Mechanics Of Adhesively Bonded Flip-Chip-On-Flex Assemblies. Part I: Durability Of Anisotropically Conductive Adhesive Interconnects

Author(s):  
J. Haase ◽  
P. Iyer ◽  
P. Baumgartner ◽  
A. Dasgupta ◽  
J. F. J. Caers ◽  
...  
2008 ◽  
Vol 22 (14) ◽  
pp. 1733-1756 ◽  
Author(s):  
J. Haase ◽  
D. Farley ◽  
P. Iyer ◽  
P. Baumgartner ◽  
A. Dasgupta ◽  
...  

Author(s):  
Muthiah Venkateswaran ◽  
Peter Borgesen ◽  
K. Srihari

Electrically conductive adhesives are emerging as a lead free, flux less, low temperature alternative to soldering in a variety of electronics and optoelectronics applications. Some of the potential benefits are obvious, but so far the adhesives have some limitations as well. The present work offers a critical evaluation of one approach to flip chip assembly, which lends itself particularly well to use with a high speed placement machine. Wafers were bumped by stencil printing of a thermoset conductive adhesive, which was then fully cured. In assembly, the conductive adhesive paste was stencil printed onto the pads of a printed circuit board and cured after die placement. The printing process was optimized to ensure robust assembly and the resulting reliability assessed.


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