GK Question

technology medium mcq

Which material is commonly used as substrate for silicon semiconductor manufacturing?

  1. Sapphire
  2. Silicon Wafer
  3. Glass
  4. Plastic

Answer: Silicon Wafer

Silicon wafers (single-crystal, polished discs) are foundational substrate for IC fabrication due to: abundance, mature processing, and suitable electronic properties. Compound semiconductors (GaAs, SiC) used for specialized applications. Critical for understanding chip manufacturing basics.

Topic Semiconductor Technology
Exam Relevance UPSC, Banking, SSC