Effect of elastic recovery on the electrical contact resistance in anisotropic conductive adhesive assemblies

2006 ◽  
Vol 29 (1) ◽  
pp. 137-144 ◽  
Author(s):  
M. Chin ◽  
J.R. Barber ◽  
S.J. Hu
Keyword(s):  
Contact Resistance ◽  
Elastic Recovery ◽  
Electrical Contact ◽  
Conductive Adhesive ◽  
Electrical Contact Resistance ◽  
Anisotropic Conductive Adhesive

scholarly journals Design Guidelines for Anisotropic Conductive Adhesive Assemblies in Microelectronics Packaging

2005 ◽  
Author(s):  
M. Chin ◽  
S. J. Hu ◽  
J. R. Barber
Keyword(s):  
Contact Resistance ◽  
Adhesion Strength ◽  
Modulus Of Elasticity ◽  
Elastic Recovery ◽  
Electrical Contact ◽  
Design Guidelines ◽  
Conductive Adhesive ◽  
Electrical Contact Resistance ◽  
Bonding Force ◽  
Anisotropic Conductive Adhesive

The multiple parameters that are involved in the design of anisotropic conductive adhesive (ACA) assemblies, and the overlapping influences that they have on the final electrical contact resistance, represent a difficult challenge for the designers. The most conflicting parameters include initial bonding force F, number of particles N, adhesion strength GA, and modulus of elasticity E of the cured resin. It is well known that as the bonding force increases, the contact resistance decreases. However, when the bonding force reaches a certain maximum value, the contact between conductive particle and conductive track is disrupted due to delamination of the cured resin during the elastic recovery. The authors have shown in previous studies that the delamination is caused by high residual stresses and that it depends largely on the adhesion strength of the assembly and on the modulus of elasticity of the cured resin. Additionally, the authors have provided a methodology to quantify the maximum threshold value of the bonding force for different numbers of particles trapped between mating conductive tracks. In this paper, the relationships between contact resistance R and each one of these conflicting parameters are systematically combined to create design diagrams that give regions of robust design. It is found, for example, that for particles of radius 5μm, E = 0.9 GPa, GA = 50 J/m2, and 2 ≤ N ≤ 5, the required bonding force to achieve contact resistance within the range 7 < R < 40 mω, is 2.5 < F < 20mN.

scholarly journals Design Guidelines for Anisotropic Conductive Adhesive Assemblies in Microelectronics Packaging

2008 ◽  
Vol 130 (2) ◽  
Author(s):  
Melida Chin ◽  
S. Jack Hu ◽  
James R. Barber
Keyword(s):  
Contact Resistance ◽  
Adhesion Strength ◽  
Modulus Of Elasticity ◽  
Elastic Recovery ◽  
Electrical Contact ◽  
Design Guidelines ◽  
Conductive Adhesive ◽  
Bonding Force ◽  
Anisotropic Conductive Adhesive ◽  
Number Of Particles

Multiple parameters are involved in the design of anisotropic conductive adhesive assemblies, and the overlapping influences that they have on the final electrical contact resistance represent a difficult challenge for the designers. The most important parameters include initial bonding force F, number of particles N, the adhesion strength GA, and modulus of elasticity E of the cured resin. It is well known that as the bonding force increases, the contact resistance decreases. However, when the bonding force reaches a certain maximum value, the contact between conductive particle and conductive track is disrupted due to delamination of the cured resin during the elastic recovery. The authors have shown in previous studies that the delamination is caused by high residual stresses and that it largely depends on the adhesion strength of the assembly and on the modulus of elasticity of the cured resin. Additionally, the authors have provided a methodology to quantify the maximum threshold value of the bonding force for different numbers of particles trapped between mating conductive tracks. In this paper, the relationships between contact resistance R and each one of these parameters are systematically investigated to create diagrams that give regions of robust design. Given the number of particles and their size, adhesion strength, and modulus of elasticity of the resin, the required bonding force can be found in order to achieve a desired range in contact resistance.

Discrete drops in the electrical contact resistance during nanoindentation of a bulk metallic glass

2016 ◽  
Vol 108 (18) ◽  
pp. 181903 ◽  
Author(s):  
Gaurav Singh ◽  
R. L. Narayan ◽  
A. M. Asiri ◽  
U. Ramamurty
Keyword(s):  
Metallic Glass ◽  
Contact Resistance ◽  
Bulk Metallic Glass ◽  
Electrical Contact ◽  
Electrical Contact Resistance
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