Has anyone made a study on how to clean the UV exposure unit's reflectors
in particular on non-collimated + soldermask exposure machines ?
What to do / not do, frequency of cleaning, pros and cons..
- From what we can see, some people are using alcohol iso to clean, but
is it a good solution ? Won't it remove natural protection and enhance
oxydation ?
- Isn't it more suitable to polish, if so with which product ?
We are very concerned because exposure time for Probimer 52 is rather
long (over 120 seconds) on two BASF 60/75 (Probimer 330) and PEPR 2400
(ED Resist) on a PC-130 and a BASF 60/75 using Gallium lamps.

Thank you in advance
Regards, Roland


Roland Jaquet         Technical Director
Henri Jaquet SA       PCB manufacturer
Geneva Switzerland    Prototypes and small qties
tel. xx41-22-794-7878 fx. xx41-22-794-3052
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