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INSPECTION, ELECTRICAL & VERIFICATION, PHYSICAL, MECHANICAL & ASSEMBLY, TESTING

Discover a PCB Failure Analysis: the Pad Cratering

  • Posted by Mari Carmen López
  • On March 11, 2019
  • 0
One of the major failure modes encountered in PCB assembly is Pad cratering. This term is coined to describe a fracture at the pad/resin interface (adhesive failure) or within the resin beneath pads (cohesive failure) that extend along the whole pad length (see the figure) and leads to the complete separation of the pad from the PCB. This failure mode is especially relevant for assembled BGA, CGA and bottom termination components fabricated by lead-free and halogen-free processes and it is related to mechanical stresses experienced in PCB systems.
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PHYSICAL, MECHANICAL & ASSEMBLY, TESTING

DC power – Use of Substrate Attach Strength – Die Shear Strength Method

  • Posted by José Cándido Vázquez Cárdeno
  • On February 13, 2019
  • 0
The purpose of the test is to determine the strength of the element attachment system when subjected to force in the Y1 axis, and thus to determine the integrity of materials and processes used to attach semiconductor die or surface mounted elements to package headers or other substrates. The implementation of this test includes material evaluation and process control.
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PHYSICAL, MECHANICAL & ASSEMBLY, TESTING

Test Methods in Electronic parts. The Vibration Tests

  • Posted by María Teresa Rodríguez
  • On February 13, 2019
  • 2
The purpose of vibration tests is to evaluate the effect caused on component parts by vibration in a specified frequency range. The samples are subjected to testing under different conditions, as described below, in accordance with the respective applicable standards. The test conditions differ in terms of duration, frequency range, vibration waveform, amplitude, etc.
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ALTER Laboratory Services, TESTING

Engineering and Testing of Hi Rel Electronic Components

  • Posted by David Ramirez - Cruzado
  • On July 3, 2010
  • 0
The E.E.E. (Electrical, Electronic, and Electromechanical) components are the basic elements of any electronic system which are the fundamental building blocks that determine the final equipment performance, in terms of the electrical performance, mechanical strength, and ability to meet the environmental stresses they will encounter in service.
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