Solar Cell Business Unit

1. Front and back contacts are weldable or solderable
2. Cells are fully tested under AM1.5D illumination

1. Front and back contacts are weldable or solderable
2. Cells are fully tested under concentrated illumination

1. Triple junction solar cell (InGaP/InGaAs/Ge)
2. Front and back contacts are weldable or solderable.
3. Cells are 100% tested under AM0 illumination

1. Growth by MOCVD tech.
2. High efficiency, triple junction solar cell, with n-on-p polarity on Ge substrate

1. Has been certified by International
Electrotechnical Commission (IEC)
2. Has constructed numerous HCPV facilities

Class 1,000 yellow room equipped with photo-resist spray coater, mask aligner, photo-developer, oven, spin dryer and hot N2 dryer.
Epiwafer size processed is from 2- to 6-inch .

Equipment including acid wet bench, alkaline wet bench, organic clean wet bench and photo-resist strip bench.

Equipment including two E-beam evaporators for contact metallization and a rapid thermal anneal (RTA) set-up for contact annealing.
Thickness uniformity is well controlled.
Evaporation angle is also well controlled. Front metal gridline profile is >80 degrees.

High-speed rotated diamond dicing equipments are used for saw dicing.
Dicing width and depth are well controlled.
Chipping and breakage have been reduced to very minimal.
Heat generated from dicing is reduced by in-situ water cooling system.

Solar simulator is utilized for measuring optical-electrical transfer efficiency on wafer, chip and sub-mount level.
The concentration ratio of simulator can be adjusted from 1- to 2,000-suns.
Quantum efficiency (QE) measurement set-up is used to measure cell QE from 300 nm to 1800 nm spectral wavelengths.

Arima PV&O utilizes MOCVD technology to grow epitaxial wafers.

Standard wafer size is 4-inch. Other wafer sizes including 2 inch, 3 inch and 6 inch are also available.
Arima PV&O’s standard epitaxial products are
GaInP/InGaAs/Ge triple junction solar epi wafers,
GaInP/GaAs dual junction solar epi wafers and
GaAs single junction solar epi wafers.

Other customized epi wafer is also available upon request.