Dummy wafers from glass are available clear or coated in sizes from 2" to 300 mm. meeting SEMI specifications to simulate Silicon wafers. These dummy wafers are a low cost alternative to expensive Silicon wafers for testing equipment.
With the advent of 300 mm Silicon wafer technology, a need has arisen for Silicon wafer substitutes. Valley Design took the initiative many years ago by introducing Glass and Ceramic wafers made to SEMI specifications.
The usual glass for this purpose is Soda Lime or Borosilicate. When temperature is involved, Borosilicate withstands higher temperatures. Valley Design offers a full line of different glasses and even Quartz or Ceramic material for this application.
Thickness can range from 0.005 inches to several millimeters. Edges are ground and beveled, and an indexing notch is optional.
| Sales and Customer Service | Corporate Headquarters | |
| Valley Design West | Valley Design East | |
| 151-D Harvey West Blvd. |
 |
Two Shaker Road, Bldg. E-001 |
| Santa Cruz, CA 95060 | Shirley, MA 01464 | |
| West E-mail: west@valleydesign.com | East E-mail: east@valleydesign.com | |
| Phone: 831-420-0595 | Phone: 978-425-3030 | |
| Fax: 831-420-0592 | Fax: 978-425-3031 | |
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Last updated: 11 January 2006 |