Buongiorno Lucia, I would like to introduce my company to you: Ultrasil Corporation is one the larger SOI wafers manufacturing in USA. We do thick film from 2 microns up fusion bonding 3" 100-200mm dia, ultraflat custom thickness at very competitive prices and short delivery. Also we have one the larger on line inventory for SOI and regular wafers update daily. We can ship in 24 HR. Fore more information call, fax, e-mail your request, or visit our web site at: www.ultrasil.com We are glad to assist you Best Regards, John Dancovich Ultrasil Corporation 3527 Breakwater Ave Hayward CA 94545 Phone 510-266-3700 Fax 510-266-3720 e- mail: jdancovich@ultrasil.com web: www.ultrasil.com