TECHNET Archives

August 1999

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Paul Klasek <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 27 Aug 1999 08:33:00 +1000
Content-Type:
text/plain
Parts/Attachments:
text/plain (105 lines)
The Ni "looks" fine Mike ; it's the boulders looking that way .
But considering what Roger says, the Ni won't be as solid as it looks,
you may be onto something .
That brings me to next round of this saga :
On Au some of the fabs really excel themselves , going to less than
0.3um(metric)of Au .
Should I worry about porosity of gold and NiO formation in storage ?
Next one ; stemming from this title ; what would be the bottom "safe" line
on Ni ;
5um, 10um ??? = can we counter the quality with quantity ?

thanks                paul

-----Original Message-----
From: Carano,Michael [mailto:[log in to unmask]]
Sent: Thursday, 26 August 1999 23:11
To: [log in to unmask]
Subject: Re: [TN] Nickel plating contaminants ; cracking propagations ?


Paul,

Is what you are seeing looks like a mud cracked appearance in the nickel?

        -----Original Message-----
        From:   Paul Klasek [SMTP:[log in to unmask]]
        Sent:   Wednesday, August 25, 1999 7:51 PM
        To:     [log in to unmask]
        Subject:        [TN] Nickel plating contaminants ; cracking
propagations ?

        This must be a problem season :
        after flakes, cabbages and roses , I have this copper "boulders"
alloy
        problem :
        On our routine microsectioning of (4umNi + 0.3umAu; 63/37) joints we
        discovered we have rather interesting phenomenon :
        After the obvious dissolution of gold ; there are sitting on top of
Nickel
        (admittedly bit thin ; still , continuous) microcracked boulders
(about same
        dia as the Ni layer) .
        when we zoomed scan on them ; we found they're CuSn alloy ! Looks
like a
        smallpoxed nickel face .
        Now our regular profiling 's telling us we're nowhere near this
alloying
        scenarios ;
        and we ponder about the cracking propagations ; the Q is :

        Where are this aliens coming from ?
        Contaminants of tubs from some previous process ?
        Smudged sample polish ?
        Appears only on one specific fab supply .

        Paul Klasek
        http://www,resmed,com

        ##############################################################
        TechNet Mail List provided as a free service by IPC using LISTSERV
1.8c
        ##############################################################
        To subscribe/unsubscribe, send a message to [log in to unmask] with
following text in
        the body:
        To subscribe:   SUBSCRIBE TECHNET <your full name>
        To unsubscribe:   SIGNOFF TECHNET
        ##############################################################
        Please visit IPC web site (http://www.ipc.org/html/forum.htm) for
additional
        information.
        If you need assistance - contact Gayatri Sardeshpande at
[log in to unmask] or
        847-509-9700 ext.5365
        ##############################################################

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following
text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################

ATOM RSS1 RSS2