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Journal of Display Technology

Journal of Display Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 9, Iss. 5 — May. 1, 2013
  • pp: 371–376

A Stress Analysis of Transferred Thin-GaN Light-Emitting Diodes Fabricated by Au-Si Wafer Bonding

Bo-Wen Lin, Nian-Jheng Wu, Yew Chung Sermon Wu, and S. C. Hsu

Journal of Display Technology, Vol. 9, Issue 5, pp. 371-376 (2013)


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Abstract

Thin-GaN light-emitting diodes were fabricated by Au-Si wafer bonding and laser lift-off. The relaxation process of the thermal strain in the transferred GaN films on a Si substrate was studied by varying the bonding film thickness of the Au over a wide range from 7 µm to 40 µm. The transferred GaN films were found to be strained by the biaxial compressive stress. A 10 µm Au bonding layer thickness was proven to have the lowest residual compressive stress, and the complete compressive stress variation throughout the entire thin-GaN fabrication process is discussed. Finally, we changed the biaxial in-plane stress of the transferred GaN thin film by controlling the bonding conditions, including the bonding layer thickness and the bonding temperature.

© 2013 IEEE

Citation
Bo-Wen Lin, Nian-Jheng Wu, Yew Chung Sermon Wu, and S. C. Hsu, "A Stress Analysis of Transferred Thin-GaN Light-Emitting Diodes Fabricated by Au-Si Wafer Bonding," J. Display Technol. 9, 371-376 (2013)
http://www.opticsinfobase.org/jdt/abstract.cfm?URI=jdt-9-5-371


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