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Date: | Mon, 12 Jun 2000 17:30:08 -0700 |
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Hi Mike
In Y14.5
Sec. 6.4.1 deals with straightness which references "bow" (6.4.1.4).
Sec. 6.4.2 deals with flatness.
You are right they are different.
They can be additive.
Good Luck
Mike
-----Original Message-----
From: Mcmaster, Michael
[mailto:[log in to unmask]]
Sent: Tuesday, June 13, 2000 1:03 AM
To: [log in to unmask]
Subject: [TN] Warpage, Flatness and Surface Profile
I have a customer with a specification for bare board
warpage, but the part
also has flatness and surface profile requirements on the
print. The
warpage requirement is in the customer's specification,
which also says that
any print requirements supercede the spec.
Are flatness and warpage the same thing? Or are they
additive? If the
flatness spec is based on Maximum Material Condition do I
get to include the
warpage as separate MMC condition that's in addition to the
flatness
requirement?
I've never been able to find anything in the ANSI Y14.5 for
warpage, bow or
twist which are the terms most of us are familiar with.
Can anybody help
me out here?
Mike McMaster
RF Product Engineer
Merix Corporation
Forest Grove OR
503-992-4263
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