One note for cleaning the stencil, watch what you use, alcohol tends to trap the adhesive and dry it out in the apertures. There are special wipes available, better to have two tanks so you don't mix paste with adhesive wash which should use heated water to soften more of the adhesive. Just our opinion from what we have seen over past 4 years. Dave Chapman -----Original Message----- From: Nowland, Russell Howard (Russell) [mailto:[log in to unmask]] Sent: Friday, October 03, 2003 9:23 AM To: [log in to unmask] Subject: Re: [TN] Adhesive printing Yannick, This is a relative easy process and does not require any special equipment except maybe cleaning equipment (stencil and board). I always use stainless steel stencils and squeegee blades. There are plastic stencils available but I always felt they were not robust enough. The stencil I use is 6 mils. On the PCA's that I used HASL on I under-etched the discrete attachment pads 3 mils to provide a pocket for the HASL to I got better gasketing and less bleed out. I used Loctite 3612 because at the time it had the best strength, best release, and stayed on the stencil better than the rest. Aperture sizes I used were 0805 (18x60 mil) 1206 (28x70mils) 1210 (28x110mils) 0603 (12x40mils) SOT23 (12x120). Russell Nowland Lucent Technologies, Suite 100 7725 West Reno Ave. Oklahoma City, OK 73127 Phone: 405-782-7765 Fax: 405-782-7905 email: [log in to unmask] -----Original Message----- From: Yannick Brisson [mailto:[log in to unmask]] Sent: Friday, October 03, 2003 8:41 AM To: [log in to unmask] Subject: [TN] Adhesive printing Hi, Does anybody ever try to print adhesive on a board, we have a double side board which need to go after SMT in the wave, we must put some glue on the board to keep the component on the board. And it's time consuming to get the glue off the board. Now we are thinking to print adhesive with a stencil. What do I need to do that? what type of stencil, squeegees, aperture for the component, how much adhesive must I have on the board, thickness of the stencil, in other wordswhat do I need to know to do this opertaion. Thanks you Yannick --------------------------------------------------- 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 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- 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 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- 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 847-509-9700 ext.5315 -----------------------------------------------------