IBM has developed a polymer that can be spun upto 500um thick. This can be exposed under a regular ultraviolet light. They have a patent on it. Does anyone know the patent number or their WEB site so that I can take a look at it. Thank you, Padmaja *************************************************************** Padmaja Ramadas, Ph.D. e-mail: ramadas@ti.com Texas Instruments (972) 927-1108 (w) 13532 N. Central Expy., MS 77 Fax:(972) 995-3180 Dallas, TX 75243 ***************************************************************