Homebrew PCBs

----- Original Message ----- 
From: richanny@... 
To: Homebrew_PCBs@yahoogroups.com 
Sent: Friday, January 10, 2014 9:44 AM
Subject: [Homebrew_PCBs] Stubborn ferric chloride etching.


  
Using plain hydrated ferric chloride etch, warmed up a little, the last two boards done have been really stubborn to etch away the bridges between narrow tracks and pads. They needed extended time , so much that some narrow tracks just disappeared under the resist, and the boards scrapped.


Any suggestions?
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Try a fish-tank air-pump to aggitate the solution.

geoff
.