PHOTODIODE ARRAY FOR SPECTROMETRIC MEASUREMENTS AND SPECTROMETRIC MEASUREMENT SYSTEM

A plurality of photodiodes arrayed in a one-dimensional form are divided into a plurality of groups. The structure of an antireflection coating is changed for each group so that all the surfaces of the photodiodes belonging to each group are covered with an antireflection coating having a transmitta...

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Bibliographic Details
Main Authors SUGAWA SHIGETOSHI, TAKUBO KENJI, HIROSE RYUTA, TOMINAGA HIDEKI, KURODA RIHITO
Format Patent
LanguageEnglish
Published 19.02.2015
Subjects
BASIC ELECTRIC ELEMENTS
COLORIMETRY
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT
MEASURING
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
RADIATION PYROMETRY
SEMICONDUCTOR DEVICES
TESTING
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Summary:A plurality of photodiodes arrayed in a one-dimensional form are divided into a plurality of groups. The structure of an antireflection coating is changed for each group so that all the surfaces of the photodiodes belonging to each group are covered with an antireflection coating having a transmittance characteristic which shows a maximum transmittance within a range of wavelengths of light to be received by those photodiodes. In particular, a SiO2 coating layer on the silicon substrate and an Al2O3 coating layer are common to all the photodiodes, while the structure of the upper layers are modified with respect to the wavelength. Within an ultraviolet wavelength region, the coating structure is more finely changed with respect to the wavelength. By such a design, the transmittance can be improved while making the best efforts to avoid a complex manufacturing process.
Bibliography:Application Number: US201314388567