Patent ID: 7038768

Claim:
A measuring apparatus for characterizing a semiconductor multiple layer film comprising: a first light source which generates light for exciting a sample including a semiconductor multiple layer film for measurement of a photoluminescence spectrum of the sample and generates externally modulated light for measurement of a reflection spectrum of the sample; a second light source which generates white light as probe light for measuring the reflection spectrum; a spectrometer which disperses light emitted by the sample for the measurement of the photoluminescence spectrum and disperses the light from said second light source to irradiate the sample for the measurement of the reflection spectrum; a first detector for the measurement of the photoluminescence spectrum, detecting light emitted from said spectrometer and converting the light detected to an electrical signal; a second detector for the measurement of the reflection spectrum, detecting light dispersed by said spectrometer, irradiating the sample, and reflected from the sample; a guide member which selectively guides the white light from said second light source to said spectrometer and permits passage of light emitted from said spectrometer to said first detector; and a controller which makes said guide member guide the white light from said second light source to said spectrometer, acquires electrical signals from said second detector for the measurement of the reflection spectrum, makes said guide member pass the light emitted from said spectrometer to said first detector, and acquires electrical signals from said first detector for the measurement of the photoluminescence spectrum.