awesome, Mike Weekes Hamilton Sundstrand 815 394 2497 thanks, a million. Michael Weekes Master Engineer - EOE Hamilton Sundstrand / UTC MS 190-6 4747 Harrison Ave. PO Box 7002 Rockford, IL 61125-7002 815 394 3362 [log in to unmask] -----Original Message----- From: [log in to unmask] [mailto:[log in to unmask]] Sent: Monday, August 04, 2003 11:30 AM To: [log in to unmask] Subject: Re: [TN] commercial resistors and capacitors in high-rel mil applications Michael, A Rockwell-Collins military radio, ARC-210, was the first to be procurred under the Navy's "Aquisition Reform/Mil Spec Streamling" program. There is a write-up in the January 1997 "Signal" magazine. I can fax you a copy if you need it right away. We have been using commercial Rs & Cs for about 8 years without any issues. Jim Carlson Rockwell Collins Reliability Engineer "WEEKES, MICHAEL HS-SNS" To: [log in to unmask] <[log in to unmask] cc: TC.COM> Subject: [TN] commercial resistors and capacitors in high-rel mil applications Sent by: TechNet <TechNet@listserv .ipc.org> 08/04/2003 10:05 AM Please respond to "TechNet E-Mail Forum."; Please respond to "WEEKES, MICHAEL HS-SNS" I have been asked to see if there are any papers or success stories out there for MIL or avionics manufacturers or assemblers who have successfully replaced expensive "qualified" mil-type resistors and capacitors with less-costly, yet as-reliable resistors or capacitors to meet the needs of customers like Lockheed Martin, Boeing or Airbus? I'm looking for anything that can be shared from the component manufacturer, electronics assembler or end customer perspective. This is urgent. thank you, Mike Weekes [log in to unmask] 815 394 3362 Michael Weekes Master Engineer - EOE Hamilton Sundstrand / UTC MS 190-6 4747 Harrison Ave. PO Box 7002 Rockford, IL 61125-7002 815 394 3362 [log in to unmask] -----Original Message----- From: Steve MacDonald [mailto:[log in to unmask]] Sent: Monday, August 04, 2003 9:51 AM To: [log in to unmask] Subject: Re: [TN] Score to trace criteria Hi Frank. I actually wrote one based on the design spec references to I/L clearances and our own manufacturing requirements. The 2221 design spec states that a recc. min trace to edge clearance of .0157 inches be maintained on I/L with additional spacing on outerlayers based on fab and assembly considerations. (Our considerations) (W/ IPC-A-600 allowance of .098 inches of edge nicks or haloing as a guide) We adjusted our figures for worst case (scored edge): +/- .002 for A/W registration. +/- .002 for drill registration. If taking score you need up to .0125 inches from center score for blade width and depth of cut and another .003 inches for blade wander. (the score line can easily be up to .....025 in. wide. So we set optimum safe distance on outers (from score centerline to nearest feature) of .035 inches. Routing allows you to decrease that by the score adjustments. Customers are notified when the supplied data violates that and they may opt to allow a change or accept as it. We record and file their response for future reference. This doesn't apply to heatsinks, ground shields or edge connectors of course. And better equipment begets tighter allowances so as we change equipment we will adjust our house spec accordingly. Hope this helps. Steve MacDonald ----- Original Message ----- From: "Franklin D Asbell" <[log in to unmask]> To: <[log in to unmask]> Sent: Monday, August 04, 2003 09:42 Subject: [TN] Score to trace criteria > Is anyone aware of written criteria dealing with scored edge to trace edge > criteria??? design criteria??? specification tolerance, etc etc > > --------------------------------------------------- > Technet Mail List provided as a free service by IPC using LISTSERV 1.8e > To unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) > To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest > Search the archives of previous posts at: http://listserv.ipc.org/archives > Please visit IPC web site http://www.ipc.org/html/forum.htm for additional > information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 > ----------------------------------------------------- > --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------