Stuctural analysis of lead frame design of dual row quad flat no lead package (QFN) using ansys / Nur Atiqah Mohamad Maksom

This study presents the mechanical characteristics on the stress of the Dual Row Quad Flat No Lead (DR-QFN) of a 44 lead DR-QFN package on the staggered lead frame design and 48 lead DR- QFN package on the inline lead frame design. The steadystate structural analysis of DR-QFN package with different lead frame design is performed using ANSYS software. Reducing the lead frame thickness is the other technique presented in this study. This is to analyze the stress behavior in the DRQFN package. The 3D models used in this study were built using finite element method with SOLID 70 and MESH 200 element types. From the study, results show that thinner lead frame gives a smaller value of stress. DR-QFN package with lead frame thickness of 0.15 mm has about 6% smaller value of stress compared to package with lead frame thickness of 0.20 mm. For lead frame configuration analysis, staggered and inline lead frame design, the staggered configuration has about 0.55% smaller value of stress compared to inline configuration.