Homebrew PCBs

Yes that's exactly true Markus. Although this particular PCB was single 
sided and was pre drilled only because of convention.

I only tried hot roll lamination once and having discovered the problems 
of handling this film I looked at using wet lamination. I discovered 
this method was possible and so I investigated and experimented. The 
thing I like about it is the utilisation of water to wash away 
particles. Its also difficult peeling away the film and not letting the 
photoresist touch itself, because when it does you can't release it and 
it useless.
You obviously had spent the time and achieved much more success and than 
me with hot lamination. I'd be interested in seeing photos.

Is your typewriter paper on the copper side of the PCB before it goes 
into the laminator ?  I envisioned you used the paper to temporarily 
separate the dry film photoresist and the copper surface prior to hot 
roll lamination. Once the start of the PCB and photoresist film have 
entered the rollers the paper was dragged out at same rate as the 
rollers thus leaving a small distance where the photoresist and copper 
are in close contact, but not long enough to take adhesion.

Adam

Markus Zingg wrote:
> I could be wrong, but the way his board looks, and from what I know from 
> Adams past postings to this group, it seems to be through plated. There 
> you obviousely must drill bevor you plate and then expose, developp, 
> etch etc etc.
> 
> Markus
> 
> DJ Delorie schrieb:
>>
>> Thanks for the tutorial! I noticed your board is pre-drilled... do
>> you always drill first? Any tips there? I usually used the etched
>> dimple as a drill guide.
>>
>>  
> 
>