8" gold-plated wafer.
Pure gold plated silicon water. Not sure why, but if I had to guess I'd say it has something to do with reflecting infrared light. Source:eBay seller a1-89 Contributor:Theodore Gray Acquired:2 February, 2008 Text Updated:23 February, 2008 Price: $41 Size: 8" Purity: >99.99999%