[2025 short course] 5-2: GaN BTI/TDDB/Switching/CGD/CGS & SiC TDDB

Value of the Information & Strength of the Argument

The lecture provides valuable insights into the reliability physics of GaN and SiC devices, supported by experimental data and references to literature. The argumentation is solid, as the instructor explains mechanisms such as trapping, defect creation, and impact ionization, and correlates them with observed phenomena. The use of specific examples, like the gamma analysis and TDDB curves, strengthens the scientific rigor. However, the presentation is dense and assumes prior knowledge, which may limit accessibility for non-experts.

Scientific Rigor, Source Quality, Title Accuracy

The scientific rigor is high, with the instructor referencing multiple studies and presenting original data from his group. The sources are not explicitly listed in the description, but the content is based on established research in the field. The title accurately reflects the content, focusing on GaN and SiC reliability. The lecture is well-structured, though it is a segment of a larger course, so some context may be missing.

The title accurately reflects the content, which focuses on GaN and SiC reliability mechanisms including BTI, TDDB, and switching effects.

8/10

The content is presented by an academic expert in semiconductor reliability, based on established research and experimental data. The lecture covers advanced topics with specific examples and references to literature, demonstrating a high level of expertise. However, the video is a lecture segment without formal peer review or detailed citations in the description, limiting verifiability.

Markers derived by PSI from the transcript: the creator did not define chapters.

• 00:00Introduction to GaN reliability: BTI and TDDB
• 01:00Analysis of hysteresis and gamma parameter in GaN HEMTs
• 03:00Discussion on p-GaN gate HEMTs and magnesium concentration effects
• 05:00TDDB in GaN: soft and progressive breakdown
• 07:00Hard switching stress and dynamic on-resistance degradation
• 09:00Novel test topology for continuous switching reliability
• 11:00Miller effect and parasitic capacitance impact on switching
• 13:00SiC reliability: on-state and off-state stress mechanisms
• 15:00TDDB in SiC MOSFETs: experimental data and activation energy
• 17:00Lifetime extrapolation and comparison of device types

• Comprehensive analysis of gamma in GaN HEMTs — Referenced in the lecture when discussing the gamma parameter and defect distribution.
• TDDB effects in GaN HEMTs with different dielectric stacks — Referenced when discussing TDDB in GaN with different recess depths.
• Hard switching reliability testing from TSMC, Panasonic, TI, and Transphorm — Mentioned as companies reporting different testing vehicles for hard switching reliability.
• Novel topology for continuous switching reliability — Referenced as a recent paper reporting a novel topology for evaluating active and synchronized transistors.

• IEEE International Reliability Physics Symposium (IRPS) — A major conference where many of the cited studies on GaN and SiC reliability are presented.
• Journal of Applied Physics — Publishes research on semiconductor device physics and reliability.