Soldering, Selective, Wave
These programs cover manual and automated soldering, selective soldering, wave soldering and more.
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The Versatile Preform
The Versatile Preform
This paper discusses attributes within the solder families that the preforms are composed of and considerations when considering solder preforms.
Production Floor

Solderability Testing Protocols and Component Re-Tinning Methods
Solderability Testing Protocols and Component Re-Tinning Methods
This paper addresses methods to enhance solderability including: component solderability test methodologies, gold embrittlement and removal of gold plating.
Analysis Lab

Why is Solder Dross Sticking to Our PCBAs?
Why is Solder Dross Sticking to Our PCBAs?
After wave soldering we find dross particles on the circuit board surface. We cleaned and have the same problem. Do we have contamination?
Board Talk

Will Nitrogen Reduce Wave Solder Defects?
Will Nitrogen Reduce Wave Solder Defects?
We plan to install a nitrogen environment around the wave soldering tank. Is this likely to improve our defective parts-per-million level?
Board Talk

QFN I/O Pad Solder Paste Overprint on Thermal Pad Void Reduction
QFN I/O Pad Solder Paste Overprint on Thermal Pad Void Reduction
QFN SMT components continue to be increasingly used and also becoming smaller for applications further requiring a high level of thermal performance and reliability.
Production Floor

Copper-Tin Intermetallics: Their Importance, Growth Rate and Nature
Copper-Tin Intermetallics: Their Importance, Growth Rate and Nature
This paper will review the formation of copper-tin intermetallics, their growth rate, their effect on thermal cycle life, and drop shock performance.
Analysis Lab

Crack Propagation Mechanism Study on Bismuth Contained Base Lead Free Solder
Crack Propagation Mechanism Study on Bismuth Contained Base Lead Free Solder
The thermal cycling reliability characteristics of solder containing a small amount of Bismuth which is below 4wt% in accordance with the new requirements were investigated.
Analysis Lab

Soldering Relays Intrusively in Lead Free Process
Soldering Relays Intrusively in Lead Free Process
We use intrusive reflow soldering on relays using a lead process. We are challenged to solder relays intrusively in a lead-free process. Jim Hall and Phil Zarrow, The Assembly Brothers, share their own suggestions and recommendations.
Board Talk

Maximum Board Temperature During Tin-Lead
Maximum Board Temperature During Tin-Lead
IPC discusses the maximum top-side board temperature for BGAs to be 150 degrees C during a tin-lead wave solder. How is this temperature was determined? The Assembly Brothers, Phil Zarrow and Jim Hall, discuss this scenario.
Board Talk

Finding the Cause of Cold Solder Joints
Finding the Cause of Cold Solder Joints
We have problems with our wave soldering system, especially cold solder joints. Could this be caused by using a selective soldering frame?
Board Talk