Electronics Assembly Knowledge, Vision & Wisdom
Nov 13, 2018
PCBA Cleaning with Sodium Bicarbonate
PCBA Cleaning with Sodium Bicarbonate
Is there an effect on PCBA long-term reliability when cleaned with a sodium bicarbonate scrub followed by DI water rinse? The Assembly Brothers, Jim Hall and Phil Zarrow, answer this question.
Board Talk
Using Solder Paste Beyond the Expiration Date
We used a water soluble paste beyond the expiration date and are seeing a white powder residue. Is it because of the expiration date?
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
Rework of High I/O Column Grid Arrays
Rework of High I/O Column Grid Arrays
Off-the-shelf column grid arrays are now being considered for use in a number of NASA systems. This paper presents rework and re-column attachment data.
Production Floor
The Portable Smartphone Laboratory
The Portable Smartphone Laboratory
Researchers have developed a low-cost, portable laboratory on a smartphone that works nearly to detect viral and bacterial infections.
Technology Briefing
Embedded System Access
This paper discusses test access methodologies and elaborates on Embedded System Access strategies in particular.
Analysis Lab
Pressure-Less Silver Sintering Pastes for Low Porosity Joint and Large Die
Pressure-Less Silver Sintering Pastes for Low Porosity Joint and Large Die
Under pressure-less sintering conditions silver sintering pastes for different sized die attachment to form robust silver joints have been developed.
Materials Tech
New Approaches to Develop a Scalable 3D IC Assembly Method
In this paper, we will discuss various assembly options and the challenges posed by each.
Production Floor
Ask the Experts
Production Floor Temperature and Humidity Loggers
During a customer audit the environment measurements in our assembly area. Our one temperature logger was considered inadequate.
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Head in Pillow X-ray Inspection at Flextronics
For the study we used two boards exhibiting HIP defects with four types of AXI machines at four sites in Flextronics manufacturing, or vendor laboratory.
Analysis Lab
We Bake, But Still Have Delamination, Why?
We Bake, But Still Have Delamination, Why?
When our PCBs are wave soldered and then pass through reflow most had issues with delamination. Where should we look to solve this?
Board Talk
New Phosphorus-based Curing Agents for PWB
As a result of the continuous industrial trend towards high density packaging there is a growing demand for highly thermally-stable laminate materials.
Materials Tech
New Methods Extract Lithium from Water
New Methods Extract Lithium from Water
Researchers discovered a highly efficient way to extract lithium and other metals and minerals from water and published their findings in Science Advances.
Technology Briefing
Advanced Rework Technology for Large Area Arrays
Advanced Rework Technology for Large Area Arrays
This paper discusses rework challenges including identification of the key technical process, outlining efforts aimed at addressing these new challenges.
Production Floor
Ask the Experts
Tough Hand Soldering Problem
I work in an auto glass factory and we're having problems soldering the defrost cable wire to the windshield grid pattern. I think it has to do with factory temperature.
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Process Change Causes Spots
Process Change Causes Spots
After implementing line improvements, tiny bright spots appeared on the surface of newly made circuit boards. What was the cause?
Mysteries of Science
Cartoon
"I can't believe my boss is such an idiot. I thought he was brilliant when he hired me!"
Copyright © Randy Glasbergen