US4584206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical vapor deposition of a reflective film on the bottom surface of a float glass ribbon
Assignee: PPG Industries Inc
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Filing: 1984-07-30
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Granted: 1986-04-22
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Expires: 2004-07-30
Abstract
Abstract A method and apparatus are disclosed for depositing a metal-containing film on the bottom surface of a glass ribbon by chemical vapor deposition whereby a turbulent stream of vaporized coating reactant is delivered to the bottom surface of a glass ribbon at a sufficient temperature to cause deposition of a film on the surface, and unreacted and undeposited coating reactant and reaction by-products are immediately exhausted.
Inventors
- 👤 George E. Sleighter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:35
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/40; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/245; B; B05; B05C; B05C9/00; B05C9/04; C03C17/001; C03C17/002; C23C16/44; C23C16/54; C23C16/545; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/211; C03C2217/212; C03C2218/00; C03C2218/10; C03C2218/15; C03C2218/152
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
99 words
A method for coating a glass substrate comprising the steps of: a. maintaining said glass substrate in a substantially horizontal position; b. maintaining said glass substrate at a temperature sufficient to cause a vaporized coating reactant to react and deposit a film on the glass surface; c. vaporizing a coating reactant; d. creating turbulent flow of the vaporized coating reactant; e. delivering said vaporized coating reactant to the bottom surface of said glass substrate whereupon said reactant reacts to deposit a uniform film; and f. immediately removing unreacted and undeposited coating reactant vapor and reaction by-products through exhaust means.
Claim 2
Independent Claim
99 words
A method for coating a glass substrate comprising the steps of: a. maintaining said glass substrate in a substantially horizontal position; b. maintaining said glass substrate at a temperature sufficient to cause a vaporized coating reactant to react and deposit a film on the glass surface; c. vaporizing a coating reactant; d. creating turbulent flow of the vaporized coating reactant; e. delivering said vaporized coating reactant to the bottom surface of said glass substrate whereupon said reactant reacts to deposit a uniform film; and f. immediately removing unreacted and undeposited coating reactant vapor and reaction by-products through exhaust means.
Claim 3
Dependent Claim
15 words
The method according to claim 1, wherein said glass is coated with a metal-containing film.
Claim 4
Dependent Claim
16 words
The method according to claim 2, wherein said glass is coated with a metal oxide film.
Claim 5
Dependent Claim
14 words
The method according to claim 3, wherein said coating reactant is an organometallic compound.
Claim 6
Dependent Claim
20 words
The method according to claim 4, wherein said coating reactant is vaporized by mixing and heating with a carrier gas.
Claim 7
Dependent Claim
12 words
The method according to claim 5, wherein said carrier gas comprises air.
Claim 8
Dependent Claim
16 words
The method according to claim 6, wherein said glass is coated with a tin oxide film.
Claim 9
Dependent Claim
14 words
The method according to claim 7, wherein said organometallic coating reactant is monobutyltin trichloride.
Claim 10
Dependent Claim
21 words
The method according to claim 8, wherein said monobutyltin trichloride is dissolved in a solvent, and the resultant solution is vaporized.
Claim 11
Dependent Claim
23 words
The method according to claim 9, wherein said solvent is selected from the group consisting of methylene chloride, trichloroethylene, perchloroethylene and mixtures thereof.
Claim 12
Independent Claim
102 words
An apparatus for depositing a film on a surface of a substrate comprising: a. means for vaporizing a coating reactant; b. means for delivering said vaporized coating reactant to said substrate surface, said means comprising a nozzle having a slot-shaped orifice substantially as long as the parallel dimension of the substrate to be coated and capable of creating turbulent flow; and c. exhaust means adjacent said nozzle and extending substantially completely along the length of said nozzle wherein said nozzle and exhaust means are positioned between conveying means which support said substrate in order to coat the supported surface of said substrate.
Claim 13
Independent Claim
102 words
An apparatus for depositing a film on a surface of a substrate comprising: a. means for vaporizing a coating reactant; b. means for delivering said vaporized coating reactant to said substrate surface, said means comprising a nozzle having a slot-shaped orifice substantially as long as the parallel dimension of the substrate to be coated and capable of creating turbulent flow; and c. exhaust means adjacent said nozzle and extending substantially completely along the length of said nozzle wherein said nozzle and exhaust means are positioned between conveying means which support said substrate in order to coat the supported surface of said substrate.
Claim 14
Dependent Claim
25 words
The apparatus according to claim 11, wherein said nozzle is designed to deliver said vaporized coating reactant at a Reynolds number of at least 1700.
Claim 15
Independent Claim
138 words
A method for producing a high transmittance, low emissivity coated glass article comprising the steps of: a. conveying a glass substrate in a substantially horizontal position through a coating area; b. maintaining said glass substrate at a temperature sufficient to cause a metal-containing coating reactant to react and deposit a metal-containing film on a surface thereof; c. contacting the top surface of said glass substrate with a metal-containing coating reactant which reacts to deposit an infrared reflective metal oxide film thereon, which film exhibits a visible interference color effect in reflectance; and d. substantially simultaneously contacting the bottom surface of said glass substrate with a vaporized metal-containing coating reactant which reacts to deposit a uniform higher reflectance metal oxide film which masks the visible interference color effect of the infrared reflective metal oxide film on the top surface.
Claim 16
Independent Claim
138 words
A method for producing a high transmittance, low emissivity coated glass article comprising the steps of: a. conveying a glass substrate in a substantially horizontal position through a coating area; b. maintaining said glass substrate at a temperature sufficient to cause a metal-containing coating reactant to react and deposit a metal-containing film on a surface thereof; c. contacting the top surface of said glass substrate with a metal-containing coating reactant which reacts to deposit an infrared reflective metal oxide film thereon, which film exhibits a visible interference color effect in reflectance; and d. substantially simultaneously contacting the bottom surface of said glass substrate with a vaporized metal-containing coating reactant which reacts to deposit a uniform higher reflectance metal oxide film which masks the visible interference color effect of the infrared reflective metal oxide film on the top surface.
Claim 17
Dependent Claim
29 words
The method according to claim 13, wherein the reflective metal oxide film on the bottom glass surface is selected from the group consisting of tin oxide and titanium oxide.
Claim 18
Dependent Claim
21 words
The method according to claim 14, wherein the luminous reflectance of the bottom surface film is from 15 to 21 percent.
Claim 19
Dependent Claim
19 words
The method according to claim 15, wherein the bottom surface film is tin oxide formed from vaporized monobutyltin trichloride.
Claim 20
Dependent Claim
34 words
The method according to claim 13, wherein the top surface film is tin oxide having a surface resistivity not greater than 110 ohms per square and a luminous reflectance not greater than 12 percent.
Claim 21
Dependent Claim
23 words
The method according to claim 17, wherein the top surface tin oxide film is formed by the pyrolysis of a powder organotin compound.
Claim 22
Dependent Claim
13 words
The method according to claim 18, wherein the organotin compound is dibutyltin difluoride.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |