No problem if you use a hydrochloride activated water-soluble flux!
Brian
Ingemar Hernefjord (KC/EMW) wrote:
> Noone with ideas?
> I've asked specialists at Binghamton too.
> Phil? Ruby? --. ..- -. - . .-. ..--..
> Ingemar
>
> -----Original Message-----
> From: Ingemar Hernefjord (KC/EMW)
> Sent: den 5 april 2005 18:09
> To: 'TechNet E-Mail Forum'; [log in to unmask]
> Subject: RE: [TN] Mousebites...
>
>
> Hi Steve,
> alert experts already online. I have two pictures on Nickel plated AlSiC, chemistry and who did
> it can I not shout out just now, except that it's perfecly free from P, very very 100% Ni. It's greyish,
> dull and matte, and very good for 60Sn soldering, at least speaking wetting. Now, we suspect something
> happens after soldering the glass RF glass beads for SMA. Hermeticity becomes leakers, not gross, but
> enough for rejection. I suspect some kind of fragile interface layers, cross sections indicate that, but
> suspected region is much less than micron thick and hard to study.
>
> When you look at the pics on Steve's mousetrap gallery, what do you think about the very tiny superficial
> items, grains or nanonuggets or columns or how they can be caracterised as...do you think they are pure nickel
> too? Are they atomary bound to the bulk plating or vagabonds that don't take part in the serious solder-nickel
> wedding party? If you bite on a gold dollar you'll have to go through a thin layer of human debris and stuff from
> the underwares first...best I could compare with. Can there be such a 'debris' layer on top of nickel
> plating too, and if so, how do I get rid of it?
>
> The pics are 10k resp 20k magnification.
>
> Crazy q, not optimistic about answer..
>
> Ingemar Hernefjord
> Ericsson Microwave Systems
>
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]
> Sent: den 5 april 2005 15:45
> To: [log in to unmask]
> Subject: [TN] Mousebites...
>
>
> Mornin' all ya'll!
>
> Came back in this morning and looked at the fabs that I posted about
> yesterday some more. We're going to reject them.
>
> Not just because of the mousebites on the annular pads, but we've
> discovered that there are mousebites all over everything. In some
> cases reducing the trace widths.
>
> Take a look at; "Mousebites 1-4" at: http://www.stevezeva.homestead.com
> If it were just the annular pads, we might have accepted them. But not with
> them occuring all over the fab like this.
>
> Kind regards,
>
> -Steve Gregory-
> Senior Process Engineer
> LaBarge Incorporated
> Tulsa, Oklahoma
> (918) 459-2285
> (918) 459-2350 FAX
> __________________________________________________________________
> This message may contain information that is privileged and confidential to
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