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Pastimes : Plastics to Oil - Pyrolysis and Secret Catalysts and Alterna -- Ignore unavailable to you. Want to Upgrade?

To: streetscraper who wrote (4841)	2/2/2011 4:44:09 PM
From: SteveF	Respond to of 53574

He's 40 so that means he was a CPU Architect in 1991 at age 20. He even used "CPU Architect" as his title when posting on message boards. John Bordynuik Guest Posts: n/a 06-11-2007, 01:09 AM Selected by John Bordynuik "Nobody I know of screens boards these days. The bare copperclad board is cleaned and roller-laminated with a dry resist. The board is sandwiched with the artwork film and exposed to UV, which sensitizes (actually polymerizes) the resist. The resist is then "developed", which removes the unpolymerized areas of resist. Then the copper is etched." I see many automotive single and double-sided board manufacturers still use silk-screening. In fact, a shop I was at a couple of weeks ago is continuing to use it on flex circuits. Screening has improved much.... P.S. I wouldn't use it - photo is better but more expensive. Regards, John Bordynuik CPU Architect JBI johnbordynuik.com electronicspoint.com