SparkFun-2-layer-TIGHT.dru

description[en] = <b>SparkFun 2 Layer Design Rule Checks - STANDARD/TIGHT/FAB-LIMIT</b>\n<p>\nThese rules have been curated by SparkFuns DFM commitee. After doing much research, communicating with our multiple fab houses, and getting quotes of various designs, we have compiled three DRU files. \n<p>\n<b>STANDARD:</b> This is more of a "best case scenario" set of limitations. If your design has the space, and/or you have the time to work within these parameters, please do. Larger trace width and clearance makes for easier visual inspection of the PCB while troubleshooting (useful in production and to the end user). It also allows for better ability to hack a trace (if you are crazy enough to scrape away the mask and solder to a trace). Another thing to keep in mind is that more metal is just more robust. \n<p>\n<b>TIGHT:</b> This is where cost comes into play. We have found that most fab houses begin to add extra charges when you go smaller than these specs. In some cases, going to less than 15 mil trace can increase the cost by 10%. (This is why we have set the min drill on this DRU to 15 mil) Same story for traces thinner than 7 mil. To avoid those extra charges, then stay within the rules of this DRU.\n<p>\n<b>FAB-LIMIT:</b> These set of rules are at the very limit of most fab houses capabilities. You will pay more for these specs, and it should be used on designs that have a darned good reason to need 4 mil vias and 4 mil traces.\n<p>\n**NOTE Clearance, Distance, Sizes, and Restring are all set to different limits in each of these three DRU files. Please compare the files within the CAM job editor window of eagle to see all the numbers.\n<p>\n***NOTE, Please set your Net Classes to default (0mil for all settings), so that it won't effect the DRC when you run it with these settings.
layerSetup = (1*16)
mtCopper = 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm
mtIsolate = 1.5mm 0.15mm 0.2mm 0.15mm 0.2mm 0.15mm 0.2mm 0.15mm 0.2mm 0.15mm 0.2mm 0.15mm 0.2mm 0.15mm 0.2mm
mdWireWire = 7mil
mdWirePad = 7mil
mdWireVia = 7mil
mdPadPad = 7mil
mdPadVia = 7mil
mdViaVia = 7mil
mdSmdPad = 7mil
mdSmdVia = 7mil
mdSmdSmd = 7mil
mdViaViaSameLayer = 8mil
mnLayersViaInSmd = 2
mdCopperDimension = 7mil
mdDrill = 7mil
mdSmdStop = 0mil
msWidth = 7mil
msDrill = 15mil
msMicroVia = 9.99mm
msBlindViaRatio = 0.500000
rvPadTop = 0.250000
rvPadInner = 0.250000
rvPadBottom = 0.250000
rvViaOuter = 0.250000
rvViaInner = 0.250000
rvMicroViaOuter = 0.250000
rvMicroViaInner = 0.250000
rlMinPadTop = 7mil
rlMaxPadTop = 20mil
rlMinPadInner = 7mil
rlMaxPadInner = 20mil
rlMinPadBottom = 7mil
rlMaxPadBottom = 20mil
rlMinViaOuter = 7mil
rlMaxViaOuter = 20mil
rlMinViaInner = 7mil
rlMaxViaInner = 20mil
rlMinMicroViaOuter = 4mil
rlMaxMicroViaOuter = 20mil
rlMinMicroViaInner = 4mil
rlMaxMicroViaInner = 20mil
psTop = -1
psBottom = -1
psFirst = -1
psElongationLong = 100
psElongationOffset = 100
mvStopFrame = 1.000000
mvCreamFrame = 0.000000
mlMinStopFrame = 4mil
mlMaxStopFrame = 4mil
mlMinCreamFrame = 0mil
mlMaxCreamFrame = 0mil
mlViaStopLimit = 25mil
srRoundness = 0.000000
srMinRoundness = 0mil
srMaxRoundness = 0mil
slThermalIsolate = 10mil
slThermalsForVias = 0
dpMaxLengthDifference = 10mm
dpGapFactor = 2.500000
checkAngle = 0
checkFont = 1
checkRestrict = 1
checkStop = 0
checkValues = 0
checkNames = 1
checkWireStubs = 1
checkPolygonWidth = 0
useDiameter = 13
maxErrors = 50