Siddharth, There are several MEMS companies that may provide aligned wafer bond service. Be prepared ... Unless they have a microscope that will allow for ISA (inner substrate alignment) at lease one of your substrates will require a pattern on the backside that is referenced to the opposite (bond) side. You may want to contact IntelliSense 16 Upton Drive Wilmington, MA 01887 978-988-8000 www.intellis.com Standard MEMS 80 Arkay Drive Happauge, NY 11788 516 435-6381 www.smsc.com Regards, Joe Brown MEMS Karl Suss America jbrown@suss.com 802-244-5181X250 802-244-5103 Fax