Thanks Harry that fixed it. I am running 99SE SP6. Sometimes those setting are a little obscure to find. I manually did do the solder mask and solder paste layers in the Component editor.
Brad. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Harry Selfridge Sent: May 3, 2007 2:27 PM To: Protel EDA Discussion List Subject: Re: [PEDA] QFN Package Hi Brad, Your approach to constructing the footprint is the same as I have used many times. Sometimes the primitives used within a footprint don't pick up the net if the component is placed or updated after the netlist has been loaded - the behavior differs depending on what version of the software you are using. Since you didn't mention what version of Protel/Altium software you are using, so you may have to hunt for the menu item. Try running 'Design>Netlist>Update Free Primitives from Connected Copper'. Verify that the fill and tracks used in the footprint have picked up the net name, and try re pouring the polygon. Be sure that the polygon option is set to pour over same net. Also be aware that Protel/Altium footprint editor doesn't automatically generate mask layers for fills (only pads). Be careful that you manually build the desired solder mask and paste mask for the fill area on your footprint, or you'll end up with no paste mask, and the thermal pad covered in solder mask. Regards - Harry At 01:30 PM 5/3/2007, you wrote: >Hi. >I have a QFN-10 footprint that I am creating. > >The data sheet shows a solder pad under the device (fill), 5 vias and 4 >tracks all used for heat sinking. > >I placed a copper fill on the PCB component and placed 5 pads and tracks as >shown in the data sheet. The 5 pads have designators that refer to 5 pins in >the schematic component. > >The 5 pins all connect to GND. When I place the PCB part and pour a polygon >GND it does not pick up on the fact that the fill, 5 pads and tracks are to >be connected to GND. > >Is this the correct approach? > >http://focus.ti.com/lit/ds/symlink/tps63000.pdf > >Brad. > snip ____________________________________________________________ You are subscribed to the PEDA discussion forum To Post messages: mailto:[email protected] Unsubscribe and Other Options: http://techservinc.com/mailman/listinfo/peda_techservinc.com Browse or Search Old Archives (2001-2004): http://www.mail-archive.com/[EMAIL PROTECTED] Browse or Search Current Archives (2004-Current): http://www.mail-archive.com/[email protected] ____________________________________________________________ You are subscribed to the PEDA discussion forum To Post messages: mailto:[email protected] Unsubscribe and Other Options: http://techservinc.com/mailman/listinfo/peda_techservinc.com Browse or Search Old Archives (2001-2004): http://www.mail-archive.com/[EMAIL PROTECTED] Browse or Search Current Archives (2004-Current): http://www.mail-archive.com/[email protected]
