Investigation of Joule heating effect in various stages of electromigration in flip-chip solder joints by infrared microscopy

2010 ◽  
Author(s):  
Hsiang Yao Hsiao ◽  
Chih Chen ◽  
D. J. Yao
Keyword(s):  
Joule Heating ◽  
Flip Chip ◽  
Solder Joints ◽  
Heating Effect ◽  
Infrared Microscopy ◽  
Joule Heating Effect

Investigation of Joule Heating Effect in Various Stages of Electromigration in Flip-chip Solder Joints by Infrared Microscopy

2010 ◽  
Vol 1249 ◽  
Author(s):  
Hsiang Yao Hsiao ◽  
Chih Chen ◽  
D. J. Yao
Keyword(s):  
Joule Heating ◽  
Flip Chip ◽  
Solder Bump ◽  
Solder Joints ◽  
Void Nucleation ◽  
Heating Effect ◽  
Infrared Microscopy ◽  
Joule Heating Effect ◽  
Last Stage ◽  
A Current

AbstractThe Joule heating effect at various stages under electromigration of flip-chip Sn3.5Ag solder joints was investigated under a current of 0.5 A at 100°C. During various stages of electromigration, voids may form and propagate and Joule heating effect may vary at different void sizes. To verify the void nucleation and propagation on Joule heating effect during electromigration process, the solder bump was stressed for different lengths of time and then examined by Kelvin bump probes and infrared microscopy. We found that voids started to form at approximately 1.2 times of the initial bump resistance. Then the voids propagated when the bump resistance increased. In addition, the temperature of the solder joints increased with the bump resistance and the increase of current stressing time. It increased very slowly in initial stages. In the last stage, the temperature of the solder bump increased rapidly due to the increase of the bump resistance and the local Joule heating effect.

Infrared microscopy of hot spots induced by Joule heating in flip-chip SnAg solder joints under accelerated electromigration

2006 ◽  
Vol 88 (2) ◽  
pp. 022110 ◽  
Author(s):  
S. H. Chiu ◽  
T. L. Shao ◽  
Chih Chen ◽  
D. J. Yao ◽  
C. Y. Hsu
Keyword(s):  
Joule Heating ◽  
Hot Spots ◽  
Flip Chip ◽  
Solder Joints ◽  
Infrared Microscopy ◽  
Snag Solder

Finite element analysis of vertical micro-probe considering Joule-heating effect

2017 ◽  
Vol 101 ◽  
pp. 96-105 ◽  
Author(s):  
Hyun-Woo Jung ◽  
Seung-Jae Kim ◽  
Yun-Jae Kim ◽  
Jung-Yup Kim ◽  
Joo-Yul Lee ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Joule Heating ◽  
Heating Effect ◽  
Element Analysis ◽  
Joule Heating Effect

scholarly journals Flow control in microfluidics devices: electro-osmotic Couette flow with joule heating effect

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
C. Ahamed Saleel ◽  
Saad Ayed Alshahrani ◽  
Asif Afzal ◽  
Maughal Ahmed Ali Baig ◽  
Sarfaraz Kamangar ◽  
...  
Keyword(s):  
Flow Control ◽  
Couette Flow ◽  
Joule Heating ◽  
Dynamic Viscosity ◽  
Microfluidic Devices ◽  
Heating Effect ◽  
Content Type ◽  
Osmotic Flow ◽  
Joule Heating Effect ◽  
Electro Osmotic Flow

PurposeJoule heating effect is a pervasive phenomenon in electro-osmotic flow because of the applied electric field and fluid electrical resistivity across the microchannels. Its effect in electro-osmotic flow field is an important mechanism to control the flow inside the microchannels and it includes numerous applications.Design/methodology/approachThis research article details the numerical investigation on alterations in the profile of stream wise velocity of simple Couette-electroosmotic flow and pressure driven electro-osmotic Couette flow by the dynamic viscosity variations happened due to the Joule heating effect throughout the dielectric fluid usually observed in various microfluidic devices.FindingsThe advantages of the Joule heating effect are not only to control the velocity in microchannels but also to act as an active method to enhance the mixing efficiency. The results of numerical investigations reveal that the thermal field due to Joule heating effect causes considerable variation of dynamic viscosity across the microchannel to initiate a shear flow when EDL (Electrical Double Layer) thickness is increased and is being varied across the channel.Originality/valueThis research work suggest how joule heating can be used as en effective mechanism for flow control in microfluidic devices.

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