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June 2006

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Subject:
From:
Gary Camac <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Gary Camac <[log in to unmask]>
Date:
Thu, 15 Jun 2006 11:09:05 -0500
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text/plain (124 lines)
Camille and Dewey,

Thanks for the replies.  I am trying to rewrite our material specification
for PWBs to allow for lead-free processing.  I am expected to do so without
effecting unit cost (watch me pull a rabbit out of my hat). We presently
specify the use of a /26 compliant laminate.  Anyone got an idea as to the
material cost increase (%) that would be seen by changing to a /126 ?  Is
there any other cost adders for the PWB manufacturer when using a /126
material?

TIA

Gary Camac

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Camille Good
Sent: Wednesday, June 14, 2006 8:43 PM
To: [log in to unmask]
Subject: Re: [TN] /126 Specification Sheet

Gary,

  You could probably contact Gerard O'Brien of Photocircuits for information
on the /126 specs. I just saw a very informative (and very good!)
presentation by him regarding the slash sheets, among other things. His
presentation included information about /126 & /129.

  Gerard is a member of a couple of IPC committees, and I think maybe the
chairman of one of them(?), so you can probably find his e-mail on the IPC
web site.

  As Dewey stated, there are some additional parameters that are mandatory
testing for /126 which are not specified in /26. During Gerard O'Brien's
presentation, I think he said that the /126 and /129 specs are aimed more at
very high reliability applications. If you are going to lead-free processes
but are not doing medical/life safety/aerospace/military type applications,
it is very possible that some of the other proposed slash sheets like /99 or
/124 might be sufficient for what you need.

  -Camille Good
  Portland, Oregon

"Whittaker, Dewey (EHCOE)" <[log in to unmask]> wrote:
  Two materials right now that are procured to /26 will meet the
requirements of /126. The main difference is the mandating of testing that
used to be optional, higher decomp temperature, max Z-axis expansion of 3% @
260 C., and CAF resistance testing.
Dewey

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Gary Camac
Sent: Thursday, June 08, 2006 7:06 AM
To: [log in to unmask]
Subject: [TN] /126 Specification Sheet

Good morning,

I remember seeing a reference to a /126 laminate specification sheet.
Draft
3 of IPC-4101B stops at /96. Where would I obtain a copy of this document or
, better yet, how does this laminate differ from the /26 material.

Thanks,

Gary Camac

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