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| Date: | Thu, 15 Sep 2005 09:04:25 -0700 |
| Content-Type: | text/plain |
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Not ridiculous, absolutely accurate.
It is the homogenous material which is the ruling factor, and one ball of
63/37 is not the same homogenous material as the rest of the SAC alloy
balls.......................
The number of balls, weight of the equipment - non have anything to do with
the RoHS directive it is the percentage of any homogenous material that is
the requirement.
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 Brian Ellis
Sent: Thursday, September 15, 2005 12:20 AM
To: [log in to unmask]
Subject: Re: [TN] washing of misprints and stencils with leaded and
lead-free
That is a ridiculous statement. RoHS permits a tolerance of 0.1% lead.
So, if you had one ball containing 37% lead and about 400 balls
containing no lead, you would be at the limit, remembering the
difference in SG. I've never counted how many balls there are in solder
joints of different components, but I'd guess there would be more than
400 in the attachment of an average IC (a lot more if it were a
microprocessor or other high I/O device). So one ball (or even several
balls) of leaded lost in a myriad balls of LF will make no difference in
RoHS compliance with an average assembly.
Brian
Reuven ROKAH wrote:
> You should separate the two processes.
>
> even one solder ball of leaded solder will make your product not comply to
> RoHS.
>
> Reuven
>
>
> e mail: [log in to unmask]
>
>
>
> Ron Cullen <ronc
> @ARTESYNCP.COM> To: [log in to unmask]
> Sent by: TechNet cc:
> <TechNet@ Subject: [TN] washing of
misprints and stencils with leaded and lead-free
> ipc.org>
>
>
> 14/09/2005 21:07
> Please respond
> to TechNet
> E-Mail Forum;
> Please respond
> to Ron Cullen
>
>
>
>
>
> Is anyone planning on having separate misprint and stencil wash processes
> for leaded and lead-free because of potential cross contamination issues?
> We are using a spray wash system with alcohol.
>
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