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IEEE transactions on advanced packaging, 2009-08, Vol.32 (3), p.602-611
2009
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Details

Autor(en) / Beteiligte
Titel
Analytical Solutions for PCB Assembly Subjected to Mismatched Thermal Expansion
Ist Teil von
  • IEEE transactions on advanced packaging, 2009-08, Vol.32 (3), p.602-611
Ort / Verlag
Piscataway, NJ: IEEE
Erscheinungsjahr
2009
Quelle
IEEE Electronic Library Online
Beschreibungen/Notizen
  • Thermal stress due to mismatched thermal expansion is a problem that has challenged the electronics packaging industry for decades. Analytical solutions are available in the literature for a tri-material in which the sandwiched layer is an adhesive, but the solutions may not be suitable for a sandwiched layer consisting of discrete elements such as solder joints which experience significant bending. In this paper, closed-form analytical solutions have been developed for both continuous and discrete sandwiched layers by modelling the interconnects as a slab of spring elements capable of transferring axial, shear, and bending load. The analytical solutions have been successfully validated with finite element analysis.

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