On 14 Apr 2002 at 13:02, Earl Moon wrote:

> Folks,
>
> Just a simple question really. How many folks use IPC SMT footprint
> guidelines compared with supplier recommendations? There often is
> quite a difference. As everyone on this planet uses IPC acceptance
> criteria, why shouln't everyone use IPC design guidelines but for
> component supplier liability issues?

I use (where place is no issue) the IPC footprints, because my CAD
system has a quite good and complete IPC library. If place IS an
issue, I build my own or use manufacturer's or assembly house's
recommendations. For small passive and semiconductor stuff, I like
the former Philips Components Guidelines (not available any more) and
für ICs the Philips Databook IC26 (don't know whether still
available). They need much less place but also smaller tolerances.

Regards Matthias Mansfeld --
Matthias Mansfeld Elektronik
* Leiterplattenlayout, Bestueckung
Am Langhoelzl 11, 85540 Haar; Tel.: 089/4620 093-7, Fax: -8
Internet: http://www.mansfeld-elektronik.de

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