I could not get page one of this article to appear. It seems to be a broken link. :-( -----Original Message----- From: Olson, Jack [mailto:[log in to unmask]] Sent: Tuesday, September 12, 2000 6:19 PM To: [log in to unmask] Subject: Re: [DC] Using PCB surface as a heatsink This is the only article I have seen on that subject: http://www.geocities.com/Heartland/Hills/5131/thermal.htm Good Luck, Jack -----Original Message----- From: Jimmy Blier [mailto:[log in to unmask]] Sent: Tuesday, September 12, 2000 2:03 PM To: [log in to unmask] Subject: [DC] Using PCB surface as a heatsink Hi, In my designs, I need to use an area of my PCB as a heat sink for various SMD packages. I'm looking for some technical data or formula (a calculator perhaps) that could show me just how big an area needs to be, to adequately dissipate an amount of power for various SMD packages or body surfaces. Even an article on the subject would be great. Can anyone help me? Thanks, Jimmy Blier CAD Department. (Supervisor) P A R A D O X S E C U R I T Y S Y S T E M S Email: [log in to unmask] <mailto:[log in to unmask]> Phone: (450) 491-7444 Fax: (450) 491-5940