DBC SUBSTRATE PARAMETERS

Type Item (Value) (Unit)

AIN Ceramic
 Thickness 0.635,0.5,0.38 mm
 Density 3.3 g/cm3
 Thermal Conductivity(25℃) 170 W/m.k
 Bending Strength 400 Mpa
 Dielectric Constant (1MHz) 9.0  
 Dielectric Loss (1MHz,25) 0.0003  
 Dielectric Strength 20 kV/mm
 Resistivity(25℃) 1*1014 Ωcm

 

 


Al203 Ceramic
 AI2O3 Content >96
 Thickness 1.00,0.76,0.63,0.5,0.38,0.32,0.25 mm
Density 3.78 g/cm3
 Thermal Conductivity(25℃) 24 W/m.k
 Bending Strength 400 Mpa
Dielectric Constant (1MHz) 9.8  
 Dielectric Loss (1MHz,25) 0.0003  
Dielectric Strength 15 kV/mm
 Resistivity(25℃) 1*1014 Ωcm

 

 

Material Item 数值(Value) 单位(Unit)

Copper
 Material 无氧铜OFHC mm
 Copper Thickness 0.40,0.30,0.25,0.20,0.127

 

 


DBC Substrate
Max.Useable area(Max) 127*178 mm
 Line Spacing(Min) 0.5 mm
Line Width(Min) 0.5 mm
 CTE(Normaly) 7.4*10—6 K—1
 Peeling Strength(Min) >5 N/mm
 Solderability >95%  
Surface Treatment
Bare Copper/Solder Stop/Ni-Plating/Au-Plating
 

 

 

Type Item AIN SI3N4 AI2O3
(96%)
ZTA
(ZrO29%)

General Information
 Density(g/cm3) 3.3 3.22 3.75 4.0
 Thickness (mm) 1.0/0.635/0.38 0.32/0.25 1.0/0.635/0.38 0.32
 Roughness(μm) Ra≤0.3 Ra≤0.4 Ra≤0.4 Ra≤0.4

Mechanical Performance
 Bending Strength(MPa) 450 800 400 700
 Young's modulus (GPa) 320 310 330 310
 Vickers-hardness(GPa) 11 15 14 15
 Fracture Toughness(MPa*M1/2) 3.0 6.5 3.0 3.5

Thermal Properties
CTE
10—6/K(40-400℃)
4.6 2.6 6.7 7.1
 Thermal Conductivity(W/M*K)25℃ 180 85 24 27

Electrical Properties
 Dielectric Constant 1MHz 9.0 9.0 9.8 10.2
 Dielectric Loss 1MHz 0.2×10-3 0.2×10-3 0.2×10-3 0.2×10-3
 Resistivity 2℃,(Ω*M) >1014 >1014 >1014 >1014
 Dielectric strength (KV/mm) >15 >15 >15 >15
Type Material AIN SI3N4 AI2O3
(96%)
ZTA
(ZrO29%)

Characteristic of Copper Foil
 Content Cu≥99.97%,O₂≤0.003%,Impurity≤0.03%
 Electrical Conductivity 100% IACS
 Mechanical Properties Hardness:HV80-90,Tensile strength:245-345(MPA)

Characteristic of Brazing Alloy
 Content AgCuTi Alloy, lead-free, compliant with RoHS standards

AVAILABLE MATERIAL & COPPER THICKNESS

MaterialType Thickness
(mm)
Copper Thickness(mm)
0.127 0.2 0.25 0.3 0.4 0.5 0.6 0.8
SI3N4 0.25 —— —— —— —— —— ——
0.32 —— —— —— —— —— ——
AIN 0.32 —— —— ——
0.38 —— —— ——
0.64 —— —— ——
1 —— —— ——
AL2O3 1.0/0.76/
0.64/0.38/
0.32
—— —— ——

AVAILABLE SIZE OF STANDARD CERAMIC SUBSTRATE

 Type Dimension(Inch/mm) Maximum size for Circuit(mm)
AIN/Si3N4/AI2O3/ZTA 4.5"×4.5"/114.3×114.3 110×110
5.5"×7.5"/139.7×190.5 135×185

 

Note: Laser Scribbing tolerance ≤±0.15mm

DBC SUBSTRATE'S PERFORMANCE TEST

Testing Items Standards & Methods Capability
(Copper thickness 0.3mm)
Porosity Test X-ray & SAT Porosity of copper foil and substrate
≤0.3%(50μm Resolution)
Initial Peeling Test of Copper Foil IPC-TM650 2.4.8 Initial Peeling Strength ≥8N/m㎡
Thermal Shock Test GJB548B-2005-1010 ℃
MIL-STD-883J-1010 ℃
(﹣55℃↔+150℃)
AIN≥1000 times
Si3N4≥4000 times
ZTA≥1000 times
Al2O3≥500 times
Solderability Test J-STD-003 TEST A1 Welding Area≥97%

 

Note:Sample Size is 40*30mm,thickness of 0.635mm, double-sided copper thickness of 0.3mm.

SURFACE TREATMENT CAPABILITY

Plating Imm Ni: 3μm - 7μm (8%±2%P)
Imm Au:0.025-0.1μm(Ni-Au,Ni-Pd-Au)
Imm Ag:0.1-1um
OSP :0.2-0.6μm
Roughness Ra≤3μm; Rz≤7μm;Rmax=20μm
Evenness ≤0.3%(The evenness may vary due to the different pattern of Circuit.)

 

Varied Plating,roughness and fishining are avaiable.