Micro-Scale Solder Joints between Cu-Cu Wires Formed by Nanoparticle Enabled Lead-Free Solder Pastes

2016 ◽  
Author(s):  
Evan Wernicki ◽  
Edward Fratto ◽  
Yang Shu ◽  
Fan Gao ◽  
Zhiyong Gu
Keyword(s):  
Solder Joints ◽  
Lead Free ◽  
Lead Free Solder ◽  
Micro Scale ◽  
Solder Pastes ◽  
Free Solder

Failure Analysis of Lead-Free Solder Joints of an 1657CCGA (Ceramic Column Grid Array) Package

2007 ◽  
Vol 4 (3) ◽  
pp. 112-120 ◽  
Author(s):  
John Lau ◽  
Todd Castello ◽  
Dongkai Shangguan ◽  
Walter Dauksher ◽  
Joe Smetana ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Surface Finish ◽  
Failure Modes ◽  
Solder Joints ◽  
Temperature Cycling ◽  
Lead Free ◽  
Lead Free Solder ◽  
Organic Solderability Preservative ◽  
Solder Pastes ◽  
Free Solder

In this study, failure analysis of the 1657CCGA package with 95.5wt%Sn3.9wt%Ag0.6wt%Cu and 63wt%Sn37wt%Pb solder pastes on lead-free PCBs with the Entek OSP (organic solderability preservative) surface finish is investigated. Emphasis is placed on determining the failure locations and failure modes of the solder joints of the 1657CCGA assemblies after they have been through 7,000 cycles of temperature cycling.

Void Formation and Their Effect on Reliability of Lead-Free Solder Joints on MID and PCB Substrates

2017 ◽  
Vol 66 (4) ◽  
pp. 1229-1237 ◽  
Author(s):  
P. Wild ◽  
T. Grozinger ◽  
D. Lorenz ◽  
A. Zimmermann
Keyword(s):  
Solder Joints ◽  
Void Formation ◽  
Lead Free ◽  
Lead Free Solder ◽  
Free Solder

Quantitative Evaluation of Voids in Lead Free Solder Joints

2015 ◽  
Vol 772 ◽  
pp. 284-289 ◽  
Author(s):  
Sabuj Mallik ◽  
Jude Njoku ◽  
Gabriel Takyi
Keyword(s):  
Solder Bump ◽  
Solder Joints ◽  
Void Formation ◽  
Lead Free ◽  
Lead Free Solder ◽  
Solder Paste ◽  
X Ray ◽  
Size And Shape ◽  
Solder Bumps ◽  
Free Solder

Voiding in solder joints poses a serious reliability concern for electronic products. The aim of this research was to quantify the void formation in lead-free solder joints through X-ray inspections. Experiments were designed to investigate how void formation is affected by solder bump size and shape, differences in reflow time and temperature, and differences in solder paste formulation. Four different lead-free solder paste samples were used to produce solder bumps on a number of test boards, using surface mount reflow soldering process. Using an advanced X-ray inspection system void percentages were measured for three different size and shape solder bumps. Results indicate that the voiding in solder joint is strongly influenced by solder bump size and shape, with voids found to have increased when bump size decreased. A longer soaking period during reflow stage has negatively affectedsolder voids. Voiding was also accelerated with smaller solder particles in solder paste.

Retarding Electromigration in Lead-Free Solder Joints by Alloying and Composite Approaches

2012 ◽  
Vol 42 (2) ◽  
pp. 280-287 ◽  
Author(s):  
Ran Zhao ◽  
Limin Ma ◽  
Yong Zuo ◽  
Sihan Liu ◽  
Fu Guo
Keyword(s):  
Solder Joints ◽  
Lead Free ◽  
Lead Free Solder ◽  
Free Solder
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