Homebrew PCBs

Its very difficult to even get that level with solder mask, so say nothing of flux. I've tried different coatings from Dupont, however our assembly techniques nullified the coatings, thus we returned to dead-bug. 

A friend in Singapore made thousands of production sensor conditioners a month, and even then had to dead bug the input circuits. At least his labor costs were low enough to make this practical.

I will keep an eye on this topic, as I'm very interested if someone has a workable solution.

Thanks
Ron
  ----- Original Message ----- 
  From: Steve 
  To: Homebrew_PCBs@yahoogroups.com 
  Sent: Monday, December 01, 2003 1:28 PM
  Subject: [Homebrew_PCBs] Low leakage coatings? Re: how can i prevent corosion?


  Does anyone here have experience and suggestions for low-leakage
  coatings? I've got some circuits in mind that in the past I've done
  dead-bug style to avoid surface leakage on a PCB. Is there a good not
  to expensive low leakage coating?

  I'm thinking of an input with an impedance in the rage of 100M to 10G.
  Yes, I even wash the parts themselves, I've been either leaving them
  uncoated or coating them with paraffin. Something I got from a book on
  static electricity machines, mix a bit of lighter fluid and wax and
  paint it on. The lighter fluid (not butane, I mean the stuff that goes
  in those old metal lighters) evaporates leaving a very thin even
  coating of wax.

  Steve


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