In regard to the tape needs, check out http://www.ppi.ie for high temp
masking tapes and custom cutting.

Mike McMonagle
PCA Process Engineering Supervisor
K*Tec Electronics
1111 Gillingham Lane
Sugar Land, TX  77478
(281) 243-5639 Phone
(281) 243-5539 Fax
[log in to unmask]

> -----Original Message-----
> From: Matthew Lamkin [SMTP:[log in to unmask]]
> Sent: Thursday, September 02, 1999 4:42 AM
> To:   [log in to unmask]
> Subject:      [TN] Conformal coating machines etc ?
>
> Hi there everyone,
>
> THE SITUATION:
> We manufacture several different panels of Mixed/SMT PCB's, each with a
> couple of assembly variants.
> The general panel size is about 300mmx220mm
>
> We dip coat our boards for environmental protection.
> Our volumes are not in the millions, but can reach 10k panels per board
> P.A.
> We use QUAD P&P machines & a reflow oven.
>
> We currently have to mask both sides of the mounting holes for a lot as
> they are used as electrical connections too.
> This is done with manually applied peelable resist which has to cure
> for a few hours before use, and/or Kapton tape which
> is rather expensive.
>
> We have some boards with peelable resist screened on the non SMT side by
> our board FAB, providing that it does not interfere
> with the application of solder paste (I.E. panel remains level etc.).
>
> THE QUESTIONS:
>
> However, all the above does take a considerable amount of labor time etc
> to do, so what I would like to know is would
> we benefit from one of those machines that spray the coating on, missing
> pre-defined areas etc ?
>
> Also in what region does a secondhand one cost?
> and what models should we be on the lookout for ?
>
> Can using one of these machines provide the same (or better) protection
> level that dipping the boards get?
>
> What saving could we make in using one?
>
> Also (to our UK Technetters) can anyone recommend a supplier of reflow
> temp resistant tapes or dots etc, perhaps a tape
> that is pre-cut to particular shapes ? I know that I can get Kapton tape
> from Farnell but its rather dear..
>
> Many thanks - Matthew Lamkin
> Printed Circuitboard Draughtsman
> Protec Hse, Churchill way,
> Nelson, Lancashire.
> England UK.
> Email [log in to unmask]
>
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