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Reliability with Smart Composite Products

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AlSiC Microwave HousingsMicrowave Housings

AlSiC provides an ideal material for microwave packaging applications. In fact CPS developed the AlSiC material and the net-shape manufacturing process for electronic packaging in 1987 for the Advance Microwave Packaging and Monolithic Microwave Module IC programs.

AlSiC CTE compatibility with assembly components

AlSiC CTE compatibility with device and assembly improve reliability by minimizing thermally induced cycling stresses.
Direct device attachment is possible with AlSiC-9

  • Stress compensation materials are not necessary
  • Thermal dissipation is improved as assembly thermal resistance is decreased without stress compensation layers.

AlSiC has a good thermal conductivity for thermal dissipation.

Direct device attachment is possible with AlSiC-9
  • Stress compensation materials are not necessary
  • Thermal dissipation is improved as assembly thermal resistance is decreased without stress compensation layers.

AlSiC material is light weight making it ideal for weight sensitive applications

  • AlSiC is 1/3 the weight of Cu or Steel
  • AlSiC is 1/5 the weight of CuMo
  • AlSiC is 1/6 the weight of CuW

AlSiC's light weight coupled with  high strength and stiffness improves product assembly shock and vibration tolerance.

Lighter weight, high-strength, and stiffness materials  are more  shock and  vibration tolerant

AlSiC cast shape capability allows for more functional lid designs incorporating:

  • Net shape precision cast fabrication for cost effective serial production
  • Die cavities/pedestals
  • Alignment features
  • Allows for more functional designs
  • AlSiC offers good dimensional control
AlSiC is a dense and hermetic material

Provides environmental protection having a hermeticity value of < 1 x 10-9  Atm-cm3/s He leak rate.

M3G DC/DC Converter for Space Applications:
  • Hermetic Packaging with AlSiC Base Alloy 48 Seal Ring and Ceramic Feedthus - Go ask Cheryl about 1599
  • 100 cycles thermal shock per MIL-STD 883 1011 (subgroups 1 - 4, and 6)


Right  is a large AlSiC-9 composite component for a microwave phased array radar application that is approximately 12 inches (300 mm) in diameter and 3 inches (75 mm) in height.  It is important to note all the wall features that extend the depth of this product were as-cast (no post machining).  Right is a large AlSiC-9 composite lid that was fabricated for the above system.  Again features provided in this product were as-cast (no post machining).