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December 2001

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Subject:
From:
"Vandendolder, Ron" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 13 Dec 2001 15:30:15 -0500
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Kris,

Although not quantitative, I was impressed with some SEM's (Scanning
Electron Microscope)
pictures taken of some gold plated Duroid boards that were not performing as
expected.  The pictures showed globular deposits of gold on the top surface.
Where the globular deposits didn't
touch, nickel was clearly showing.

Ron VandenDolder
Product Development Group
Telaxis Communications
SouthDeerfield, MA
413-665-8551

-----Original Message-----
From: Kris Keating [mailto:[log in to unmask]]
Sent: Thursday, December 13, 2001 2:31 PM
To: [log in to unmask]
Subject: [TN] porosity of gold plating on nickel


Does anyone know of a fairly simple method of determining porosity of gold
plating over nickel on a PCB?


Kristopher J. Keating
Technical Service Engineer
Circuit-Wise, Inc.
400 Sackett Point Rd.
North Haven, CT 06473
Tel. (203) 281-6511
Fax (203) 287-8409

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