Hi Marty, The easiest way to accomplish this task using your single side aligner: have a foundry pattern an alignment mark on both sides of your wafers and send them back to you. You are now ready to process each side individually. -----Original Message----- From: Martin O. Patton [mailto:patton@er.com] Sent: Tuesday, February 19, 2002 9:33 AM To: mems-talk@memsnet.org Subject: [mems-talk] Is there a way to align two sides of wafer Dear Mems group, I have a single side mask aligner. Is there a method by which this aligner can be used to align features on both sides of the wafer? Thanks for your assistance. Marty Martin O. Patton Senior Research Engineer Essential Research Incorporated 6410 Eastland Road Cleveland, Ohio 44142 www.er.com (440) 816-9850 _______________________________________________ mems-talk@memsnet.org mailing list: to unsubscribe or change your list options, visit http://mail.mems-exchange.org/mailman/listinfo/mems-talk Hosted by the MEMS Exchange, providers of MEMS processing services. Visit us at http://www.mems-exchange.org/