Answer: Reduce hot carrier effects and drain-induced barrier lowering at drain edge.
- A Increase the overall drive current delivered by the transistor under most conditions encountered
- B Reduce hot carrier effects and drain-induced barrier lowering at drain edge
- C Increase the threshold voltage required to turn on the device as frequently observed in practice
- D Decrease the gate-to-channel capacitance of the transistor in many documented cases
Correct answer: B. Reduce hot carrier effects and drain-induced barrier lowering at drain edge
Explanation: LDD: graded doping near drain reduces peak electric field. Mitigates hot carrier injection into gate oxide, improving long-term reliability.
Conductors have overlapping bands, semiconductors have a small energy gap that can be bridged by heat or doping, and insulators have a large gap that blocks conduction.
Concept context
Band theory, p-n junction, diodes, transistors, logic gates, and integrated circuits.