Heres the theory .......

While browsing some other forums I came across someone who stripped a dvd recorder and found the laser head could put out around 250mw of power - enough to melt plastic/burn paper. Further investigation showed these laser diodes are good for between 80mw and 250mw output depending on the dvd burner.

The optics on these allow a fine focus

If photoresist boards can be "influenced" by these high powered lasers then it could be a cheapish way of "printing" directly onto PCBs.

Thoughts are to either have a rotary indexed table or maybe reverse engineer a cheap laser printer and pass the board through using the printer optics to raster print the image onto the board.

Anyone know what happens to photoresist under a moderate power laser beam ?

Dom
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