Has anyone managed to find an image of "popcorning" of plastic component packages that they are willing to share? > -----Original Message----- > From: Stolar, Paul W [SMTP:[log in to unmask]] > Sent: Friday, December 06, 2002 2:29 PM > To: [log in to unmask] > Subject: Re: [TN] Vacuum > > Steve, > I am thinking of a low vac, 20-30 in Hg. Most of our parts are plastic, so > we have to worry about popcorning. > > "Common sense" makes us think that vacuum will 'pull' out moisture. But > isn't the only criteria be that the surrounding atmosphere be very dry. > One > could get that by vacuum or N2. Heat will be needed, but we also don't > want > the parts to se too much heat, especially to meet the J-STD-033 > requirements. > > Paul > > > > > > -----Original Message----- > From: Creswick, Steven [mailto:[log in to unmask]] > Sent: Friday, December 06, 2002 1:19 PM > To: [log in to unmask] > Subject: Re: [TN] Vacuum > > Paul, > > I know that I am not Guy, but with sufficiently low vacuum one could > reduce > the boiling point to effectively room temperature (or lower). What degree > of vacuum are you speaking of? :-) > > Steve > > -----Original Message----- > From: Stolar, Paul W [mailto:[log in to unmask]] > Sent: Friday, December 06, 2002 2:14 PM > To: [log in to unmask] > Subject: Re: [TN] Vacuum > > > Guy, > Which ones? > Why with vacuum and not with heating? > > Paul > > > -----Original Message----- > From: Guy Ramsey [mailto:[log in to unmask]] > Sent: Friday, December 06, 2002 12:39 PM > To: 'TechNet E-Mail Forum.'; 'Stolar, Paul W' > Subject: RE: [TN] Vacuum > > Yes. > Moisture sensitive components can be damaged by vacuum. > > > -----Original Message----- > > From: TechNet [mailto:[log in to unmask]] On Behalf Of Stolar, Paul W > > Sent: Friday, December 06, 2002 11:33 AM > > To: [log in to unmask] > > Subject: [TN] Vacuum > > > > > > Has anyone ever heard of vacuum damaging components? > > > > --------------------------------------------------- > > 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 -----------------------------------------------------