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 >