Homebrew PCBs

adicont2 wrote:

>A simple wedge shape to force 
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>>the bubbles back against the board as they try to spread out as they 
>>rise is all that's needed.  Easy to linearize the swing, and with 
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>the 
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>>edge of the board not holding the bubbles in place as well, non-
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>linear a 
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>>bit may actually be better.
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>Sorry, I'm affraid I dont understand... A "wedge shape"...
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   Think of looking at the edge of the vertical standing board as a 
line, and put another board over to the side, with the top tilted to the 
board you're etching.  Forces the bubbles back towards the board, get 
the distance and tilt right and it should get the etching to almost 
exactly even..  Bubbles spread out as well as going up, a wedge on 
either side would correct most of it by forcing them back to the 
board..  Would look about like this from one end:

  / | \
 /o|o\
/ o|o  \
  o o


  But while I consider this something to design out very soon just to 
see exactly how well I can make it work, I have boards to finish cutting 
out and make first..

Alan