Constant Acceleration Testing

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Constant acceleration testing is a centrifugal test performed to simulate constant acceleration effects on microelectronic devices. This test is designed to indicate types of mechanical and structural weaknesses not necessarily detected in vibration or mechanical shock testing. Constant acceleration is a high-stress test used to determine the mechanical limits of the package and other elements such as the internal metallization and lead system, the attachment of its die or substrate, and the robustness of its wire bonds.

At lower, non-destructive levels of stress settings it may also be utilized as a 100% in-line screen to detect and eliminate packages that exhibit lower than nominal mechanical strengths in any of its structural elements. Unless specified otherwise, the required constant acceleration value shall be applied to each of the package’s six orientations. For packages with internal elements mounted with the major plane perpendicular to the Y axis, the Y1 orientation is defined as the one that tends to displace the elements from their mount.

 

Test Specifications / Standards

  • MIL-STD-883, Method 2001
  • AEC-Q100
  • MIL-STD-202, Method 212A
  • MIL-STD-750, Method 2006
  • AEC-Q101