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???
02/16/07 21:20
Modified:
  02/16/07 21:20
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 		 #133145 - Elusive truths ...
Responding to: ???'s previous message
Other factors easily overlooked include

(1) dimensional tolerances on produced film, whether positive or negative. These may differ between the two axes.

(2) thermally induced dimensional variation between beginning and end of exposure

(3) diffusion of light around film image during exposure

(4) age and purity of processing chemical components

(6) temperature control during board processing

(7) uniformity of agitation of chemicals during board processing

... among others.

RE




List of 42 messages in thread
TopicAuthorDate
My 8051 project failed. Help me recover please.            01/01/70 00:00      
   Wrong questions            01/01/70 00:00      
      omg            01/01/70 00:00      
         You\'re looking in the wrong place            01/01/70 00:00      
            I explain            01/01/70 00:00      
   under-/overexposure?            01/01/70 00:00      
   Test exposure            01/01/70 00:00      
      Nice...            01/01/70 00:00      
   Developer            01/01/70 00:00      
      If you're using software ...            01/01/70 00:00      
         answer            01/01/70 00:00      
            How do you transfer your image to the board?            01/01/70 00:00      
               done            01/01/70 00:00      
                  Just how do you know that?            01/01/70 00:00      
                     answer            01/01/70 00:00      
                        You need to examine it with a microscope.            01/01/70 00:00      
                        Been there done that.            01/01/70 00:00      
      Hypering ?            01/01/70 00:00      
         hypering            01/01/70 00:00      
            Future is...dark ?            01/01/70 00:00      
   Press-N-Peel            01/01/70 00:00      
      Maybe...            01/01/70 00:00      
      nah            01/01/70 00:00      
         Iron on...            01/01/70 00:00      
            Me too...            01/01/70 00:00      
               Me Three ...            01/01/70 00:00      
                  Press-N-Pell works GREAT!            01/01/70 00:00      
                     You mean like...            01/01/70 00:00      
   ABOUT THE DISTANCE BEETWEEN 2PIN            01/01/70 00:00      
      2.5mm?            01/01/70 00:00      
         Read the score - he's wrong!            01/01/70 00:00      
      Exclusive limit            01/01/70 00:00      
         Elusive truths ...            01/01/70 00:00      
            Very true.            01/01/70 00:00      
               With one layer, well the reg problems go away            01/01/70 00:00      
         width            01/01/70 00:00      
            Port?            01/01/70 00:00      
               answer            01/01/70 00:00      
                  They are Connectors - not Ports            01/01/70 00:00      
                  FYI - Those are shell-sizes            01/01/70 00:00      
                     FYFI - It still is the standard            01/01/70 00:00      
                     The same script            01/01/70 00:00      

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