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Latchup

ISBN: 978-0-470-01642-8
Hardcover
472 pages
February 2008
List Price: US $183.00
Government Price: US $105.56
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Latchup (0470016426) cover image
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About the Author.

Preface.

Acknowledgements.

Chapter 1 CMOS Latchup.

1.1 CMOS Latchup.

1.2 Fundamental Concepts of Latchup Design Practice.

1.3 Building a CMOS Latchup Strategy.

1.4 CMOS Latchup Technology Migration Strategy.

1.5 Key Metrics of Latchup Design Practice.

1.6 CMOS Latchup Technology Trends and Scaling.

1.7 Key Developments.

1.8 Latchup Failure Mechanisms.

1.9 CMOS Latchup Events.

1.10 Electrostatic Discharge Sources.

1.11 Single Event Latchup.

1.12 Summary and Closing Comments.

Problems.

References.

Chapter 2 Bipolar Transistors.

2.1 The Bipolar Transistor and CMOS Latchup.

2.2 Bipolar Transistor.

2.3 Recombination Mechanisms.

2.4 Photon Currents in Metallurgical Junctions.

2.5 Avalanche Breakdown.

2.6 Vertical Bipolar Transistor Model.

2.7 Lateral Bipolar Transistor Models.

2.8 Lateral Bipolar Transistor Models with Electric Field Assist.

2.9 Lateral Bipolar Transistor Models–Nonuniform Vertical Profile.

2.10 Triple-Well Bipolar Transistor Models – Lateral and Vertical Contributions.

2.11 Merged Triple-Well Bipolar Models.

2.12 Summary and Closing Comments.

Problems.

References.

Chapter 3 Latchup Theory.

3.1 Regenerative Feedback.

3.1.1 Regenerative Feedback without Shunt Resistors and Alpha Representation.

3.2 Latchup Criterion with Emitter Resistance.

3.3 Holding Point Conditions.

3.4 Resistance Space.

3.5 Beta Space.

3.6 CMOS Latchup Differential Tetrode Condition.

3.7 CMOS Latchup Differential Holding Current Relationship.

3.8 CMOS Latchup Differential Holding Voltage Relationship.

3.9 CMOS Latchup Differential Resistance Relationship.

3.10 Differential Generalized Alpha Space Relationship.

3.11 High-Level Injection.

3.12 Transient Latchup.

3.13 External Latchup.

3.14 Alpha Particle Induced Latchup.

3.15 Summary and Closing Comments.

Problems.

References.

Chapter 4 Latchup Structures, Characterization and Test.

4.1 Guard Rings.

4.2 Latchup Characterization Structures – Single- and Dual-Well CMOS PNPN  Test Structures.

4.3 Latchup Characterization – Basic Triple-Well pnpn Latchup Test Structures.

4.4 Latchup Characterization Techniques – pnpn Structures with Deep Trench.

4.5 Latchup Characterization and Testing – Nonautomated Test Systems and Methodology.

4.6 Latchup Characterization and Testing – Automatic Test Systems.

4.7 Latchup Characterization – Wafer-Level Test Procedures.

4.8 Latchup Characterization Techniques – Wafer-level Transmission Line Pulse Methodology.

4.9 Latchup Characterization – Transient Latchup.

4.10 Guard Ring Characterization.

4.11 Latchup Failure Analysis Techniques.

4.12 Summary and Closing Comments.

Problems.

References.

Chapter 5 CMOS Latchup Process Features and Solutions – Dual-Well and Triple-Well CMOS.

5.1 CMOS Semiconductor Process Solutions and CMOS Latchup.

5.2 Substrates.

5.3 n-Wells.

5.4 p-Well.

5.5 pþ/nþ Scaling.

5.6 Isolation and Latchup.

5.7 Silicide.

5.8 Triple Well.

5.9 High-Dose Buried Layer.

5.10 Future Concepts.

5.11 Summary and Closing Comments.

Problems.

References.

Chapter 6 CMOS Latchup Process Features and Solutions – Bipolar and BiCMOS Technology.

6.1 CMOS Latchup in Bipolar and RF BiCMOS Technology.

6.2 Substrates – High-Resistance Substrates.

6.3 Subcollectors.

6.4 Alternative Isolation Concepts.

6.5 Trench Isolation (TI).

6.6 Deep Trench.

6.7 Triple-Well and BiCMOS Processes Integration.

6.8 Heavily Doped Buried Layer Implant and BiCMOS Technology.

6.9 Summary and Closing Comments.

Problems.

References.

Chapter 7 CMOS Latchup – Circuits.

7.1 Table of Circuit Interactions.

7.2 Intrabook Latchup Mechanisms.

7.3 Interbook Latchup Mechanisms.

7.4 Circuit Solutions – Input Circuit.

7.5 Power Supply Concepts.

7.6 Latchup Circuit Solutions – Power Supply to Power Supply Sequencing Circuitry.

7.7 Overshoot and Undershoot Clamp Networks.

7.8 Passive and Active Guard Rings.

7.9 Triple-Well Noise and Latchup Suppression Structures.

7.10 System-Level Issues.

7.11 Summary and Closing Comments.

Problems.

References.

Chapter 8 Latchup Computer Aided Design (CAD) Methods.

8.1 Latchup CAD Rules.

8.2 Design Rule Checking.

8.3 Computer-Aided Design Extraction Methodologies – Searching for the pnpn.

8.4 CAD Extraction Methods – Searching for the Guard Rings.

8.5 Latchup Extraction Methods and Tools.

8.6 Latchup CAD Simulation.

8.7 Summary and Closing Comments.

Problems.

References.

Index.

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