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September 2005

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Subject:
From:
Steve Gregory <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Thu, 29 Sep 2005 14:54:09 -0500
Content-Type:
text/plain
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text/plain (105 lines)
Hi George!

I work at a contract manufacturing company, and we see solder paste gerber
files provided in a few different ways, or sometimes not at all.

I sometimes get them with unique shapes that are different from the pad
shape
on the board. For example I have seen the BGA openings in the solder paste
gerber using squares instead the actually shape of the pad on the board
which
is a circle.

I have seen files provided to us as ODB++ files which some stencil vendors
have
not yet used, and it will take them a bit to get the necessary software to
use the file
so that they can produce a stencil.

Me, I just like a straight 1-to-1 gerber file of the solder paste layer
that mirrors the
SMT pads and fiducials exactly.

Kind regards,

-Steve Gregory-
Senior Process Engineer
LaBarge Incorporated
Tulsa, Oklahoma
(918) 459-2285
(918) 459-2350 FAX



|---------+---------------------------->
|         |           "Kotecki, George"|
|         |           <george.kotecki@N|
|         |           GC.COM>          |
|         |           Sent by: TechNet |
|         |           <[log in to unmask]>|
|         |                            |
|         |                            |
|         |           09/29/2005 02:05 |
|         |           PM               |
|         |           Please respond to|
|         |           TechNet E-Mail   |
|         |           Forum            |
|         |           <[log in to unmask]>|
|         |           ; Please respond |
|         |           to "Kotecki,     |
|         |           George"          |
|         |           <george.kotecki@N|
|         |           GC.COM>          |
|         |                            |
|---------+---------------------------->
  >--------------------------------------------------------------------------------------------------------------|
  |                                                                                                              |
  |       To:       [log in to unmask]@SMTP@Exchange                                                                |
  |       cc:       (bcc: Stephen R Gregory/LABARGE)                                                             |
  |       Subject:  [TN] Assembly data requirements                                                              |
  >--------------------------------------------------------------------------------------------------------------|



To all:
What has been your experience regarding solder mask data supplied to
contract assemblers?  Do they request or use customer supplied data or
do they prefer to generate their own stencils based on volumes?  This is
just an informal poll.   Thanks in advance

George Kotecki


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