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October 2004

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Subject:
From:
Mike Fenner <[log in to unmask]>
Reply To:
Date:
Mon, 4 Oct 2004 12:28:13 +0100
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There are opaque low viscosity epoxy coatings available for this, try the
usual culprits. Usually in security matters the whole board is coated or
potted as an anti-tamper.

For single sensitive components the usual thing is to abrade the ID off or
scribble over  with a laser. 

Field service people love all this of course.

Regards 

Mike 


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Peter Swanson
Sent: Thursday, September 30, 2004 11:48 AM
To: [log in to unmask]
Subject: [TN] Coating to protect IP


I am looking for ideas for a pcb assembly coating, the function of which is
to hide the component IDs to prevent piracy and copying. This is a
non-specific requirement which comes up from time to time.

Basic requirements:
1) Opaque - black, but could be any colour I guess
2) Fairly permanent and resistant to tampering - leads me to an epoxy type?
Anything can be removed if you try hard enough, but epoxy would be the
toughest
3) Easily applied, no special equipment - aerosol can? Brush on with fast
(thermal cure)? Single part?

There's some other factors which would be specific to particular assemblies
(thermal and electrical characteristics) of course, but I'm just looking for
something generic at the moment.

Anyone have any ideas or already use something for this purpose?
TIA,
Peter
--
--------------------------------------------------------
Peter Swanson           [log in to unmask]
INTERTRONICS               http://www.intertronics.co.uk
Tel: +44 1865 842842                Oxfordshire, England
INTERTRONICS is dedicated to providing quality material,
consumable and equipment solutions to high technology
assembly industries, with the highest levels of technical
support and customer service.

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