If the customer is requiring no pure Tin finishes then you will have to
do one of the following operations: (1) buy components with a Tin/Lead
finish, (2) Use a Tin/Lead process, (3) replace the Tin or or Lead-free
Tin alloy with Tin/Lead by robotic Tin/Lead dipping per the TMTI
approved process up to the body or chemically strip the Tin finish and
Tin/Lead dip the leads.AVX and Kemet both offer their full line of chip
caps and chip resistors in Tin/Lead finish. 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of BADRI
Sent: Thursday, May 10, 2007 9:01 AM
To: [log in to unmask]
Subject: [TN] PCB assembly for medical devices

Dear All,

We have just started assembling some PCBA's to a medical device
manufacturer. They hate lead free. The question is as follows:

The components are leadfree and the paste used is leaded. Is it ok or do
I
have to pretin all the components with lead and then process. 

We have processed couple of boards without pretinning and we have not
faced
any issue. Will the devise manufacturer accept it.

Please advise on the right process.

Advance thanx

Badri
 


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