Homebrew PCBs

In a message dated 12/23/2005 8:35:42 A.M. Central Standard Time,  
lcdpublishing@... writes:

Just a  thought on this subject, perhpas there is something there 
that is  useful


Sadly, there is a "thing" in there that makes the liquid spin,  usually a 
magnet in a fuzed-shut glass tube or a molded over (teflon?) jacket,  etc.   
Would NOT be useful around a vertical, flat, being-etched  PCB.  
 
Too bad the etchants are such nasty liquids, as the best way  would be a pump 
that sprays from many tiny holes in a straight line, so the  liquid would 
rinse down both faces of the board, being continuously mixed until  depleted, so 
always the same etch-rate, all over, until done.  But  selection/paying-for a 
pump that will handle the nasties with acceptably-little  maintenance is SUCH 
a drag!  The bubbling idea is second-best, but getting  the holes in the 
"pipe" and air-pressure just right for consistently-sized  and/or ideal 
quantities/second bubbles is SUCH a variable hassle!  
 
Centrifuge.        JRR


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