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Larger Stencil Apertures and Type 4 Paste
Larger Stencil Apertures and Type 4 Paste
What is your experience with larger size apertures and type four solder paste for non-collapsible BGA and CGA type solder joints? The Asembly Brothers, Phil Zarrow and Jim Hall, discuss this question and share their advice and suggestions.
Board Talk

The Dynamics of Low Stress Epoxy Curing
The Dynamics of Low Stress Epoxy Curing
This study compares uniform variable frequency microwave (VFM) field cure to standard oven curing at temperatures below Tg (transition temperature).
Production Floor

System to Efficiently Produce Solar Thermochemical Hydrogen
System to Efficiently Produce Solar Thermochemical Hydrogen
In a study recently published, engineers lay out the conceptual design for a system that can efficiently produce “solar thermochemical hydrogen.”
Technology Briefing

Effect of EPIG Plating Thicknesses on Solder Joint and Wire Bond Reliability
Effect of EPIG Plating Thicknesses on Solder Joint and Wire Bond Reliability
This study focuses on determining the effects of palladium and gold thicknesses to ensure dependable solder joints and wire bonds.
Analysis Lab

Cu Conductive Paste as Via Filling Materials for Various Substrates
Cu Conductive Paste as Via Filling Materials for Various Substrates
In this study, we developed a Cu paste that can be used as a filling material for through silicon via (TSV), through glass via (TGV), and organic substrates.
Materials Tech

Cohesive Zone Modeling of Failure Underfilled BGA-PCB Assemblies
Cohesive Zone Modeling of Failure Underfilled BGA-PCB Assemblies
A model was developed to simulate the delamination behavior of multilayer PCBs assembled with BGA components reinforced with an underfill epoxy adhesive.
Production Floor

Lessons Learned While Investigating Microvia Reliability Failures
Lessons Learned While Investigating Microvia Reliability Failures
There has been an increasing number of reports concluding that stacked micro vias are failing preferentially when compared to an alternative staggered via design.
Analysis Lab

What is the IPC Definition for Uncommonly Harsh?
What is the IPC Definition for Uncommonly Harsh?
IPC 610 defines class three to include products where the end use environment may be uncommonly harsh. How is uncommonly harsh defined?
Board Talk

Insulation Resistance of Dielectric Materials
Insulation Resistance of Dielectric Materials
This investigation measures the leakage within internal PCB layers during exposure of various specimens to a controlled ground-based test environment.
Materials Tech

Implementing 3D Integration with 2D Materials
Implementing 3D Integration with 2D Materials
In a new study, researchers identify a potentially game-changing remedy: seamlessly implementing 3D integration with 2D materials.
Technology Briefing