Hello, In the following file:
http://kosmosisland.com/island/david/test_1.pcb I have a SOT-428_Transistor (Q1) footprint that I made. With a solder mask as shown in the file, I cannot get the large pad closer than about 170 mils from the edge of the board. It is as close as it can get in the above referenced board. If I make the solder mask parameter small, the pad can be placed next to the edge of the board. What am I missing? Also, I have only done prototypes without solder masks so far. What is the "right" amount of mask? I noticed that even library footprints vary as can be seen in the file referenced above. The transistor in the pcb file: Element[0x00000000 "SOT-428_Transistor" "Q1" "unknown" 32000 41000 -2500 6500 0 100 0x00000000] ( Pad[-9000 16500 -9000 20500 6000 1000 7000 "" "1" 0x00004100] Pad[0 -9200 0 -9200 27500 2000 31500 "" "2" 0x00000100] Pad[9000 16500 9000 20500 6000 1000 7000 "" "3" 0x00004100] ElementLine [-15200 -24500 15200 -24500 1000] ElementLine [15200 -24500 15200 24500 1000] ElementLine [15200 24500 -15200 24500 1000] ElementLine [-15200 24500 -15200 -24500 1000] ) The footprint file: Element(0x00000000 "SOT-428" "" "" 0 0 -25 65 0 100 0x00000000) ( Pad(-90 165 -90 205 60 10 70 "" "1" 0x00000100) Pad( 0 -92 0 -92 275 20 315 "" "2" 0x00000100) Pad( 90 165 90 205 60 10 70 "" "3" 0x00000100) ElementLine(-152 -245 152 -245 10) ElementLine(152 -245 152 245 10) ElementLine(152 245 -152 245 10) ElementLine(-152 245 -152 -245 10) ) Regards, David Koski [EMAIL PROTECTED] !.nospham
