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Dec 13, 2018

Is No-Clean the Trend for QFN Components?

Is there a move to no-clean for QFN components, or will certain technologies have to continue using a traditional cleaning process? The Assembly Brothers, Phil Zarrow and Jim Hall, answer this question.
Board Talk

Calculating PCB Hole Diameters
Our bare boards are typically .065" thick. How can we calculate the hole diameter for connector pins if the board thickness increases to .150"?
Ask the Experts

Technical Papers

■	Solving Problems Before They Occur in PCB Design to Manufacture
■	Using Vias to Improve PCB Density
■	Improving Quality with Automatic Solder Nozzle Tinning
■	Enabling IPX Level 7/8 PCB Waterproof Protection
■	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

Automating the Rework Process
This paper describes Automated Optical Rework technology and its advantages for advanced circuit board production.
Production Floor

3D Printed Food
Researchers have built a platform that uses 3D printing to create food microstructures that allow food texture and body absorption to be customized.
Technology Briefing

Voiding/Drop Test for Mixed Alloy BGA Assembly
BGAs with various alloy balls were assembled with various solder pastes. Joint strength, drop test performance and voiding performance were evaluated.
Analysis Lab

Improved Flux Reliability of Lead-Free Solder Alloy Solder Paste
This paper covers a type of 'crack free' flux paste designed to inhibit cracking under extreme environments. Includes electro-chemical migration tests dew .
Materials Tech

Miniaturization of Hearing Aid Electronics Using Embedded Die Packaging
This paper examines the use of second generation embedded die packaging to drive further size reduction in custom hearing instruments.
Production Floor

0201 Pick & Place Nozzle Plugging
Our stencil vendor is recommending the same aperture size going to a .004" think stencil. I am concerned about reducing the volume by 20%.
Ask the Experts

HALT Testing of Backward Soldered BGAs on a Military Product
This study evaluates reliability in a production design. Functional assemblies were built using Pb-free BGAs in a SnPb solder process and subjected to life testing.
Analysis Lab

Should We Measure Solder Paste Thickness?
On average, how many locations should we measure our PCBs to confirm our solder paste thickness? Our PCBs are approximately 10" by 10".
Board Talk

Lower Temperature Solder Joint Encapsulant
The strength of solder joints is enhanced by several times, and thermal cycling performance is significantly improved.
Materials Tech

Self-Driving Vehicles: From Prototypes to Commercial Success
From real estate and jobs to insurance and law enforcement, no digital application will have more far-reaching consequences than self-driving cars and trucks.
Technology Briefing

Latent Short Circuit Failure in High-rel PCBs
This paper describes inspections performed on base materials, manufacturing processes and final PCBs.
Production Floor

Conformal Coating Recommendation
We are developing an outdoor LED module. The product needs a 5 year service life. What type of conformal coating do you suggest?
Ask the Experts

Wasp Vs. Spider
A battle for the ages as a spider and wasp face-off. Let's get ready to bumbleeeee.
Mysteries of Science

Cartoon of the Day

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