Hi Victor,

you can find also useful infos on IPC-SM-840  and    IPC-HDBK-840.

Gabriele

-----Messaggio originale-----
Da: TechNet [mailto:[log in to unmask]] Per conto di Wayne Thayer
Inviato: giovedì 9 febbraio 2017 21:47
A: [log in to unmask]
Oggetto: Re: [TN] R: [TN] Solder mask

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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