Fred Penzetta Phones & Addresses
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278 Noxon Rd, Poughkeepsie, NY 12603 (845) 297-9642
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24 Beatty Rd, Wappingers Falls, NY 12590 (845) 297-9642 (518) 891-3687
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28 Beatty Rd, Wappingers Falls, NY 12590 (845) 297-9642
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Hopewell Junction, NY
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Fishkill, NY
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Wappingers Fl, NY
Publications
Us Patents
Low Shock Transmissive Antechamber Seal Mechanisms For Vacuum Chamber Type Semi-Conductor Wafer Electron Beam Writing Apparatus
View pageUS Patent:
43559379, Oct 26, 1982
Filed:
Dec 24, 1980
Appl. No.:
6/219657
Inventors:
Alfred Mack - Poughkeepsie NY
Brian C. O'Neill - Millbrook NY
Fred L. Penzetta - Wappingers Falls NY
Brian C. O'Neill - Millbrook NY
Fred L. Penzetta - Wappingers Falls NY
Assignee:
International Business Machines Corporation - Armonk NY
International Classification:
C23C 1308
US Classification:
414217
Abstract:
An electron beam vacuum chamber is provided with an elevator mechanism within the chamber including a platform closing off an opening within a horizontal vacuum chamber wall and separating the vacuum chamber from an overlying antechamber partially defined by a vertically displaceable lid overlying the opening and moving towards and away from the opening. Resilient peripheral seals are fixed to the lid facing the chamber wall and the elevator platform. A coil spring partially compressible upon contact with the first peripheral seal carried by the lid with the face of the vacuum chamber wall forms a first mechanical override and an annular spring metal diaphragm fixedly mounted about its outer peripheral edge to the vacuum chamber adjacent the opening has its inner peripheral edge freely flexible and is contacted by the resilient peripheral seal of the platform to form a second mechanical override.