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Thu, 15 Nov 2001 10:57:33 EST |
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Etch conditions for Kovar are pretty much the same as Copper with Ferric
Chloride.
A lot of the small houses etch Iron based alloys first with Ferric Chloride,
then finish up etching Copper.
Usually you use 40+ Baume' Ferric Chloride, and the key issue is watching the
HCl, you keep it low to give you good "etch ratios", and higher to increase
speed.
Rudy Sedlak
RD Chemical Company
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