Don't you have to use Tegon with the Thermalbond to bond it to the material? William W. DeCray III Engineering Services Manager PHONE:(434) 237-6391 ext 115 CELL: (434) 851-6115 FAX: (434) 237-1324 E-mail:<[log in to unmask]> Web http://www.waytec.com FTP ftp://ftp.waytec.com -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Newland, Scott Sent: Thursday, November 07, 2002 7:41 AM To: [log in to unmask] Subject: Re: [TN] heatsinking a PCB Try Arlon - Thermalbond. It is a rubber based thermally enhanced compliant sheet adhesive. It comes in .015 and .008 thinknesses. You will still need to add the electrically conductive gaskets to get electrical conductivity. We typically use a vacuum bag to perform the lamination processes. We have used this material in several space and airborne applications with great success. Scott Newland Harris GSCD 321 727 6472 Pager 321 690 4131 E-Mail <mailto:[log in to unmask]> [log in to unmask] For a brain teaser try: http://pao.gsfc.nasa.gov/science.html <http://pao.gsfc.nasa.gov/science.html> -----Original Message----- From: Genny Gibbard [mailto:[log in to unmask]] Sent: Wednesday, November 06, 2002 10:53 AM Subject: heatsinking a PCB We have a small PCB with SM components mounted on one side and a heatsink mounted against the other side over the entire surface of the PCB. The heatsink is grounded, so we use a thermally conductive, electrically isolative thermal interface material in between (0.5mm thick), to protect signal vias. We also use some strips of electrically conductive gasket in strategic areas to provide good electrical grounding between the two. Migration of some substances out of the thermal material onto the PCB over time has caused performance problems on random, not all, units. I was wondering what other methods might exist for heatsinking a PCB, possibly permanently bonding the metal heatsink to the PCB in some way. Any sources of information for alternatives is appreciated. We cannot change the construction materials of the original PCB, which is a multilayer (4 layer) FR4, but we may be able to bond an additional layer onto the PCB, in place of the gasketing we use now. Thanks in advance, Genny --------------------------------------------------- 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 -----------------------------------------------------