DOWA Dowa Electronics Materials Co., Ltd.
DOWA

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High Purity Metals
LED
Communication
Sensor
Lighting iInfraredj
Display
GaAs-sub
Laser grade
LED grade
Semi-insulating
AlN Template

GaAs

Laser grade
LED grade
Semi-insulating

Laser grade
Growth Method Vertical Gradient Freezing
Conduction Type
(Dopant)
N-typeFSi
Carrier
Concentration
N-type 0.5-4~1018 cm-3
(Can be specified within this range)
Dislocation Density
(EPD)
(Average) Typical Grade <500cm-2
(Maximum) Typical Grade <2000cm-2
Size 4" 3" 2"
Orientation 1. (100)}0.1
2. (100) off }0.1 towards (011) or (01-1) etc.
3. Customer's request
Diameter (mm) 100.0}0.1 76.0}0.1
76.2}0.1
50.0}0.1
50.8}0.1
Thickness (m) 450-625
}15
350-600
}15
300-450
}15
Orientation
Flat
(mm) Cleaved Primary Flat is available on request

Length
iPrimaryj
iSecondaryj


32.5}1.0
18.0}1.0

22.0}1.0
12.0}1.0

16.0}1.0
8.0}1.0
Location
iPrimaryj
iSecondaryj

EJ (Dove-Tail)A(0-1-1)}0.5*A(0-11)}0.5
or
SEMI US (V-Groove)A(01-1)}0.5*A(011)}0.5

}0.05 (*Cleaved)

Edge Rounding Bevelled
Flatness TTV(m)
Warpim)
<5.0
<10.0
<5.0
<10.0

<5.0
<10.0

Surface
Finish
Front Mirror
Back Lapped and etched
Mirror is available on request
Surface Treatment Epi-ready
Laser Marking Option
Packing Fluoroware individual container
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LED grade
Growth Method Vertical Gradient Freezing
Conduction Type
(Dopant)
N-typeFSi
Carrier
Concentration
N-type 0.5-4~1018 cm-3
(Can be specified within this range)
Dislocation Density (EPD) (Maximum) Typical Grade <5000cm-2
Size 4" 3" 2"
Orientation 1. (100)}0.1
2. (100) off }0.1 towards (011) or (01-1) etc.
3. Customer's request
Diameter (mm) 100.0}0.2 76.0}0.2
76.2}0.2
50.0}0.2
50.8}0.2
Thickness (m) 350-625
}20
300-600
}20
250-350
}20
Orientation
Flat
(mm)  

Length
iPrimaryj
iSecondaryj


32.5}1.0
18.0}1.0

22.0}1.0
12.0}1.0

16.0}1.0
8.0}1.0
Location
iPrimaryj
iSecondaryj

EJ (Dove-Tail)A(0-1-1)}0.5*A(0-11)}0.5
́A
SEMI US (V-Groove)A(01-1)}0.5*A(011)}0.5

Edge Rounding Bevelled
Flatness TTV(m)
Warpim)
<10.0
<15.0
<10.0
<15.0

<10.0
<15.0

Surface
Finish
Front Mirror
Back Lapped and etched
Surface Treatment Epi-ready is available on request
Laser Marking Option
Packing 25 wafers box or Fluoroware individual container
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Semi-insulating
Growth Method Liquid Encapsulated Czochralski
Conduction Type (Dopant) Semi-Insulating type : (Undoped (C-doped))
Resistivity (at 25 degree C) 1-5~107 cm
Higher resistivity range is available on request
Dislocation Density (EPD) (Average) <105 cm-2
Size 4" 3" 2"
Orientation 1. (100)}0.1
2. (100) off 2}0.1 towards (110)
3. Customer's request
Diameter (mm) 100.0}0.1
76.0}0.1
76.2}0.1
50.0}0.1
50.8}0.1
Thickness (m) 450-625
}15
350-625
}15
300-450
}15
Orientation
Flat
(mm)  

Length
iPrimaryj
iSecondaryj

32.5}1.0
18.0}1.0
22.0}1.0
12.0}1.0
16.0}1.0
8.0}1.0
Location
iPrimaryj
iSecondaryj

EJ (Dove-Tail)@(0-1-1)}0.5@(0-11)}0.5
or
SEMI US (V-Groove)@(01-1)}0.5@(011)}0.5

Edge Rounding Bevelled
Flatness TTV(m)
TIR(m)
Warpim)
LTVim)
*
<3.0
<3.0
<5.0
<1.0
15 ~ 15 mm

<3.0
<3.0
<5.0
<1.0
15 ~ 15 mm

<5.0
<3.0
<8.0
-
@

Surface Finish Front Mirror
Back Mirror@@Lapped and etched
Surface Treatment Epi-ready is available on request for MOCVD and MBE
Laser Marking Option
Packing 25 wafers box or Fluoroware individual container
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