Imaging method for manufacture of microdevices Grant US-6084655-A United States of America 04 Jul 2000
Photolithography mask using serifs and method thereof Grant US-5707765-A United States of America 13 Jan 1998
Phase shifting mask structure with multilayer optical coating for improved transmission Grant US-5472811-A United States of America 05 Dec 1995
Method of fabricating phase shifters with absorbing/attenuating sidewalls using an… Grant US-5418095-A United States of America 23 May 1995