Hi Mike,Originally posted in cdnusers.org by cadpro2k
Actually for Option 1, using v15 (.1,.5,.7) and some time back, you can define the constraints area to adhere to all the 'other layer' properties (.3mm), and only set the Top Layer to something different (.2mm). I'd do it by copying the DEFAULT constraint (.3mm) and having a "BREAKOUT" physical property with Top Layer at .2mm. This will route from the device (constraint) area at .2mm width, then change to .3mm beyond the area.
I do this with my BGA that route out of my constraint with .1mm, then changes to .125mm once I'm beyond the BGA breakout. I can set my internal layers to anything else, if I want, by mod'ing the PHYSICAL CONSTRAINTS.