Hi, sounds to me like the old jet pumice scrubbing, and yes, by some stretch
you can picture this a sandblasting. Not sure how widely used this is these
days but it sure does a good job.

Wolfgang

----- Original Message -----
From: "Ivanoe Pedruzzi" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, September 06, 2005 9:34 AM
Subject: [TN] Sand blasting pcb after copper etching


> Dear Technetters,
>
> I'm not familiar with the process of making pcb and I would like to
> have your comments on something I was told from a pcb maker
> representative.
>
> "...in order to ensure a well insulation between traces, we do
> sandblasting (very little and tiny) pcb's after etching.
> this is to remove the bonding material that remains on the board after
> removing the copper. This is the only way to achieve a very good SIR
> result."
>
> Is this a normal procedure, was he correct in his claim?
>
>
> Thanks,
> Ivanoe Pedruzzi
>
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