
Dependent Claim
14 words
A method according to claim 4,wherein said antireflective metal oxide films comprise zinc stannate.
Claim 7
Independent Claim
155 words
A method for making a visually neutral, multiple layer, high transmittance, 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, antireflective, zinc/tin metal alloy oxide film on a surface of said substrate; c. sputtering a titanium target in an oxidizing atmosphere to deposit a neutral titanium oxide layer on said antireflective zinc/tin oxide film; d. sputtering a silver cathode target in an inert atmosphere to deposit a transparent metallic silver film on said titanium oxide layer; e. sputtering a titanium target in an inert atmosphere to deposit a neutral titanium layer on said silver film; and f. sputtering a cathode target comprising zinc and tin in a reactive atmosphere comprising oxygen to deposit a second transparent, antireflective zinc/tin metal alloy oxide film on said titanium layer.
Claim 8
Independent Claim
155 words
A method for making a visually neutral, multiple layer, high transmittance, 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, antireflective, zinc/tin metal alloy oxide film on a surface of said substrate; c. sputtering a titanium target in an oxidizing atmosphere to deposit a neutral titanium oxide layer on said antireflective zinc/tin oxide film; d. sputtering a silver cathode target in an inert atmosphere to deposit a transparent metallic silver film on said titanium oxide layer; e. sputtering a titanium target in an inert atmosphere to deposit a neutral titanium layer on said silver film; and f. sputtering a cathode target comprising zinc and tin in a reactive atmosphere comprising oxygen to deposit a second transparent, antireflective zinc/tin metal alloy oxide film on said titanium layer.
Claim 9
Dependent Claim
11 words
The method according to claim 6, wherein the substrate is glass.
Claim 10
Dependent Claim
16 words
The method according to claim 7, wherein said metal alloy consists essentially of zinc and tin.
Claim 11
Dependent Claim
19 words
The method according to claim 8, wherein said first and second zinc/tin metal alloy oxide films comprise zinc stannate.
Claim 12
Dependent Claim
22 words
The method according to claim 6, further comprising the step of sputtering a titanium oxide overcoat on the second zinc/tin oxide film.
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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) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |