recently paul said that if you are using alkaline etching your can not
produce fineline ( < 6 mil).almost all alkaline etching solution suppliers
claim that their replenisher is formulated for fine lines and can be used
for etching inner layers ( print & etch ) using dryfilm as etch resist. Even
all recycling etch manufactuerers claim that their ammonical recycling
etching systems are being used for producing fineline innerlayers. any
feedback / discussion will be appreciated.
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