I do not have that capability. And, since we haven't had a mis-pick since vibrating the reel, I feel the evidence may be destroyed. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Tempea, Ioan Sent: Friday, November 18, 2005 3:02 PM To: [log in to unmask] Subject: Re: [TN] Tin whiskers on 0402's in the reel. Gary, could you post some pictures? It would be interesting to see the one with the filament on it. Thanks, Ioan > -----Original Message----- > From: TechNet [SMTP:[log in to unmask]] On Behalf Of Gary Camac > Sent: Friday, November 18, 2005 3:57 PM > To: [log in to unmask] > Subject: [TN] Tin whiskers on 0402's in the reel. > > Good afternoon, > > > > We have had a problem today with a reel of 0402 resistors where the > placement machine would not pick some of the parts out of the tape (paper). > A part I examined would not fall out of the pocket when the feeder was > turned upside down. I examine the part sitting in the pocket and it > appeared to be jammed into one corner. After some tapping on the feeder the > part dislodged. When I examined the part under a microscope, I noticed a > filament attached to the bottom of the part starting at the corner of the > electrode. The following part in the tape would, likewise, not fall out > until persuaded. This part fell into my hand and when I examined it under > the scope I could see a filament lying beside it in my palm. > > > > These parts are a 2002 date code. Tin whisker? Anyone seen this before? > > > > I took the reel on components to our environmental test lab, bolted it to > the sinusoidal vibration table and shook for about a minute. We then > reinstalled the reel on the placement machine and the picking problem went > away. Interesting stuff for a Friday afternoon. > > > > Gary Camac > > Senior Mfg. Eng. > > Dickey-john Corp. > > > > > > > --------------------------------------------------- > Technet Mail List provided as a 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/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 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/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 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------