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CN & CF Series
Al-SiC Heat Spreaders
 
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ABOUT Heat Spreaders: Heat spreaders are made from Aluminum mixed with Silicon-Carbide particles (AlSiC). This combination results in a low CTE composite that is able to dissipate heat generated by the die on ceramic CCGA packages. AlSiC have high thermal conductivity and low thermal expansion compatible with semiconductor silcon chips and ceramic substrates enabling higher performance to prevent fatigue failure. The AlSiC heat spreader is attached directly to the top of the power chip using a thermal interface material (TIM) such as SE 4450 Adhesive. The thermal conductivity rate of AlSiC permits chip heat to be distributed evenly with higher performance for reliability and stability. AlSiC-8 material composition is 37% volume of Al and 63% volume of SiC. The heat sink is plated with electroless nickel (Ni) 4~8 um (157~315 micro-inch) thickness.
 
 
 
 
CN Style Heat Spreader Cover
  
DWG CCGA Size (mm) Max Die Height Part Number Supports Material SolidWorks
Model
111310 31mm 1.95mm CN-CAP31A 4-Corner Posts AlSiC Model
111320 32.5mm 1.95mm CN-CAP32A 4-Corner Posts AlSiC Model
111350 35mm 1.95mm CN-CAP35A 4-Corner Posts AlSiC Model
111370 37.5mm 1.95mm CN-CAP37A 4-Corner Posts AlSiC Model
111400 40mm 1.95mm CN-CAP40A 4-Corner Posts AlSiC Model
111420 42.5mm 1.95mm CN-CAP42A 4-Corner Posts AlSiC Model
111450 45mm 1.95mm CN-CAP45A 4-Corner Posts AlSiC Model
111520 52.5mm 1.95mm CN-CAP52A 4-Corner Posts AlSiC Model
111000 All 1.95mm CN-CAP ALL 4-Corner Posts AlSiC Model
 
 
 
 
CF Flat Style Heat Spreader Cover
  
DWG CCGA Size (mm) Heatspreader
Thickness
Part Number Style Material SolidWorks
Model
112033 35 x 35mm 1.0mm CF4-CAP33C Flat Lid
Cloverleaf Design
AlSiC Heatspreader Model

Attached to
CCGA Model
 
 
 
 
MATERIAL SPECIFICATIONS
Material Density
g/cm3
CTE
ppm/oC
[25~150°C]
Youngs
Modulus
GPa
Thermal
Conductivity
W/mK @25°C
Fracture
Toughness
MPa*m1/2
Mohs Scale
of Hardness
Bending
Strength
AlSiC-8
37% Vol Al
63% Vol SiC
2.83 8~9 188 170~189 8 8~9 3200
 
 
 
Recommended Thermally Conductive
SE 4450 Adhesive
for Attaching Heat Spreaders to Ceramic Substrates
 
 
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