Interfacial fracture toughness test methodology for flip chip underfill encapsulant

2003 ◽  
Author(s):  
H.L.J. Pang ◽  
X.R. Zhang ◽  
C.H. Lim ◽  
X.Q. Shi ◽  
Z.P. Wang
Keyword(s):  
Fracture Toughness ◽  
Flip Chip ◽  
Interfacial Fracture ◽  
Fracture Toughness Test ◽  
Interfacial Fracture Toughness ◽  
Test Methodology ◽  
Toughness Test ◽  
Underfill Encapsulant

Two Test Specimens for Determining the Interfacial Fracture Toughness in Flip-Chip Assemblies

1998 ◽  
Vol 120 (2) ◽  
pp. 150-155 ◽  
Author(s):  
X. Yan ◽  
R. K. Agarwal
Keyword(s):  
Fracture Toughness ◽  
Critical Loads ◽  
Flip Chip ◽  
Interfacial Strength ◽  
Interfacial Fracture ◽  
Circuit Board ◽  
Interfacial Fracture Toughness ◽  
Edge Cracks ◽  
Solder Mask ◽  
Point Bend

Two test specimens are developed to measure interfacial fracture toughness in flip-chip assemblies. The specimens consist of three layers: silicon chip, underfill, and circuit board. Two symmetric edge cracks are embedded along the interface, either between the chip and the underfill or between the underfill and the circuit board. The specimens are subjected to four-point-bend loading and critical loads are obtained. Analytical solutions for energy release rate have been derived for these two specimens and used to obtain the toughness from the measured critical loads. These specimens have been used to evaluate material combinations of chip passivation, underfill and solder mask for desired interfacial strength.

scholarly journals Evaluation of the Interfacial Fracture Toughness of Anodic Bonds

2007 ◽  
Vol 73 (735) ◽  
pp. 1266-1272 ◽  
Author(s):  
Yoshiaki NOMURA ◽  
Masaki NAGAI ◽  
Toru IKEDA ◽  
Noriyuki MIYAZAKI
Keyword(s):  
Fracture Toughness ◽  
Interfacial Fracture ◽  
Interfacial Fracture Toughness

Experimental Investigation on Relative Crack Length For Fracture Toughness of Concrete

2010 ◽  
Vol 146-147 ◽  
pp. 1524-1528 ◽  
Author(s):  
Xue Zhi Wang ◽  
Zong Chao Xu ◽  
Zhong Bi ◽  
Hao Wang
Keyword(s):  
Fracture Toughness ◽  
Experimental Investigation ◽  
Crack Length ◽  
Fracture Toughness Test ◽  
Test Results ◽  
Toughness Test ◽  
Wedge Splitting Test ◽  
Splitting Test ◽  
Wedge Splitting

The wedge splitting test specimens with three series of different relative crack length were used to study the influences of relative crack length on the fracture toughness of common concrete. The suitable formulation for fracture toughness of concrete with different relative crack length was gotten on comparing between fracture toughness test results and computation results of the model developed from Hu formula.

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