Phuthanate Phoosekieaw and Sanya Khunkhao2554-07-062554-07-062554-05-28Flip chip, Underfill, Tacky flux978-981-08-8637-02010-460Xhttp://dspace.spu.ac.th/handle/123456789/2441The rapid uptake of flip-chip technology within the electronics industry due to their better thermal performance, smaller size, lower profile, light weight, and higher input/output density, the solder joints together with underfill in flip chip package serve as a mechanical mechanism for resisting the thermal deformation induced by the coefficient of thermal expansion (CTE) mismatch between silicon die and substrate. underfill materials are employed in flip-chip assemblies to enhance solder joint reliability performance. The adhesion of underfills with solders is important to the integrity of the flip-chip structure. The effect of temperature and humidity aging as well as flux residue on adhesion strength was also investigated.en-USFlip chip, Underfill, Tacky fluxOther