Bob

Considering parylene is all done by batch process, pricing has a much to do
with that batch size, The largest effect on cost is the prep time. Masking
is labor time and that is costly. Parylene materials are pricey but not
outrageous. Let me know if you want more details.

Lloyd Duso
Plant Manager
Diamond-MT
(814) 535-3505
www.Diamond-mt.com

On Mon, Mar 20, 2017 at 12:05 PM, Robert Kondner <[log in to unmask]>
wrote:

> Torsten,
>
>  Do you know how thick a parylene coating is? My recollection is pretty
> thin.
>
>  So I checked, very high dielectric strength, thickness typically under 1
> mil but it can be built up further with longer processing time.
>
> Any idea wat coating with parylene cost for a small batch of boards?
>
> Thanks,
> Bob Kondner
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Torsten Hagge
> Sent: Monday, March 20, 2017 9:17 AM
> To: [log in to unmask]
> Subject: [TN] WG: [TN] Screen On Insulation
>
> Hi,
>
> cheap solution could be a 1mil kapton tape with the mention risk of air
> gaps, fine and cost expensive solution parylene HT  coating before placing
> the ferrite cores...
>
> Take care
> Torsten
>
>
>
> Best Regards
>
> KRISTRONICS GmbH
>
> Dipl.Ing. (FH) Torsten Hagge
> team leader HW development
> Gewerbegrund 5-9
> 24955 Harrislee
> Telefon +49 (0) 461 7741-624
> Telefax +49 (0) 461 7741-642
> [log in to unmask]
> www.kristronics.de
> Place of jurisdiction: Flensburg, commercial register: HRB 1433 FL
> CEO Dipl.-Ing. oec. Thormod Ohm
> VAD-Id DE 811182059
> Bank account: Deutsche Bank AG Flensburg, account 4216610, bank number
> 21570011
> IBAN: DE32 2157 0011 0421 6610 00, BIC: DEUT DE HH 215
>  Please consider the environment before printing this e-mail
>
>
>
> -----Ursprüngliche Nachricht-----
> Von: TechNet [mailto:[log in to unmask]] Im Auftrag von Robert Kondner
> Gesendet: Freitag, 17. März 2017 21:11
> An: [log in to unmask]
> Betreff: [TN] Screen On Insulation
>
> Hi,
>
>
>
> We have a PCB that turns out to require 2500VAC test for 60 seconds and we
> had some flash over on pads to vias. We also have a planar ferrite
> transformer with primary windings on one side.
>
>
>
> Does anyone know of a screen on insulation material that can be used to
> increase flash over voltages? I would like to get a 2 or 3 mils of material.
> My other option is to have a laser cut layer of isolation but that could
> leave air paths under the material.
>
>
>
> Any other ideas welcome.
>
>
>
> Thanks,
>
> Bob K.
>