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August 2005

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Subject:
From:
John Burke <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, John Burke <[log in to unmask]>
Date:
Wed, 17 Aug 2005 14:08:29 -0700
Content-Type:
text/plain
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text/plain (106 lines)
Oh Yeah,

Dont try and clock that beyond low GHz

John

------------------------------------
Avanex
John Burke
Senior Manager RoHS Compliance
[log in to unmask]
40919 Encyclopedia Circle
Fremont
CA 94538
tel: 510 897 4250
fax: 510 979 0189
mobile: 510 676 6312
------------------------------------


-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Joyce Koo
Sent: Wednesday, August 17, 2005 1:42 PM
To: [log in to unmask]
Subject: Re: [TN] <List>[TN] HASL over nickel


question: if it is high speed board, does the additional nickel layer have a
performance impact?  (assume it is properly done 200-300 micro inch stuff or
Ni-P electroless stuff for 20-30 micro inches...2 different cases...).
                          jk

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Steve Hodge
Sent: Wednesday, August 17, 2005 3:59 PM
To: [log in to unmask]
Subject: Re: [TN] <List>[TN] HASL over nickel


Tom, HASL over ENIG is okay. We used to have a customer who spec'd it.
Actually they spec'd HASL over Nickel but the passivation rate of nickel is
so quick that we ended up using immersion au for protection.


At 01:38 PM 08/17/2005, you wrote:
>Our PC board supplier inadvertently supplied us with boards composed of
>gold over nickel rather than the specified HASL finish. While we kept some
>of the boards to keep our production line running, we sent the rest back to
>have the gold stripped off and run through the HASl process. Now our
>supplier is telling us that they will not be able to remove the nickel that
>has bonded to the copper pads. I'm going to have the supplier guarantee the
>board life in blood, but I would feel more confident in having confirmation
>by this group's expertise. Thanks for your help.
>
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