Hi Lou,

Times when we've talked about standard and non-standard laminates it had to
do with overall sheet size and tooling.  My old shop was 1" oversized on
cores when the industry standard is 1/2" oversize.  What's your panel/board
size?

Hans

AC-130 Gunship Motto: "You can run but you'll only die tired."
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Hans M. Hinners
Electronics Engineer
Warner Robins - Air Logistics Center (WR-ALC/LUGE)
226 Cochran Street
Robins AFB GA 31098-1622

mailto:[log in to unmask]

Com: (478) 926 - 5224
Fax:   (478) 926 - 4911
DSN Prefix: 468


-----Original Message-----
From: Takach, Lou J [mailto:[log in to unmask]]
Sent: Monday, March 18, 2002 7:11 AM
To: [log in to unmask]
Subject: [TN] Non-Standard material


Good Morning Technetters...

I need your input / advice. Our manufacturing facility has recently (within
a year or so...) switched to a new PCB fabricator. I'm now starting to get
complaints from manufacturing that our fabricator is having trouble
obtaining the 'non-standard' material that we are specifying.  First of all,
I don't believe that I'm specifying non-standard material, this is where I
need your input. Most of our boards are multi-layer, usually 4 to 6 layers
and we use FR4. We typically specify 2-oz copper on the internal power and
ground layers and sometimes 1-oz copper for the outer signal layers. Is this
non-standard? The fabricator says that they typically don't stock 1 over 2
copper. Maybe I'm missing something but I thought that the stackup could be
made of individual copper sheets of various copper weights as long as the
layer sequence was balanced.

All comments welcome...

Lou

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