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May 2000

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Subject:
From:
"Edward J. Valentine" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 18 May 2000 08:40:17 -0400
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Shirley - I would recommend you classify the board as a SMT Board. The
tighter requirements will assist you with solder paste printing and
component placement. If you have any SMT parts on a board, you should go
with the tighter requirements. Ed/

Ed Valentine
Electronics Manufacturing Solutions
8612 Mourning Dove Road, Raleigh, NC 27615
Phone: (919) 270-5145, Fax: (919) 847-9971
Email: [log in to unmask]
Website: http://www.ems-consulting.com

----- Original Message -----
From: Shirley Xiao <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, May 17, 2000 10:26 PM
Subject: [TN] SMT/PTH classification


>   Techneters:
>   The IPC specification for PCB warpage is 0.7% for
> SMT board and 1.5% for PTH board. My question is how
> to classify SMT board and PTH board. For example a
> board have hundreds PTH but with several SMD with
> minimum pitch of 0.75mm.
>
>   Shirley Xiao
>
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