The correct IPC document number is IPC-SM-782. But you can verify patterns
that are not in the book by using the Land pattern calculator. It is on the
IPC web site. Click on the tab On-Line Resources & Databases. That page has
a link to the calculator. If you have any trouble with the variables in the
calculation give me a call.

Other than that you can use the land patterns suggested by the Manufacturer
of the component. They can get you in trouble. IMHO, the manufacturers
optimize for density. The IPC patterns are optimized for process yield . . .

did I just start something?



> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Reid, Lorraine
> Sent: Friday, October 26, 2001 6:21 AM
> To: [log in to unmask]
> Subject: [TN] Land Patterns
>
>
> Can anyone point me to a good reliable resource for land patterns for
> devices which are not in IPC-SM-762?
>
> I need to verify patterns for devices such as TSSOPs, QSOPs, and SSOPs,
> none of which seem to be covered in the standards!
>
> thanks in advance,
>
> Lorraine Reid
>
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