Jim,

The IPC web site has an on-line pad design calculator I use quite frequently
with good results.  You can use the pre-made patterns or cook-up your own.
Really nice tool, but the IPC manual Graham mentioned is the bible.  Very
handy document.

Mark


> -----Original Message-----
> From: West, Jim [SMTP:[log in to unmask]]
> Sent: Thursday, November 06, 2003 1:50 PM
> To:   [log in to unmask]
> Subject:      [TN] Component footprint and Pad sizes.
>
> Hi,
>
> Where can I find specifications on what the pad sizes should be,
> particularly for 0603 components or SOT, and SOD-123 components, but
> really any component in general?  We recently ran a new board with the
> supplier recommended pad, and footprints, but this layout will require an
> almost perfect placement, and inspecting for a properly wetted fillet is
> not possible because there is not enough pad space to provide a good
> fillet.  I have specifications from the supplier, but I question where
> their sizes come from.  What standard can I obtain that shows recommended
> pad sizes for different components.
>
>
> Jim
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Search the archives of previous posts at: http://listserv.ipc.org/archives
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 847-509-9700 ext.5315
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