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Hi, I am using the etch function in xsection tool.
I would like to etch via holes across several material layers, and at various locations stop at specific metal layers.
mask(via).etch(1 :into => [material1, material2, material3], :taper => 10)
However, what happens is that this etch does not stop at metal layers, but just jumps over the metal layers. So I ended up with hanging metal bridges with if the metal layer is somewhere between material1, 2, 3. I cannot just specify a specific height because sometimes etching stops at metal layer between material1 and 2, sometimes between 2 and 3, sometimes at bottom of 3. It depends on the metal layout.
How can I make it so that the via etch process at specific locations stops when hitting specified metal materials in xsection drawing?