The PCBs are multilayered double side.

Immersion gold and the Au thickness is 0.059um.

-----Original Message-----
From: Leadfree [mailto:[log in to unmask]]On Behalf Of Werner Engelmaier
/*
Sent: Saturday, September 05, 2009 2:16 AM
To: [log in to unmask]
Subject: Re: [LF] Gold vs Leadfree


Hi John,

What you mean by 'gold tinted'? Immersion Au, electrolytic Au, what? Dull
looks typically indicate a high percentage of SnAu IMCs, but given the lack
of specifics it could be other things, of course.

Werner


-----Original Message-----
From: John Sekene <[log in to unmask]>
To: [log in to unmask]
Sent: Thu, Sep 3, 2009 10:59 pm
Subject: [LF] Gold vs Leadfree




Wonder if anyone could help....

I just recently started using gold tinted PCB's with leadfree. I didn't get
the result I was expecting, meaning the final end product solder ability
looked dull. We have had to rework at least 40% of the PCBs.

What is the criteria for lead free profile using gold surface finishes PCBs?
Am I using the correct profile?

The profile I'm using is 175/200/290 oC

Thanks.

John Sekene

Compuspec Industries Ltd
3-4 Rakino Way
Mt Wellington
Auckland
New Zealand

Ph: 649 918 1990
Fax: 649 918 1970
Http://www.compuspec.com

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