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March 2017

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From:
Robert Kondner <[log in to unmask]>
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Date:
Mon, 20 Mar 2017 12:05:30 -0400
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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



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-----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.

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