If the average picture is 100k and the average word is five characters
A picture would be worth 20,000 words


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Victor Hernandez
Sent: Friday, November 20, 2009 3:08 PM
To: [log in to unmask]
Subject: Re: [TN] PTH hole fill for U-shape ground pin

A picture is worth one thousand words

Vic,

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Matthew Park
Sent: Friday, November 20, 2009 1:17 PM
To: [log in to unmask]
Subject: [TN] PTH hole fill for U-shape ground pin

Technet,

I have one minor issue with a ground pin solder hole fill. This ground
pin is flat and has U shape at one end and the U-shape end is inserted
into two PCB holes that are connected together. These two pins (U-shape
with 0.1" spacing ) are mechanically and electrically connected.
Typically, we have ~80% hole-fill on one of U-shape pins and the other
U-shape pin has ~20% hole-fill. 

Are these hole-pins acceptable as per IPC Class 2 requirement? I
couldn't find this specific standard in IPC 610D. If  I remember right,
an older 610 has this specification. I know IPC 610D section 7.5.5.1
states  min 50% hole fill is acceptable for one ground pin hole for
Class 2. 

thank you
Matthew

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Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
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