Fine line printed circuit design by Robert Tarzwell & Robert Tarzwell
Author:Robert Tarzwell & Robert Tarzwell [Tarzwell, Robert]
Language: eng
Format: azw3
Published: 2017-05-02T04:00:00+00:00
The silver coating on polyester film has small pin holes in the surface creating possible opens or shorts. The finer resolution but more expensive sputtered chrome on glass is a significantly thinner coating but offers a completely pin hole free surface. The manufacturing method of laser exposed photo tools produces a side effect of laser splatter. It is impossible to not have some reflection of the laser as it hits the surface. These reflected light beams can cause small dots alongside the main line edge, reducing the accuracy of the subsequent exposure. The laser transport system has large enough bumps in the table or laser system to generate and transfer small dips and bumps to the line edge. Angled lines also create irregular edge features when the laser has to switch between raster draws to create the angled line.
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