Howard, If you peel the tape back and feel sticky adhesive, it's Pressure Sensitive. If there is no adhesive, it's Heat Sensitive. Jason "Howard Watson" <Howard.Watson@am To: [log in to unmask] etek.com> cc: "TechNet E-Mail Forum." <[log in to unmask]> Subject: Re: [TN] SOT 23 placed upside down 07/10/2003 09:32 AM Jason, I'm not sure if it is HSA or PSA, how do you tell the difference? With the feeders we are using (Samsung), it's hard to believe there is enough room for the component to flip in the pocket as the pocket is well covered where the cover tape is separated. I'll do a sample to see if any are loaded upside down. Thanks. Howard Watson SMT Manufacturing Engineer AMETEK/Dixson Jason.Gregory@l abarge.com To: "TechNet E-Mail Forum." <[log in to unmask]>, Howard Watson <[log in to unmask]> 07/09/03 10:31 cc: [log in to unmask] AM Subject: Re: [TN] SOT 23 placed upside down To help with your first question.....I would do a sample inspection on a reel to see if the SOT is loaded in the tape upside down. If it is not, it is flipping during tape pull-back. Are you using HSA or PSA tape? If you are using PSA, then the adhesive may be mis-registered and grabbing the part somehow. For your second question, I would never allow tape and reel for even 50 mil parts and definitely not 20 or 25 mil. Jason Gregory SMT Production Supervisor/ Integrated Product Team Leader LaBarge Inc. (918)459-2367 (918)459-2221 fax [log in to unmask] http://www.labarge.com Howard Watson <Howard.Watson@AM To: [log in to unmask] ETEK.COM> cc: Sent by: TechNet Subject: [TN] SOT 23 placed upside down <TechNet@listserv .ipc.org> 07/09/2003 11:16 AM Please respond to "TechNet E-Mail Forum."; Please respond to Howard Watson Dear Technet folks, I am obviously not following the search protocol properly for the information that I need, so I'll just post my Q's anyway. First question relates to a problem I'm experiencing with some SOT 23's that get placed upside. This occurs on multiple machines/feeders, and my hunch is that the component somehow is flipping upside down in the pockets while in the feeder. Anyone have experience with this problem? I did change the laser centering parameters so that it gets rejected now if it's upside down, but I'd like to figure out the root cause. My second question is regarding QFP components in trays or tape & reel - is there a standard or recommendation for putting fine pitch QFP's in trays verses tape & reel? In other words, are 25 or 20 mil pitch gull wing QFP's OK to be supplied in tape & reel, or should they be in trays to avoid lead damage? We always get these components in trays, and I figured it was to protect the leads, but now I wonder if tape & reel is fine. I'm sure it depends somewhat on the feeders, and their ability to deliver the components without damaging the leads. Any advice will be greatly appreciated. Howard Watson SMT Manufacturing Engineer AMETEK/Dixson --------------------------------------------------- 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 ----------------------------------------------------- Grand Junction, CO --------------------------------------------------- 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 -----------------------------------------------------