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December 2004

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Subject:
From:
Jeffrey Bush <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Jeffrey Bush <[log in to unmask]>
Date:
Wed, 1 Dec 2004 07:48:14 -0500
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Yes - I agree, the thickness range is set - 20-40.

Jeffrey Bush
Director, Quality Assurance and Technical Support

VERMONT CIRCUITS INCORPORATED
  76 Technology Drive - POB 1890
    Brattleboro, Vermont 05302
      Voice: 802.257.4571.21 Fax: 802.257.0011
           http://www.vtcircuits.com
 

-----Original Message-----
From: R Sedlak [mailto:[log in to unmask]] 
Sent: Tuesday, November 30, 2004 6:31 PM
To: [log in to unmask]
Subject: Re: [TN] Immersion White Tin Plating Specification

Before we go off writing specifcations that make the fabrications people
spit and swear, I want to remind all that all immersion plating is
self-limiting, and when all the substrate is covered, you stop plating,
no matter what temperature, or how long you leave it in the plating
bath...

Most fabricators have trouble getting 50 microinches of Tin, and 40 is
pretty much the standard...

30 is pretty considered pretty thin..
And, no flat finishes are going to perform as well as HASL, if only
because of thickness, nevermind superiority of alloy...

Rudy Sedlak
RD Chemical Company



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