I suspect the shaking just dislodged the component, and did not necessarily break of the 'filament'. The pressure from the pick and place head would surely just flatten the filament, which would presumably then reflow with the solder paste. Best regards, Leo Leo M. Higgins III, Ph.D. Vice President Technical Support Operations ASAT, Inc. 3755 Capital of Texas Highway, Suite 100 Austin, Texas 78704 ph 512-383-4593 fx 512-383-1590 [log in to unmask] www.asat.com The information contained in this electronic message is CUSTOMER/SUPPLIER PRIVILEGED AND CONFIDENTIAL INFORMATION intended only for the use of the individual or entity named above. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution and copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by electronic mail. Thank you. -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Gary Camac Sent: Friday, November 18, 2005 3:51 PM To: [log in to unmask] Subject: Re: [TN] Tin whiskers on 0402's in the reel. 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 ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------