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US4516527A Expired / Lapsed US ⏱️ 0.0 years remaining

Photochemical vapor deposition apparatus

Assignee: Ushio Denki KK
•
Filing: 1983-12-29
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Granted: 1985-05-14
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Expires: 2003-12-29
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Abstract

Abstract In a photochemical vapor deposition apparatus, a reaction space forming a passage for a photoreactive gas, in which reaction space a substrate is to be placed, and a discharge space, in which electric plasma discharge is generated for radiating ultraviolet rays which cause photochemical reaction of the photoreactive gas, are surrounded by the same vessel. A mercury reservoir that communicates with the discharge space by way of a communication pipe is provided outside the vessel, the communication pipe is heated at a temperature higher than that of the mercury reservoir by a heater, and the mercury reservoir is controlled in temperature by a Peltier effect element which may be cooled with a water-cooled block provided on one side thereof. This photochemical vapor deposition apparatus can achieve photochemical vapor deposition with high efficiency, because the control of the vapor pressure of mercury for discharge is carried out easily and ultraviolet rays can be radiated with high efficiency.

Inventors

  • 👤 Shinji Sugioka

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 11:54
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/44; C23C16/48; C23C16/482; F; F25; F25B; F25B21/00; F25B21/02

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 112 words
A photochemical vapor deposition apparatus comprising: means, including a vessel, for defining a reaction space in which the photochemical vapor deposition occurs and a discharge space in which electric plasma discharge is generated, said reaction space forming a passage for a photoreactive gas, and said electric plasma being generated for radiating ultraviolet rays which cause a photochemical reaction of said photoreactive gas; a mercury reservoir outside said vessel and in communication with the discharge space by way of a communication pipe; means heating said communication pipe to a temperature higher than the temperature of the mercury reservoir; and means, including a Peltier effect element, for controlling the temperature of the mercury reservoir.
Claim 2
Dependent Claim 112 words
A photochemical vapor deposition apparatus comprising: means, including a vessel, for defining a reaction space in which the photochemical vapor deposition occurs and a discharge space in which electric plasma discharge is generated, said reaction space forming a passage for a photoreactive gas, and said electric plasma being generated for radiating ultraviolet rays which cause a photochemical reaction of said photoreactive gas; a mercury reservoir outside said vessel and in communication with the discharge space by way of a communication pipe; means heating said communication pipe to a temperature higher than the temperature of the mercury reservoir; and means, including a Peltier effect element, for controlling the temperature of the mercury reservoir.
Claim 3
Dependent Claim 31 words
A photochemical vapor deposition apparatus as set forth in claim 1, in which a water-cooled block is provided in contact with one side of the Peltier effect element for cooling thereof.
Claim 4
Dependent Claim 96 words
A photochemical vapor deposition apparatus comprising: means, including a vessel, for defining a reaction space in which the photochemical vapor deposition occurs and a discharge space in which electric plasma discharge is generated, said reaction space forming a passage for a photoreactive gas, and said electric plasma being generated for radiating ultraviolet rays which cause a photochemical reaction of said photoreactive gas; a mercury reservoir outside said vessel and in communication with the discharge space by way of a communication pipe; and means, including a Peltier effect element, for controlling the temperature of the mercury reservoir.
Claim 5
Dependent Claim 96 words
A photochemical vapor deposition apparatus comprising: means, including a vessel, for defining a reaction space in which the photochemical vapor deposition occurs and a discharge space in which electric plasma discharge is generated, said reaction space forming a passage for a photoreactive gas, and said electric plasma being generated for radiating ultraviolet rays which cause a photochemical reaction of said photoreactive gas; a mercury reservoir outside said vessel and in communication with the discharge space by way of a communication pipe; and means, including a Peltier effect element, for controlling the temperature of the mercury reservoir.

References Cited (Backward Citations)

US3310424A Cited
US3619283A Cited
US3971968A Cited
US4265932A Cited
US4454835A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-05-13 1988-11-12 1989-05-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-05-13 1992-11-12 1993-05-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-05-13 1996-11-12 1997-05-14 $7700.00 Window Closed / Lapsed

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