Interconnect processes

What is the phenomenon called in which current flowing through the resistance of power wiring lowers the supply voltage that reaches circuits?

  1. AIR drop
  2. BCrosstalk
  3. CDIBL
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Answer: A. IR drop

Power wiring has resistance, so when current I flows, an I × R voltage drop occurs and the voltage reaching circuits falls. This is called IR drop, which slows circuits and can cause malfunctions. It is reduced by widening power wires and arranging them in a mesh.

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More Interconnect processes questions

  1. What is the phenomenon called in which, through capacitive coupling between adjacent wires, a signal change on one wire appears as noise on the other?
  2. What is the main purpose of placing a cap layer such as cobalt on top of copper wiring?
  3. In Black's equation for wire lifetime under electromigration, which factors shorten the lifetime?
  4. Which is closest to the number of wiring layers in advanced logic LSIs?
  5. What is an advantage of metals such as ruthenium (Ru), being considered as alternatives to copper for fine wiring?