>>Hmmm, I have a picture online of my exposing unit which is a ScannerThe picture maybe does not show it clearly, but the tubes there are
>>housing with UV tubes built in. The picture showes the opened unit and
>>there you can see that the tubes are relatively close too....
>
>Similar to mine, except you have *lots* more tubes and mine is made
>(crudely) from MDF. 8-)
>
>My tubes (I only have 2) are about 13.5 cms from the glass and about 10 cms
>apart. Exposure is 13 minutes. I keep meaning to add a third tube in the
>middle and use curved reflectors and a sort of grid for collimation.
farily close to the glass. I'm not at home at the moment to measure,
but out of my memory I'd say it's around 4 cm. Exposure time with the
precoated material (I asume something similar to what you use) is 90
seconds.
I could get the scanner housing for cheap from a loca dealer (was a
scanner where the software and docs got lost). The tubes are from a
Braun face browner unit.
Since I soon will have my plating trhough station ready I will switch
to photo resist ( I have it already ) and I was told that by using it
exposure time dropps significantly and becomes much less critical also
- well, let's see...
Markus