Joseph Stach Phones & Addresses

  • Boalsburg, PA
  • 135 Winding Way, Haddonfield, NJ 08033
  • 180 Winding Way, Haddonfield, NJ 08033
  • State College, PA
  • Lawnside, NJ
  • Los Alamos, NM
  • Voorhees, NJ
  • Danville, VA
  • Austin, TX
  • Camden, NJ
  • PO Box 530, Boalsburg, PA 16827

Business Records

Name / Title
Company / Classification
Phones & Addresses
Joseph Stach
Mfg Radio Frequency Power Delivery Systems
1007 Laurel Oak Rd, Voorhees, NJ 08043
(856) 627-1287
Joseph Stach
Plasma-Therm, Inc
136 Rte 73, Echelon, NJ 08043


Us Patents

Apparatus For Matching A Variable Load Impedance With An Rf Power Generator Impedance

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US Patent:
56546793, Aug 5, 1997
Jun 13, 1996
Appl. No.:
Anton Mavretic - Marlton NJ
Andrew Ciszek - Maple Shade NJ
Joseph Stach - Medford NJ
RF Power Products, Inc. - Voorhees NJ
International Classification:
H03H 740
US Classification:
333 173
An apparatus for matching the variable impedance of a load with the fixed impedance of a radio frequency (RF) power generator to provide maximum power transfer. The impedance matching network further allows an RF power generator to vary the frequency of the voltage applied to a load, e. g. , a plasma chamber as may be utilized in semiconductor or flat panel plasma display manufacturing processes. The impedance matching network further utilizes fixed solid state components to adjust the impedance of the attached load to provide maximum power transfer between the generator and the load. A parallel switched capacitor network is controlled by an electrical switching means such as PIN diodes to turn fixed capacitors on or off. A means for varying the frequency of the applied voltage is used to match the impedance of the load with the impedance of the RF power generator within milliseconds.

Cantilevered Boat-Free Semiconductor Wafer Handling System

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US Patent:
45183490, May 21, 1985
Dec 1, 1983
Appl. No.:
Richard E. Tressler - Julian PA
Joseph Stach - State College PA
Roger L. Baeten - State College PA
Better Semiconductor Processes (BSP) - State College PA
International Classification:
F27D 300
F27D 500
F27B 904
F27B 914
US Classification:
432 11
An improved semiconductor wafer handling system completely eliminates the need for boats, sleds, paddles, wheeled carriers, etc. , customarily employed in transporting wafers during heat processing through the use of a plurality of rigid, polished cantilevered rods having a multiplicity of spaced slots for cooperatively holding wafers in an upright position. The system provides a means for achieving higher production yields of such semiconductor elements by generating fewer contaminating particles and through less exposure to ambient environment.
Joseph S Stach from Boalsburg, PA, age ~85 Get Report