An EETimes blog was printed today showing DLP in a PCB house. It appears the output of the DLP is focused, projected to the board, and scanned across the board. They make it look easy as always. "Maskless Lithography in San Jose uses DLP technology for PCB lithography machine for speed, low-cost, and reliability. Instead of using a polymer mask in contact with the PCB material, the company's digital imaging tools project the board layout directly on photo-resist materials." http://www.eetimes.com/author.asp?section_id=36 <http://www.eetimes.com/author.asp?section_id=36&doc_id=1322765&page_number= 7> &doc_id=1322765&page_number=7
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DLP for imaging photoresist
2014-06-17 by Jeff Heiss