Hello everybody,

I would like to spin-coat thick layers (10 mu or more) of PMMA in a single
shot. According to the data from Microchem
http://www.microchem.com/products/pdf/PMMA_Data_Sheet.pdf only about 5
micron thick layers can be achieved with 10% solution of 950PMMA in anisole
or chlorbenzene. Is it possible to order undissolved PMMA of proper
molecular weight (950K) in a form of powder, make more concentrated solution
(20 or 30%) and consequently spin-coat thicker layers?
Secondly I am looking for one-side polished, 100, 2" Silicon wafers -
economy option. Any recommendation would be highly appreciated.
Thanks,

Jure Simcic