Electronic Grade

Used for diodes and transistors,

Infrared or opitical Grade

Used for IR optical window or disks,opitical components

Cell Grade

Used for substrates of solar cell 

Standard Specs of  Germanium Crystal and wafer

Crystal Orientation

<111>,<100> and <110> ± 0.5^o or custom orientation

Crystal boule as grown

1" ~ 6" diameter  x  200 mm Length

Standard blank as cut

1"x 0.5mm

2"x0.6mm

4"x0.7mm

5"&6"x0.8mm 

Standard Polished wafer(One/two sides polished)

1"x 0.30 mm

2"x0.5mm

4"x0.5mm

 5"&6"x0.6mm

Special size and orientation are available upon requested  Wafers

4 inch Ge wafer Specification

Doping

P

Doping substances

 Ge-Ga

Diameter

 100±0.25 mm

Orientation

(100) 9° off toward <111>+/-0.5

Off-orientation tilt angle

N/A

Primary Flat Orientation

N/A

Primary Flat Length

32±1

mm

Secondary Flat Orientation

 N/A

Secondary Flat Length

N/A

 mm

cc

(0.26-2.24)E18

/c.c

Resistivity

(0.74-2.81)E-2

ohm.cm

Electron Mobility

382-865

cm2/v.s.

EPD

<300

/cm2

Laser Mark

N/A

Thickness

175±10

 μm

TTV

＜15

μm

TIR

N/A

μm

BOW

 <10

μm

Warp

＜10

μm

Front face

 Polished

Back face

 Ground