> What is a thermal relief connection? OK. On the PCB you have holes (for your components) and pads around (for soldering). You connect these pads with traces. If you decide to fill everything else of the board with a copper, you can place a polygon. If this polygon is attached to a net (let say GND), all traces and pads, which are not connected to it, will be automatically cleared. The pads that are connected to the same net (GND) may be connected directly (you'll see only the hole) or thermally (you'll see this: \ / o / \ or | -o- |
If you need to solder a pad, which is connected to a big copper polygon or a plane, you'll need much more to heat it during soldering. To avoid this we use thermal relief pads. The "plane" is normally in inner layers (used for spreading out the VCC and GND), negative image, solid copper and pads only. Mira __________________________________________________ Do You Yahoo!? LAUNCH - Your Yahoo! Music Experience http://launch.yahoo.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/[email protected] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
