The information you are looking for is in IPC-2222
page 17 section 9.1.3 Clearance Area in Planes and
table 9-1 which provides feature location tolerances
for technology levels A,B,C.




Tim Easterling
Cadd Manager Commercial Engineering
SCI Systems Inc.
8600 S. Memorial Parkway MS 200
Huntsville, Al. 35802
(256)882-4426 (ph)
(256)882-4700 x4426 (voicemail)
(256)882-4304 (fx)
----------------------------------------------
Can you tell me on what page of IPC-2221/2222 the fabrication allowance
appears on?  I do not have a copy, yet, but the people I have asked to check
say it is not in there.  I have IPC-D-275, which has it in Table 5-10 on
page 64.

----- Original Message -----
From: Gary Ferrari <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, September 22, 1999 6:43 PM
Subject: Re: [DC] IPC Specs - Errors?


> Ray,
>
> The IPC-2221/2222 makes quite a few improvements over the IPC-D-275,
> especially in the standard fabrication allowance. I would suggest that you
> obtain a copy and evaluate these differences against your experiences. Any
> comments would be welcomed.
>
> Additionally, IPC standards committees are not closed to the public. They
> welcme all comments and data submitted for review. I suggest if you have
data
> that supports your concerns, that you submit them to the committee for
> evaluation. The committee has scheduled a meeting at IPC Works in
Minneapolis
> on October 25th. I am sure they would like to meet with you and/or discuss
> your findings.
>
> Regards,
>
> Gary Ferrari
> Executive Director
> IPC Designers Council
> 80-350-9300
>