| Re: Affordable Parts Online [message #80549 is a reply to message #78060] |
Mon, 22 September 2014 07:46   |
emmagia
Messages: 1
Registered: September 2014
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What is newer is the CAD software used to deliver the artwork to the board house. It used to be done photographically, and your layout engineer would "lay tape". Literally. They used strips of colored translucent tape fastened to large clear sheets of plastic, one per layer. They often used different colored tape so when each layer was laid on top of each other, you could see the layers easily by color coding. But this was just for convenience while developing and checking the layout, because the final product of the layout engineer is a photographic positive done in black on clear at scale for each layer requested.
emma
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