Graham,
Aquanox XJN is designed to be used at a 10 - 40% concentration.
We arbitrarily set our concentration to 25%.
(I've had the chemistry running since March and so far so good.)
The necessary concentration depends on what is being run through the
cleaner.
Aquanox will load up with alot of junk before you have to dump it and start
over.
You have a point though. I've run as low as 15% and didn't hear of any
cleanliness problems.
I'm anxiously awaiting that cleanliness spec you talked about in the other
post. :-)
Hans
~~~~~~~~
Hans M. Hinners WR-ALC/LYPME Bldg. 640
Materials Engineer 380 Second Street,
Suite 104
Manufacturing Eng. Sec. Robins AFB GA 31098-1638
912-926-1970 (Voice) 468 - 1970 (DSN) 912-926-7974 (Fax)
[log in to unmask]
> Steve,
>
> 30% concentration of Kyzen? Is this stuff pre-diluted?
>
> It is my experience that good cleaning will result at concentrations of
> less
> than 10%. Most folks I know would prefer to run at less than 5%, 'cos it
> costs less - but 30%??
>
> Please enlighten me or have I missed the plot.....
>
> Regards,
> Graham Naisbitt
>
> [log in to unmask]
>
> WEB: http://www.concoat.co.uk
>
> CONCOAT Ltd
> Alasan House, Albany Park
> CAMBERLEY GU15 2PL UK
>
> Tel: +44 (0) 1276 691100 Fax: +44 (0) 1276 691227
> ----- Original Message -----
> From: Stephen R. Gregory <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Thursday, September 02, 1999 7:16 PM
> Subject: [TN] Dryfilm mask adhesion, the saga continues...
>
>
> > Hi ya'll!
> >
> > Well, I'm making some progress about this mask flaking deal. So I
> thought
> I'd
> > share what I've learned thus far. To refresh, I have a board here that
> loses
> > all it's mask off of every bit of copper after 3-4 washes in a
> Electrovert
> > MCS-1000 cleaner that we run Kyzen Aquanox XJN in at a 30%
> concentration.
> The
> > board is assembled with RMA based flux, that's why the Kyzen. The wash
> is
> > 140º F., and the rinse is 120º F.
> >
> > The fab vendor says it's our cleaning process that's doing it, but I
> first
> > contended that it's either the mask, or the masking process. They came
> back
> > and pointed out that we're assembling 3 other boards with dryfilm mask,
> so
> > why isn't there problems with the other 3 assemblies? So I says;
> > hmmmm...(babbling to myself as usual...hehehe)
> >
> > There is one difference between the flakey board and the other three,
> the
> > flakey board is a PCI card that has gold plated fingers while the other
> 3
> > doesn't have any gold plated on them at all...
> >
> > But I went back in the stockroom and looked at the bare fabs of the
> other
> 3,
> > and could obviously see that a different brand dryfilm mask had been
> used
> > with them.
> > After a conference call today with the fab vendor, we did find out that
> there
> > WAS two different masks being used. I'm not trying to slam any mask over
> the
> > other, just relating my experiences, but the flakey mask is a DynaChem
> KM,
> > and the other is a Dupont 8140. They said they would switch over to the
> > Dupont mask....(I'm thinkin' to myself, WHY didn't they do that months
> ago
> > when all this started? Especially since they built 3-different lots of
> boards
> > with the DynaChem mask after first receiving the first complaints? They
> had
> > at least TWO chanches to switch! But nooooo...)
> >
> > The $30,000 dollars we got into components and assembly labor on boards
> that
> > have bare-naked traces and vias is still being contested, because they
> said
> > they complied with the drawing since no certain mask was specified, just
> the
> > IPC spec, basically saying that's it's our problem we use Kyzen Aquanox
> XJN.
> > Sounds kinda' lame to me, but thank goodness at least I'm outta that
> loop!
> >
> > Least now I know what kinda dryfilm mask NOT to use with Kyzen (I'd
> rather
> > not have to deal with dryfilm at all, but whatcha gonna do?)
> >
> > -Steve Gregory-
> >
> > ##############################################################
> > 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
##############################################################
|
