Re: gEDA-user: homebrew UV photoplotter for direct exposing of photo-etch-resist on laminate

[Dave McGuire <mcguire@xxxxxxxxxxxxx>]

On 6/21/10 5:27 PM, John Griessen wrote:
>>   I'm seriously considering putting together a laser plotter
>> specifically because I've never gotten good results with toner
>> transfer. :-(
> 
> Me too.  The edges of the toner of my printer are just so so.
> 
> With the resist on the copper clad laminate, this method has fewest steps
> to process.
> 
> Not sure what he meant by, "Not exactly sure, estimate around 0.2mm.
> 
> i can improve on that, by using a shadowmask though."  Is he meaning a mask
> around the laser diode output to limit its beam angle?

  Better optics and a spatial filter would help if that's the case.
Note that his unit was held together with tape.  Much of the "maker"
community has the attitude of "it's better to do something half-assed
than not at all", which I don't necessarily agree with. ;)

> What does that purple mask material look like to you all?
> Seems to be liquid applied from the imperfect edges.  Could it be dry
> film resist?

  Hmm yes, it's possible.

            -Dave

-- 
Dave McGuire
Port Charlotte, FL


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