Electronics Assembly Knowledge, Vision & Wisdom
Soldering, Selective, Wave << Page 1 of 14 >>
These programs cover manual and automated soldering, selective soldering, wave soldering and more.

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Opens With Assembled QFN Components
Opens With Assembled QFN Components
We are experiencing opens on assembled QFN components at a rate of approximately 9%. The component has two rows of pads and the failure only appears in rows near the component center. Our boards are double-side reflow and this component is mounted on the first side.

Board Talk
Behavior of Materials in the Manufacturing Environment
Behavior of Materials in the Manufacturing Environment
This document shows the effect of Dk and Df values from 10GHz to 20GHz and also shows their performance for lead-free assembly.
Materials Tech
When is it Time to Shift from Hand to Wave Soldering?
When is it Time to Shift from Hand to Wave Soldering?
We assemble simple through-hole circuit boards. What are the main factors to consider when shifting from hand soldering to wave soldering?
Board Talk
Solder Joint Embrittlement Mechanisms, Solutions and Standards
Solder Joint Embrittlement Mechanisms, Solutions and Standards
The paper describes four case studies of solder joint embrittlement, three with Sn63Pb37 and one with SnAg3.7 solder alloy.
Materials Tech
Ask the Experts
Components Lifting During Wave Soldering
We have a problem with components rising while going through wave soldering. We prefer to avoid lead clinching. What do you suggest?
Ask the Experts
TOF SIMS Analysis for SnO Determination
TOF SIMS Analysis for SnO Determination
During the production of Lead-Free Hot Air Solder Leveling (LF HASL), non-wetting issues in several components were found including BGA pad.
Analysis Lab
Ask the Experts
Cold Solder Joints on 0603 Components
We see cold solder joints on 0603 components yet all larger components veood solder joints. Is the problem due to solder paste exceeding the 12 hour usage limit?
Ask the Experts
Position Accuracy Machines for Selective Soldering Fine Pitch
Position Accuracy Machines for Selective Soldering Fine Pitch
Selective soldering is a robust soldering process. This paper explores the different process steps and critical parameters.
Production Floor
Solder Column Attachment for Absorbing Large CTE Mismatch
Solder Column Attachment for Absorbing Large CTE Mismatch
Paper reviews commercially off-the-shelf solder columns available, including plain columns, copper wrapped columns and more.
Production Floor
Simple Test for Flux Penetration
Simple Test for Flux Penetration
What is a good test for flux penetration through plated hole barrels on plated through hole circuit boards? A simple method is offered.
Board Talk
Soldering, Selective, Wave << Page 1 of 14 >>
 
 
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