SEM Lab, Inc. Document Collection

Papers

This page is a collection of documents and presentations that we have created based on failure mechanisms we have seen in the last 21 years. Please feel free to download the pdf files. Comments are appreciated (info@semlab.com).

Solder microstructure
Eutectic Pb-Sn microstructure with Au-Sn intermetallic compound on surface of a BGA solder bump.

Intermetallics in Solder Joints

Microstructural Evaluations


The intermetallic compounds that have been most important in our work performing microstructural evaluations on solder joints are described in this paper.

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LED microsection
LED microsection.

Failure Analysis of LEDs

Light Emitting Diodes (LEDs)


Paper describing various failure modes seen in Light Emitting Diodes (LEDs).

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BGA failure
Ball Grid Array (BGA) solder joint failure analysis.

Failure Analysis of BGAs

Ball Grid Arrays (BGAs)


This document describes several BGA failure modes and analysis approaches that can be performed with a limited number of analytical tools (e.g. DMM, microsectioning, and SEM/EDS).

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Gold embrittlement microstructure.
Gold embrittlement microstructure.

Gold Embrittlement of Solder Joints

Intermetallics


A detailed account of how material and process parameters can lead to gold embrittlement of solder joints in electronic assemblies.

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Corroded PMIC
Corroded PMIC

Failure Analysis of PCBAs

Printed Circuit Board Assemblies (PCBAs)


Failure mechanisms seen in PCBAs and how to avoid them.

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Nickel barrier layer on soldered MLCC termination
Nickel barrier layer on soldered MLCC termination

Diffusion Barrier Plating in Electronics

Printed Circuit Board Assemblies (PCBAs)


This paper is a series of examples illustrating the use of diffusion barriers in electronics manufacturing.

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Images of Failures in Microelectronics Packaging and Assembly
Images of Failures in Microelectronics Packaging and Assembly

Images of Failures in Microelectronic Packaging

IMAPS Presentation


A collection of images showing failures seen at SEM Lab, Inc.

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FTIR spectrum for Poly(oxymethylene) or POM or Delrin.
FTIR spectrum for Poly(oxymethylene) or POM or Delrin.

Fourier Transform Infrared Analysis

FTIR


A more in-depth look at FTIR analysis.

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Aluminum Electrolytic Capacitor
Aluminum Electrolytic Capacitor

Failure Analysis of Aluminum Electrolytic Capacitors

AEC


A guide to failure mechanisms and failure analysis techniques in aluminum electrolytic capacitors made available on Google Books.

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