Homebrew PCBs

----- Original Message ----- 
From: "Steve" <alienrelics@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Monday, December 01, 2003 6:28 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.

Have you used 'guard ring' techniques and Teflon standoffs?

Leon