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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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