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March 2000

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Subject:
From:
Ed Cosper <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 30 Mar 2000 08:08:05 -0500
Content-Type:
text/plain
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text/plain (58 lines)
In one word.  YES!    .200 thick parts with  holes that small will tend to
plug at HAL every time. It most likely will not affect every hole on a board
but I would bet it effects some holes on every board.  This is also very
difficult and time consuming to sort for. I would not be surprised if you
actually received some plugged hole even after your suppliers inspection.

ED Cosper

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Darrel Therriault
Sent: Wednesday, March 29, 2000 7:13 PM
To: [log in to unmask]
Subject: [TN] B/P Yields

Technetters/Fabricators,

My supplier is having a problem with yield on our backplane (~.200",
SMOBC/HASL).  It seems to be centering around
hole plugging from HASL.  FHS are .024", .028", .032" for both pressfit and
pth connectors.  Is this a typical problem for
these requirements??

If so, what are other finishes to consider to achieve higher yields but not
introduce large cost adders??

Comments and suggestions appreciated.

Tks........DT

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