The black wax used for protection in
KOH etch is called 'Apiezon Wax W'.
Vendors are:
1. Scientific Instrument services
(908) 788-5550 -phone
Apiezon Wax (APW) - $102 a box
2. VWR
1-800-932-5000 -phone
Apiezon Wax W - $106 a box
Hope this helps.
Thanks to everybody who responded!!
******************************
Kavita Chandra
MEMS Design Engineer
Wilcoxon Research Inc.
(301) 216-3032 -voice
(301) 330-8873 -Fax