I've made 64 pin TQFP PCBs using UV and, photo sensitive boards. I guess for a 100 pinner, that the issue would be can the etchant get between the lines ( traces ) or would I just get a mess of partially dissolved copper all over the place between the traces ? Etchant is ferric chloride.
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Last Edited: Tue. Aug 9, 2011 - 04:06 PM