Hi James,

I've never got a "footprint" pattern from JEDEC, have you? I've gone to
the JEDEC site to see package dimensions, but I never understood them to
have land patterns or footprints for the packages. I've never known them
to be invloved with the manufacturing side of the packages, only the
packages themselves. Am I wrong? If I am, would someone please tell me
where they hide the footprints?

I think it's great that an organization is finally trying to convince
the manufacturers to "use" a standard package, and I'm still hoping IPC
can convince all us designers to use their land pattern standards. We'll
see. ;)

TIA.

Mitch

---------Included Message----------
>      Date: Wed, 15 Aug 2001 21:39:39 -0500
>      From: "James Jackson" <[log in to unmask]>
>      Reply-To: ""(Designers Council Forum)""
<[log in to unmask]>, "James Jackson" <[log in to unmask]>
>      To: <[log in to unmask]>
>      Subject: Re: [DC] SM footprints and standards
>
>      Chris,
>
>      I believe that JEDEC is the controlling organization for the
package styles here in the U.S.
>
>      You will see several references in the IPC-SM-782 to this.
>
>      I think that the way it works, is that a company creates a new
package style, and submits it to the JEDEC committee, where it is voted
on and when approved becomes an 'official' pattern.
>
>      The Japanese have their equivalent to the JEDEC (the EIAJ) - and
this causes some pattern differences, at times - but the companies are
now realizing the benefits of 'playing together' when creating new
patterns.
>
>      Regards,
>
>      James Jackson
>      Oztronics
>
>
>        I have several links to surface mount standards, but what I
would like to know
>        is who actually makes the standards for these footprints?
>        Is it IC makers and they are adopted such organizations as
IPC?
>        Are the IPC standards THE standard or are they a collection of
>        others?
>
>        I understand there are some European standards as well. Who
>        controls these? (These may be a Gary questions)
>
>        I've found standards or actually descriptions at several
different sites and
>        want to ensure all are correct.
>
>        Same question with package types....
>
>
>        CR
>
---------End of Included Message----------
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