Environment and Operational Assessment of Products

Accelerated Screens and Test Research Program

Objective:

Develop and demonstrate Physics of Failure methodologies for accelerated product qualification and quality assurance. Methodologies transferred by guidelines and case studies available through on-line handbook, textbooks, workshops, and professional courses.

Projects: (Links are for Members only)

• C03-05 Risk Assessment & Accelerated Qualification of Lead Free Electronics
• C02-08 Accelerated Thermal Cycling Tests for Lead-Free Assemblies
• C02-14 Test Tailoring Methodology for Impact Loading Continuation
• C01-28 Drop Testing of Portable Consumer Electronic Devices
• C01-29 Test Tailoring Methodology for Impact Loading
• C01-31 Optimization of Stress Profiles for Accelerated Testing
• C01-38 Durability of Surface Mount Assemblies under Flexural Loads
• C00-52 Optimization of Stress Profiles for Accelerated Testing
• C00-25 Software and Guidelines for Accelerated Qualification and Quality Assurance of Electronic Assemblies
• C99-21 PoF Strategies for Quality Assurance
• C99-22 PoF Strategies for Accelerated Qualification
• C99-23 Web-based PoF Guidelines for Accelerated Testing and Screening of Electronic Assemblies
• C98-40 Strategies for Screening Electronic Assemblies
• C98-41 Acceleration Transforms for Combined Stresses
• C98-42 Accelerated Testing of Electronic Boxes
• C98-39 Web-based Guidelines for Accelerated Test
• C97-27 Temperature-Humidity Effects Using Mechanical Accelerators
• C97-13 PoF Approach to Accelerated Testing of Assemblies
• C96-29 Combined Temperature and Humidity Accelerated Testing of Assemblies
• C96-13 PoF Approach to Accelerated Testing of Assemblies
• C95-13 Accelerated Test Development for Combined Stresses
• C94-15b Fatigue Properties of Solder (Solder Joint Thermal Fatigue Life)
• C93-06 Use of Stress Margin Approach to Study Failures in PWB's

Reports: (Links are for Members only)

• IDSA (1998)
• Damage due to High Frequency Vibration (1998)
• Micro-Structural Damage Model: Vibration (1998)
• Enhanced IDSA: Temperature Dependency (1998)
• Enhanced IDSA: Micro-Structural Dependency (1998)
• PoF Example of Acceleration Factor Assessment (1998)
• Wavelets for Non-Stationary Excitation (1998)
• Stress Localization Techniques for Cyclic Thermal Testing: RRHE Technology (1998)
• Stress Localization Techniques for Vibration Testing: PZT Technology (1998)
• Evaluation of Temperature-Humidity Interactions using Mechanical Accelerators (1997)
• Algorithm: Energy Partitioning (1997)
• Nonlinear Incremental Damage Superposition Approach (IDSA) for Interconnect Reliability under Combined Stresses (1997)
• Cycle Counting Algorithm (1997)
• Vibration Mapping Algorithm: Wavelet (1997)
• Application of Wavelets for Cost-effective Vibration Response Analysis (1997)
• ALT Development for Combined Stresses (1996)
• SMT Durability Under Temperature & Vibration: 1st Report, 2nd Report (1996)
• RS v.s. ED Comparison for Accelerated Stress Application: 1st Report, 2nd Report (1996)
• Solder Joint Crack Initiation and Crack Propagation in a TSOP using Strain Energy Partitioning (1993)
• Stress Analysis of Glass-to-Metal Lead Seals (1993)

Case Studies: (Links are for Members only)

• Interconnect Defects
• PCMCIA Memory: Vibration Thermal
• Automotive Electronic Module
• Screening: Corrosion Defects in CCAs.
• QFP Durability
• PLCC Durability
• RS v.s. ED Comparison for ALT Stress Application (1997)
• SMT Durability under Stress and Vibration (1997)
• Automotive Car Stereo
• Thermal Fatigue of LCCC Solder Joints
• RS v.s. ED Comparison for ALT Stress Application (1995)
• SMT Durability under Temperature and Vibration (1995)

Softwares: (Links are for Members only)

• Online Cycle Counting Tool
• calcePWA Release 2.1

Web-Based Guidelines: (Links are for Members only)

• Review of Existing Standards and Literature
• Failure Distribution Analysis
• Defects Database
• Web based Guidelines for Screening

Education Program: (Links are for Members only)

    Graduate Course:

• Interconnect Reliability
• SMT Manufacturing

   Workshop:

• PWB Software Workshop
• PWA Software Workshop

Point of Contact:

• Dr. A. Dasgupta

Copyright © 2003 by CALCE and the University of Maryland, All Rights Reserved