Electronics Assembly Knowledge, Vision & Wisdom
Nov 15, 2018
How Many Fiducials Per Stencil
How Many Fiducials Per Stencil
We have seen as many as 180 fiducials per stencil with a step and repeat. How many fiducials are recommended for a solder paste stencil? Phil Zarrow and Jim Hall, The Assembly Brothers, answer this question and share their own experiences.
Board Talk
ESD and Humidification
In the handling of circuit board assemblies is ambient air humidification necessary if other means of protection are enforced?
Ask the Experts
Using Vias to Improve PCB Density
Improving Quality with Automatic Solder Nozzle Tinning
Enabling IPX Level 7/8 PCB Waterproof Protection
Conformal Coatings that don't crack under pressure
Important Ways of Approaching Heat Management
PCB Prototyping for Smarties
Why Jobs Go On Hold
Case Studies Demonstrate Value-Added Services to Enable Client Success
Leadless Flip Chip PLGA for Networking Applications
Leadless Flip Chip PLGA for Networking Applications
Initially motivated by the demand for smaller, more efficient and feature rich mobile electronics, this trend has expanded across numerous applications.
Production Floor
Quantum Computing Becomes a Real Technology
Quantum Computing Becomes a Real Technology
Researchers are close to building quantum computers powerful enough to do those things that conventional computers cannot dubbed "quantum supremacy."
Technology Briefing
The Effect of Radiation Losses on High Frequency PCB Performance
This paper is an extension of an IPC paper presented in 2013 that addressed microwave insertion loss of common PCB transmission line circuits.
Analysis Lab
Reliability of Doped Lead-Free Solder Joints Under Isothermal Aging
Reliability of Doped Lead-Free Solder Joints Under Isothermal Aging
This paper presents harsh environment reliability test results for lead-free solder pastes with and without the presence of a variety of dopant elements.
Materials Tech
Vapor Phase Quality Improvement
Today's state of the art single-phase vapor phase provide the solutions needed for lead-free soldering and requirements for a void-less solder joint.
Production Floor
Ask the Experts
Ultrasonic Cleaning and Surfactants
I've heard that deionized water is a poor conductor of ultrasonic cavitations. Can we add a surfactant to improve the ultrasonic effectiveness?
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Evaluating Accuracy of Thermocouple Attach Methods
The goal of this study was to identify a non-destructive method for thermocouple attachment that provides a small offset to the "actual temperature under a BGA."
Analysis Lab
Max Interval Between Reflow for OSP Boards
Max Interval Between Reflow for OSP Boards
With OSP coated circuit boards, what is the maximum allowable time interval between reflow of the first and second sides to insure proper wetting.
Board Talk
DFX on High Density Assemblies
This paper discusses selection of the correct solder paste based on end product and the need to conduct proper root cause analyses before making any material changes.
Materials Tech
Wearable Cameras
Wearable Cameras
Wearable cameras promise to share videos instantaneously with the world. Engineers have developed HD video streaming that doesn't need to be plugged in.
Technology Briefing
Control of the Underfill of Surface Mount Assemblies
Paper addresses the control of surface mount under fill assemblies, focusing on inspection techniques and possible options to overcome their limitations.
Production Floor
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Requirement for Toe Fillets
The IPC gives a requirement for the End Joint Width of the Gull Wing but then offers an allowance for Toe Overhang and states there is no minimum requirement.
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The Mysterious Pink Snow
The Mysterious Pink Snow
One morning after a snowstorm, the morning shift at Allied Chemical was greeted in the parking lot by pink snow. What caused this strange event?
Mysteries of Science
Cartoon
"This problem requires immediate action. Hire another scapegoat!"
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