ROFL ....from the bay John Burke (408) 515 4992 -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Dwight Mattix Sent: Thursday, June 05, 2008 11:12 AM To: [log in to unmask] Subject: Re: [TN] Stainless Steel Contamination Question - Source Revealed should have been obvious to me -- but us being in CA and with the frequency of tongue piercing you can understand the confusion... At 10:23 AM 6/5/2008, Leland Woodall wrote: >Time's up, folks! > >I'm beginning to understand how I overlooked this initially... > >Try an ESD wrist strap band with interwoven elastic, nylon, and >stainless steel fibers. > >They're now all off the floor and have been replaced with solid, >Speidel-style bands. > >After I found the source, we queried the internet again and associated >metallic contamination with ESD wrist strap bands. > >One of the results returned was an interesting article at > >http://www.nasa.gov/offices/oce/llis/0301.html > >It seems that NASA identified a similar problem back in 1993. I'm now >just wondering why these things are still being manufactured. I'd >always been under the assumption (yep, I know that's bad) that the >working contact area on these bands was the small metal plate located on >the rear of the snap. > >I'd never examined one of these under high magnification. Low levels >won't show you the true construction of the weave, as the stainless is >quite small. > >If you're currently using these in your facilities I'd strongly suggest >you consider a replacement. These things are downright dangerous! > >Please let me know if you have additional questions or if I can be of >further help. > >Have a great day! > >Leland > > > >-----Original Message----- >From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D. >Sent: Thursday, June 05, 2008 12:30 PM >To: [log in to unmask] >Subject: Re: [TN] Stainless Steel Contamination Question - Source >Nailed! > >Was it a stainless steel brush being used to improve the Huntron's >electrical probe contact? > >-----Original Message----- >From: TechNet [mailto:[log in to unmask]] On Behalf Of Leland Woodall >Sent: Thursday, June 05, 2008 9:15 AM >To: [log in to unmask] >Subject: [TN] Stainless Steel Contamination Question - Source Nailed! > >Everyone, > >After checking every filter, every transfer belt, every reflow oven, and >most every square inch of the building, I was able to identify the >source of the 10 micron stainless steel that has been giving us such a >headache. Just in case anyone ever has the same problem, I thought I'd >share the solution with our group. > >To refresh your memory, we were finding this stuff on top of components, >and later inside our Huntron X-Y table inspection machines. We did >everything but take a hatchet to the Huntrons, and there was nothing >found (of course). > >While one of the Huntron machine's operator was gone to lunch, I decided >to check an item she had left behind on her workstation. I took it to >the lab, placed it beneath the microscope, and was astonished to find an >identical match to our contamination woes. > >Before I let the cat out of the bag, does anyone want to venture a >guess? > >Leland > >--------------------------------------------------- >Technet Mail List provided as a service by IPC using LISTSERV 15.0 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/contentpage.asp?Pageid=4.3.16 for >additional information, or contact Keach Sasamori at [log in to unmask] or >847-615-7100 ext.2815 >----------------------------------------------------- > >--------------------------------------------------- >Technet Mail List provided as a service by IPC using LISTSERV 15.0 >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/contentpage.asp?Pageid=4.3.16 for additional >information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 >ext.2815 >----------------------------------------------------- > >--------------------------------------------------- >Technet Mail List provided as a service by IPC using LISTSERV 15.0 >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/contentpage.asp?Pageid=4.3.16 for additional >information, or contact Keach Sasamori at [log in to unmask] or >847-615-7100 ext.2815 >----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------