Research
Innovative Panel Plating for Heterogeneous Integration
A Method to Investigate PCB Supplier Rework Processes and Best Practices
The Effects of PCB Fabrication on High-Frequency Electrical Performance
Aerosol Jet Printing of Conductive Epoxy for 3D
EOS Exposure of Components in the Soldering Process
High Thermo-Mechanical Fatigue and Drop Shock Resistant Alloys
Filling of Microvias and Through Holes by Electrolytic Copper Plating
NASA DOD Phase 2: Copper Dissolution Testing
MORE RESEARCH
Latest Industry News
How Telecom is Rolling Out 5G During a Pandemic
Can Software Performance Engineering Save Us From the End of Moore's Law?
Tech stocks have been a winning bet, but investors worry it will fade
All This Chaos Might Be Giving You 'Crisis Fatigue'
Notebook PCB makers to see tight capacity through 3Q20
How Effective Is Nano Coating On Stencils?
U.S. Critical Infrastructure Full of Security Holes
Auto Interior Is the New Exterior
MORE INDUSTRY NEWS

Multilayer Ceramic Capacitors: Mitigating Rising Failure Rates



Multilayer Ceramic Capacitors: Mitigating Rising Failure Rates
The multilayer ceramic capacitor (MLCC) has become a widely used electronics component both for surface mount and embedded PCB applications.
Materials Tech

DOWNLOAD

Authored By:


Dock Brown
DfR Solutions

Summary


The multilayer ceramic capacitor (MLCC) has become a widely used electronics component both for surface mount and embedded PCB applications. The MLCC technologies have gone through a number of material and process changes such as the shift from precious metal electrode (PME) configurations which were predominantly silver/palladium to base metal electrodes (BME) dominated by nickel.

Each of these changes were accompanied by both quality and reliability problems. The MLCC industry is now in the midst of an unprecedented set of challenges similar to the Moore's Law challenges being faced by the semiconductor industry. While capacitor failures have historically been responsible for a significant percentage of product field failures (most estimates are ~30%) we are seeing disturbing developments in the low voltage (<250V) commodity part infant mortality and wearout failure rates.

Conclusions


Field failures have been confirmed for MLCC applications where DC leakage fell substantially below the manufacturer's datasheet specification in 14 months, far below the 5 to 8 years projected in [11]. One conclusion in that 2010 CARTS paper was, "given the complexity of today's electronic devices and the reduced reliability margins of high CV capacitors, designers must pay special attention to reliability requirements of their system and the long term reliability of the capacitors" To mitigate rising MLCC failure rates, that was advice worth heeding in 2010 and remains valid today.

Initially Published in the IPC Proceedings

Comments

No mention in the report about the improper rework of the ceramic chip caps causing or contributing to the failure rate increase. Replacing them with a soldering iron or soldering tweezers crack them internally and shorten their life. IPC had a video about 30 minutes long discussing how to rework/replace them after initial assembly.
Bruce J Sander, EAE Sales

Submit A Comment


Comments are reviewed prior to posting. You must include your full name to have your comments posted. We will not post your email address.

Your Name


Your Company
Your E-mail


Your Country
Your Comments



Board Talk
How Effective Is Nano Coating On Stencils?
What Causes Board Delamination?
01005 Component Challenges and Bugs
Sticky Residue Under Low Clearance Parts
Soldering Relays Intrusively in Lead Free Process
Printing vs. Dispensing
Maximum Board Temperature During Tin-Lead
Is There a Spacing Spec for SMD Components?
MORE BOARD TALK
Ask the Experts
Recommended Fiducial Shape
HASL vs. Immersion Gold
Very Low Temp PCBs
Looking for Long-term Component Storage Options
Baking After Cleaning Hand Placed Parts
Conformal Coating Recommendation
Burned Chip Repair
BGA Component Grounding Problem
MORE ASK THE EXPERTS