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Date: | Thu, 27 Nov 2014 08:31:39 -0500 |
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Sure. Use whatever bright tin you want. See if you can measure the compressive stress in the deposit - like plate a coiled spring and see how much it deflects after plating -from day to day.
BUT, if you use bright tin, be sure ALL tin on the component leads or circuit boards are covered by lead-containing solder. Most important - use a stiff conformal coating OVER everything you have plated with electrolytic tin.
Despite manufacturer claims, I do not believe any electrolytic tin is whisker free forever - bright or matte. So much of tin whisker initiation depends on factors besides the tin brightner formulation that I would not trust any tin electroplate to be whisker free for 20 years. MITIGATE, or find something besides pure electrolytic tin.
Denny Fritz
-----Original Message-----
From: Anil Kher <[log in to unmask]>
To: TechNet <[log in to unmask]>
Sent: Thu, Nov 27, 2014 7:27 am
Subject: [TN] bright whisker free electrolytic Tin plating
I want to set up a Bright acid tin plating bath for reliable whisker free
tin plate of 3 to 5 microns. Any advise on the best and trouble free
chemistry?
Thanks Anil
Managing Director
Micro Interconnexion Pvt. Ltd.
D3-12A, Corlim Ind. Estate, Corlim
ILHAS, Goa, 403110
Tel: +918322284337/209
LEADERS IN GOLD PLATED PCBs
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