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what is the purpose of contact and buyer
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roles in CMOS design contact and buyer
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rules in CMOS design Define how
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interconnections between layers are
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formed contacts connect metal to active
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or polysilicon layers while gas connect
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to metal layers the minimum size of a
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contact hole is excellent and the
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polysilicon and diffusion layers must
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extend at least buying beyond the
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contact hole area this determines the
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minimum area of contact these rules
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impact the design and routing of
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interconnections in CMOS circuits via
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balanced substrate contacts important in
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CMOS design answer well and substrate
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contacts and CMOS design are essential
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for connecting the welven substrate
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regions to supply voltages failing to
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establish these connections can result
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in resistive paths between substrate
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contacts and Supply rails potentially
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leading to parasitic effects like latch
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up these contacts ensure the proper
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operation and reliability of CMOS
