Jim,

I am used to the .01"/inch myself in the TH world. We are just beginning
to get into the SM world and I thought I had seen a much tighter
tolerance when one is talking about SM. I have ordered the IPC specs,
but they have not arrived yet. Can you confirm to me that the .01"/inch
is valid in SM also?

Thank you sir.

Richard Hamilton
Clemar Mfg. / Rain Bird
[log in to unmask]

> -----Original Message-----
> From: Jim Mathis [SMTP:[log in to unmask]]
> Sent: Wednesday, February 18, 1998 2:27 PM
> To:   [log in to unmask]
> Subject:      Re: [TN] PCB warpage
>
> I spec'd out .01"/inch, also, which used to be the spec.  IPC-275
> section
> 5.2.5.2 now specs Bow & Twist in terms of percentages.  If you don't
> have a
> copy of IPC-275, let me know and I'll fax you the appropriate pages.
>

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