Document Type
Article
Publication Date
1-1-2021
Abstract
Due to the variation of temperature during service, the leads in quad flat packages (QFP) and plastic leaded chip carrier (PLCC) undergo high thermal stress, which can lead to large deformation and failure. Thus, the prediction of thermal stress and strain distributions is a prerequisite for reliability analysis of such components. Along this line, this work analyzed the performances for gull wing and J-lead with different geometries. The thermal stress and strain distributions of both leads were determined by using the finite-element method (FEM). For each type of the lead, a parametric study was conducted in order to evaluate the effect of lead geometry on stress and strain distributions. Based on the simulation results, an optimum lead design was suggested. In addition, simulation work of package under thermal cyclic loading has been done, accumulated creep strain was found in the critical location of solder in package, and lifetime was predicted. © 2011-2012 IEEE.
Keywords
Finite-element analysis (FEA), geometry, quad flat package (QFP), reliability, thermal stress
Divisions
fac_eng
Funders
University of Malaya Partnership Grant RK003-2016A
Publication Title
IEEE Transactions on Components, Packaging and Manufacturing Technology
Volume
11
Issue
3
Publisher
Institute of Electrical and Electronics Engineers