are we talk about thermal spray ceramic coating?  may not  
photoimagable, but definitely, change from glassy to matte with  
adjust composition...
On Feb 9, 2017, at 3:46 PM, Wayne Thayer wrote:

> Hi Victor-
>
> Yes, soldermask should be completely impervious to every chemical  
> known, unless I want to remove it and then I want a secret  
> combination where it just sluffs off, leaving the board ready to  
> coat again.
>
> It also needs to be completely non-toxic, non-cancerous.
>
> Easy to image and develop with non-hazardous chemistries which have  
> no environmental issues.
>
> Apply in any thickness from 5 microns to 150 microns and it images  
> and cures perfectly.
>
> Semi-gloss or flat so it doesn't hurt AOI.
>
> Any color.
>
> A perfect dielectric - no pinholes.
>
> Great scratch resistance.
>
> Blocks moisture ingress into the board.
>
> AND CHEAP.
>
> To quote Big Audio Dynamite:  "....And if you ain't ill, it'll fix  
> your car!"
>
> Wayne
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of SALA GABRIELE
> Sent: Thursday, February 09, 2017 12:37 PM
> To: [log in to unmask]
> Subject: [TN] R: [TN] Solder mask
>
> Kind ok SM, thickness  and correct  polymerization, make the  
> difference against solvents ( which kind of solvents?) reaction...
>
> Gabriele
> -----Messaggio originale-----
> Da: TechNet [mailto:[log in to unmask]] Per conto di  
> [log in to unmask]
> Inviato: giovedì 9 febbraio 2017 20:58
> A: [log in to unmask]
> Oggetto: [TN] Solder mask
>
> Fellow TechNetters;
>
>    Should the PWB/PCB solder mask be IMPERIVIOUS to a wide range of  
> process solvents?
>    What is the temperature break down of solder mask?
>
> Victor,
>
>
> ---
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