Chris Holden tackles attempts to laser-cut FR1- & FR2-rated PCBs into irregular shapes – the results are interesting and when things failed the reasons for failure are perhaps not what you’d expect.
…a laser can’t cut through copper. But what we though was that perhaps we could laser cut a mirror image of the shape required, from the back of the board – so if we stuck to resin-bonded-paper (rather than FR4/fibreglass) boards, we should be able to laser cut the paper into any shape.
Then, when the board is etched, and the copper laminate holding the pieces together on the front is etched away, all the individual parts come loose and swish about in the bottom of a tank of ferric chloride (quite how to retrieve them, we haven’t yet worked out).
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — Transforming Today’s Bad Jobs into Tomorrow’s Good Jobs
Wearables — Is it armor or fabric?
Electronics — With SMT, start big …
Biohacking — Four Lucid Dreaming Wearables
No comments yet.
Sorry, the comment form is closed at this time.