What is the LED wavelength?
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----- Original Message -----
From: vladimir Igoshev [mailto:[log in to unmask]]
Sent: Tuesday, April 26, 2011 05:33 PM
To: [log in to unmask] <[log in to unmask]>
Subject: Re: [TN] White solder mask discoloration
Hi Jean-Francois,
Did you try to have some analysis done one "happened"?
Regards,
Vladimir
SENTEC Testing Laboratory Inc.
11 Canadian Road, Unit 7.
Scarborough, ON M1R 5G1
Tel: (416) 899-1882
Fax: (905) 882-8812
www.sentec.ca
-----Original Message-----
From: Jean-Francois Bissonnette <[log in to unmask]>
Sender: TechNet <[log in to unmask]>
Date: Tue, 26 Apr 2011 16:23:02
To: <[log in to unmask]>
Reply-To: TechNet E-Mail Forum <[log in to unmask]>,
Jean-Francois Bissonnette <[log in to unmask]>
Subject: Re: [TN] White solder mask discoloration
Hello again,
Just realized that I forgot an important detail. It is in fact metal core
(Al). Thank you all for your answers. Still investigating the problem, I
will give feedback as soon as we pinpoint the problem...
JF
-----Message d'origine-----
De : TechNet [mailto:[log in to unmask]] De la part de Dennis Fritz
Envoyé : 25 avril 2011 14:50
À : [log in to unmask]
Objet : Re: [TN] White solder mask discoloration
Most recently, I had seen white solder mask on boards (metal core?) going to
the LED lighting industry (reflectors). I understand the IPC effort on
boards for LED lighting was being centered on the China office. I have
copied David Bergman of IPC on this response, as he may provide links to all
kinds of technology for white mask.
-----Original Message-----
From: Jean-Francois Bissonnette <[log in to unmask]>
To: TechNet <[log in to unmask]>
Sent: Fri, Apr 22, 2011 9:19 am
Subject: [TN] White solder mask discoloration
Hi Technetters,
Does anyone have experience with white solder mask? Any chances of success
assing these through reflow without discoloration?
We had a bunch of them sent to our CM and they all came back with a yellow
o brown discoloration. I believe there are different types of solder masks
ut there but is there some standard regarding their capacity to resist
eat? The process used it RoHS.
Thanks in advance!
Jean-François Bissonnette
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