I still don't see how anyone can help you without knowing which specific technology you're using. "BiCmos Process" doesn't cut it. Unless somebody is familiar with the specifics of the process you're using, they're not going to know the benefits and disadvantages of "TopMetal1" and "TopMetal2". They're just names to me - I can't tell you anything about them or why you would choose one over the other. I suspect that is the same for everyone else in these forums unless they a) knew the actual technology you were using and b) were familiar with it. Oh and c) they're not going to break any non-disclosure agreement by revealing information here. That's why I think you need to contact the foundry if their documentation isn't clear... Regards, Andrew.
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