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March 2003

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Subject:
From:
Bill Decray <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 31 Mar 2003 17:50:39 -0500
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Ezequiel,
Is the finish immersion gold or hard gold? If it is hard gold is there a
solder joint reliability issue soldering to hard gold?


Highest Regards,

William W. DeCray III
Waytec Electronics Corp
Engineering Services Manager
PHONE:(434) 237-6391 ext 115
CELL:   (434) 851-6115
FAX:    (434) 237-1324
E-mail:<[log in to unmask]>
Web http://www.waytec.com
FTP  ftp://ftp.waytec.com


-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Ezequiel Cruz
Sent: Monday, March 31, 2003 5:23 PM
To: [log in to unmask]
Subject: [TN] Silver Fill Plugged Vias / Gold Body


Could someone help me with the following.
I have a BGA with 5 mil (.127 mm) holes through the entire stack.
I need these silver filled plugged.
I need the correct call out for my notes on this procedure.

I also have a requirement to have this design finished in gold. My regular
board house calls this finish "Gold Body". However, I really need the
thickness call outs since this finish is being used for manufacturing and
reliability issues per the above BGA. But I also have an area for a mix
connector which should increase the thickness of the finish in that area
since these will be surface contact pads.

If there is anyone out there who can help me with these issues, I really
appreciate the feedback.

Thank You,
Ezequiel Cruz

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