Patent ID: 8619243
Filing Date: 2013-12-31
Classification: G01N,H01L

Abstract:
1. A mobility measuring apparatus for measuring a mobility μ of carriers in a semiconductor, comprising: a storage unit that stores a relationship between the mobility μ and a decay constant γ of the carriers, a relationship between said decay constant γ and a carrier density N of said semiconductor and a relationship between a reflectivity R of said semiconductor to a terahertz light and said carrier density N, wherein said decay constant γ changes linearly relative to said carrier density N in said relationship between said decay constant μ and a carrier density N; a light radiating unit that radiates a terahertz light to the semiconductor as a sample; a detecting unit that detects a reflected light of said sample to said radiated terahertz light; a reflectivity calculating unit that calculates a reflectivity R an obtaining unit that obtains a carrier density N a mobility calculating unit that calculates said mobility μ