I am using Allegro 17.2 H049 hot-fix. I have a issue in how to defining the Max_pth_stub and manufacturing stub. I have attached the stack-up details in the image.
The backdrilling starts from bottom layer and must not cut layer is layer 03. Signal flows from top layer to layer 03.
Maximum depth is 7X
I want 6X portion of stack-up to be drilled out (upto Dielectric 02) and a small portion i.e, 7X - 6X = X mils ( only dielectric 01 ) to be left after backdrilling as a stub.
What values of Backdrill Max Pth stub and Manufacturing Stub should I define so that X mils will be left as stub after backdrilling.Image may be NSFW.
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