KOH etching.

[Harshal Surangalikar]

hello labmembers,

i wanted to know if anybody has worked with a common
plumber's grease kind of a material to mask a Si wafer
to do single side etching in KOH, as i was interested
by its chemically inert and temperature resistant
(180C) properties. Although i will be using a fixture
to do so, i just wanted to find out if there is an
easy way to mask a side and have the etching done on
the other.

any feedback on use of black wax would also be
helpful.

thank  you.

harshal. 

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