Came across this link....sorry for the delay.
http://www.hrlabs.com/INTERMETALLIC-EXPLANATION.pdf
Alex
-----Original Message-----
From: Mike Fenner [mailto:[log in to unmask]]
Sent: November 27, 2002 9:45 AM
To: [log in to unmask]
Subject: Re: [TN] Purple plague
This goes back a few years! Unfortunately I think you are looking for
f. A brittle intermetallic compound formed by the interaction of gold and
aluminium in microelectronic devices.
It was a problem where Al bond wires were used on Au surfaces. The problem
was solved by not doing it or by using an appropriate extra 3 layer chip in
the package well. this was scrubbed down and gave an appropriate surface on
each face with a neutral centre core. These bond chips are still available
as a "standard" product from a couple of companies, I think with some fancy
name.
I suppose if you check with someone like K & S they will have more data,
being in the bond wire business.
Regards
Mike Fenner
Applications Engineer, European Operations
Indium Corporation
T: + 44 1908 580 400
M: + 44 7810 526 317
F: + 44 1908 580 411
E: [log in to unmask]
W: www.indium.com
Leadfree: www.Pb-Free.com
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of
[log in to unmask]
Sent: Wednesday, November 27, 2002 2:13 PM
To: [log in to unmask]
Subject: Re: [TN] Purple plague
Ioan,
Regarding purple plague:
a. Purple Plague
1 1/2 oz Chambord raspberry liqueuer
4 oz white wine (Zinfandel)
3 splashes 7-up
b. an ordnance survey in England
c. A photographic problem
d. http://www.corrosion-doctors.org/MatSelect/corrgold.htm
e. an invasive plant also called purple loosestrife
Personally, choice A seems appealing right about now...................
Doug Pauls
Advanced Operations Engineering
Rockwell Collins
"Tempea, Ioan"
<itempea@POSITRON To: [log in to unmask]
.QC.CA> cc:
Sent by: TechNet Subject: [TN] Purple plague
<[log in to unmask]>
11/27/02 07:34 AM
Please respond to
"TechNet E-Mail
Forum."; Please
respond to
"Tempea, Ioan"
Hi Technos,
after flirting with black pads, I remembered having read something about
purple plague. Can anybody point me to on-line documentation on the purple
plague?
Thank you,
Ioan
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