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Richard Doornbos Phones & Addresses

  • 7965 Bussa Ln, Rapid City, MI 49676
  • Clarksville, TN
  • 279 Lake St, Cadillac, MI 49601 (231) 779-4085
  • Midland, MI
  • 2578 N Tamarack Dr, Midland, MI 48642 (989) 832-7723

Work

Position: Professional/Technical

Education

Degree: Associate degree or higher

Public records

Vehicle Records

Richard Doornbos

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Address:
2578 N Tamarack Dr, Midland, MI 48642
VIN:
JN1CV6AR7AM251254
Make:
INFINITI
Model:
G37 SEDAN
Year:
2010

Business Records

Name / Title
Company / Classification
Phones & Addresses
Richard Doornbos
Principal
Hemlock Semiconductor, LLC
Mfg Mircochips · Mfg Misc Industry Machinery · Nonclassifiable Establishments
2200 Salzburg St, Midland, MI 48640
3500 Jim Johnson Rd, Clarksville, TN 37040
(931) 920-7500

Publications

Us Patents

Purification Of Chlorosilanes

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US Patent:
47132302, Dec 15, 1987
Filed:
Aug 13, 1984
Appl. No.:
6/640226
Inventors:
Richard S. Doornbos - Midland MI
Assignee:
Dow Corning Corporation - Midland MI
International Classification:
C01B 3308
C01B 33107
US Classification:
423341
Abstract:
Chlorosilanes contaminated with boron-containing impurities can be purified by passing the chlorosilane vapor through a silica fixed bed. Normally the boron level in trichlorosilane is reduced by about 90-99+% by the use of this process. The capacities of the silica columns for the purification of trichlorosilane generally are in the range of 1500-2000 pounds trichlorosilane per pound of silica. The purified chlorosilane is particularly well suited for the production of polycrystalline silicon. Polycrystalline silicon containing 0. 03 ppba (parts per billion atomic) has been prepared from trichlorosilane purified with this process.
Richard S Doornbos from Rapid City, MI, age ~68 Get Report