Torsten,

pH13!!! None of the ordinary polymers will withstand that.  Are you sure of 
the requirement?  I've never seen anything like that.  I don't think even 
Parylene will be enough.  I used Parylene C for military encapsulation of 
parts that had to pass salt spray for weeks, high temperatures and like, and 
we found that to withstand such a harsh environment , the Parylene had to be 
so thick, that the process had to be modified. The cost per package had been 
quite unrealistic.

I would try ceramic spraying, that's probably your solution. There are lots 
of variants. I can't tell you which one suits best.  Some are for 
electronics, others not. You better check the below URL and call the 
respective ceramic spray specialist.

http://www.electronics.ca/publications/products/Coatings-for-Medical-Devices-%252d-Global-Strategic-Business-Report.html

Good Luck

Inge



--------------------------------------------------
From: "Torsten Hagge" <[log in to unmask]>
Sent: den 25 May 2010 12:30
To: <[log in to unmask]>
Subject: [TN] Coating

> Hi Technetters,
>
> looking for an conformal coating for electronics used in medical 
> application. The small electronic should be able to pass 1000 cycles 
> washing and cleaning process with ph=13 plus 20 minutes autoclave 135°C @ 
> 2bar.
>
> 1st idea is parylene coating, any cheaper or better ideas?
>
> Regards,
> Torsten
>
> Dipl.Ing.(FH)Torsten Hagge
> tech. projectmanager
> Kristronics GmbH
> Gewerbegrund 5 - 9
> 24955 Harrislee
>
> Tel.:    +49 461 7741 624
> Fax:     +49 461 7741 642
> [log in to unmask]
> www.kristronics.de
>
> Gerichtsstand Flensburg, Handelsregister: HRB 1433 FL
> Geschäftsführer Dipl.-Ing. oec. Thormod Ohm
> Ust-Id-Nr. DE 811182059
> Bankverbindung: Deutsche Bank AG Flensburg, Konto-Nr. 4216610, BLZ 
> 21570011
> IBAN: DE32 2157 0011 0421 6610 00, BIC: DEUT DE HH 215
>
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