Electronic assembly reliability

INTRODUCTION

• Reliability definitions
• Failure, failure mode and failure mechanism
• Abrupt (catalectic) and wear failure
• Example of failure mechanisms
• Resistance/stress theory

SOME MATHEMATICAL NOTIONS

• Failure rate function l(t)
• Evolution of failure rate over time (bathtub curve)
• MTBF, MTTF
• Use of statistical laws and their limitations :
  • Exponential
  • Weibull
• Sampling :
  • Ki²
  • Binomial

OUR APPROACH: “RELIABILITY THROUGH TECHNOLOGY

• Theoretical methods (MIL-HDBK-217, IEC 62380, FIDES)
• Use of REX
• Per test

OUR APPROACH: “RELIABILITY THROUGH TECHNOLOGY

• Definition of product life profile
• Risk analysis (technologies versus life profile)
  • Components and technologies : AEC-Q-XXX, PPAP, aeronautics, space…
  • Design
  • Industrialization
• Robustness testing
  • HALT
  • Development and implementation of a test plan
• Durability testing
  • Acceleration laws (Arrhenius, Coffin Manson and Norris Landzberg, HallbergPeck …)
  • Building a test plan and sequencing tests
• Manufacturing process qualification
  • Process control
  • Supplier audit

BURN-IN

• Definition of burn-in
• HASS, HASA, ESS
• POS and SOS
• Burn-in effectiveness

PRACTICAL EXERCISES ON A CASE STUDY

Throughout the training course, trainees are offered a number of exercises:

• Mathematical exercises (exponential, Weibull…)
• Life profile definition
• Technological risk analysis and industrialization
• Definition of a robustness plan
• Definition of a durability test plan (calculation of accelerated tests)

CLASSICAL RELIABILITY ASSESSMENT METHODS

• Theoretical calculations (MIL-HDBK-217, IEC 62380, FIDES)
• Test methods (D0 160, EN 50155, ESA…)
• Field feedback (REX)

QUESTIONS/ANSWERS

Level of experienced senior technician or engineer working on the quality or reliability of a product either in its manufacture or selection.

Technical or design office manager, engineer or project manager, reliability manager.

Engineer or project manager.

Projection and printed copies of Powerpoint presentations, practical case studies, exercises, situational examples, theoretical examples, video materials, etc.

Evaluation at the beginning and end of the course, quiz…

A training certificate complying with the provisions of Article L.6353-1 paragraph 2 is issued to the trainee.

5 working days before the start of the course (if OPCO funding).

2023 :

Satisfaction rate: 94%

Number of sessions: 3

Number of trainees: 9