Martin Kuball - CS MANTECH Conference CS MANTECH Conference

GaN-on-diamond: the correlation between interfacial toughness and thermal resistance

Daniel Francis, Akash Systems, San Francisco, CA, USA

Daniel Field, University of Bristol

Caho Yuan, University of Bristol

Roland Simon, Thermap Solutions

Daniel Twitchen, Element Six Ltd.

Firooz Faili, Element Six Technologies, Santa Clara, CA

Dong Liu, University of Oxford, University of Bristol

Martin Kuball, University of Bristol

A nanoindentation induced blistering method has been used to extract the GaN/diamond interfacial toughness (adhesion energy) from four types of GaN-on-diamond samples with varying SiN_x interlayer thicknesses. The mode I energy release rate (G_IC) was quantified and is presented. Additionally, transient thermoreflectance has been used to measure the thermal boundary resistance (TBR) between the GaN and the diamond substrate. It was found that a thin SiN_x interlayer resulted in a lower TBR (15 m²K GW^-1) whilst maintaining a reasonable interfacial toughness (1.4±0.5 J m^-2). For interlayers of a similar thickness, samples with a high interfacial toughness and high residual stresses in the GaN had a smaller TBR. This indicates that the intrinsic interfacial characteristics that enhanced the interfacial toughness could be beneficial in improving the TBR.

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May 12, 2022 // 3:20pm

18.12 GaN-on-Si Membranes for Power Device Applications: Stress Evolution throughout Fabrication

Jerome Cuenca, Cardiff University, Cardiff, UK

Oliver Williams, Cardiff University, Cardiff, UK

Martin Kuball, University of Bristol

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May 11, 2022 // 5:30pm

12.4 Novel thermoreflectance-based method for in-situ die attach thermal conductivity assessment in packaged devices

Zeina Abdallah, University of Bristol

Nathawat Poopakdec, University of Bristol, Bristol, UK and Navaminda Kasatriyadhiraj Royal Air Force Academny

Martin Kuball, University of Bristol

James Pomeroy, University of Bristol

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May 12, 2022 // 11:30am

14.3 Dynamic Ron in AlGaN/GaN Structure with Different Layer Thickness

Hyun-Seop Kim, University of Bristol, Bristol, UK

Hassan Hirshy, IQE, Cardiff, UK

Andrew Withey, Nexperia Newport Wafer Fab, Newport, UK

Robert Harper, Compound Semiconductor Centre, Cardiff, UK

Sam Evans, Nexperia Newport Wafer Fab, Newport, UK

Martin Kuball, University of Bristol

Michael J Uren, University of Bristol

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12.1.2023 Thermal management in GaN-devices for increased power density

Mohamadali Malakoutian, Stanford University, Stanford, CA,

Xiang Zheng, University of Bristol, Bristol

Martin Kuball, University of Bristol

S. Chowdhury, Stanford University, Stanford, CA; University of Bristol, Bristol, UK

12.1.2023 Invited Talk_Srabanti Chowdhury_final

12.3.2023 Characterization of a Novel Thermal Interface Material based on Nanoparticles for High Power Device Package Assembly

Zeina Abdallah, University of Bristol

James Pomeroy, University of Bristol

Nicolas Blasakis, Adamant Composite Ltd.

Athanasios Baltopoulos, Adamant Composite Ltd.

Antonios Vavouliotis, Adamant Composite Ltd.

Martin Kuball, University of Bristol

12.3.2023 CS_MANTECH_2023_final_Zeina_Abdallah

15.2.2023 Selective Area Growth of B-Ga2O3

Arpit Nandi, University of Bristol

Indraneel Sanyal, University of Bristol

Martin Kuball, University of Bristol

15.2.2023_SAG of Ga2O3_Arpit Nandi_CDTR -W_Rev1

10.1.3.2024 3D Diamond Growth for GaN Cooling and TBR Reduction

Daniel Francis, Akash Systems, San Francisco, CA, USA

Sai Charan Vanjari, University of Bristol

Xiaoyang Ji, University of Bristol

Tatyana Feygelson, U. S. Naval Research Laboratory

Joseph Spencer, U.S. Naval Research Laboratory

Hannah N. Masten, National Research Council Postdoctoral Fellow, Residing at NRL

Alan Jacobs, U.S. Naval Research Laboratory

James Spencer Lundh, National Research Council Postdoctoral Fellow, Residing at NRL

Marko Tadjer, U.S. Naval Research Laboratory

Travis J. Anderson, U.S. Naval Research Laboratory

Karl D. Hobart, U.S. Naval Research Laboratory

Bradford Pate, Naval Research Laboratory

James Pomeroy, University of Bristol

Matthew Smith, University of Bristol

Martin Kuball, University of Bristol

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10.1.4.2024 Thermal Dissipation Enhancement Using a Metal-Diamond Composite Heat Spreaders in High-Power RF MMICs

Zeina Abdallah, University of Bristol

James Pomeroy, University of Bristol

Martin Kuball, University of Bristol

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11.2.2.2024 Mapping of Local Threshold Voltage in AlGaN/GaN HEMTs

Anjali Anjali, University of Bristol

James Pomeroy, University of Bristol

Jr-Tai Chen, SweGaN AB

Martin Kuball, University of Bristol

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11.2.3.2024 Time-Dependent Conduction Mechanisms in Superlattice Layers on 200 mm Engineered Substrates

Zequan Chen, University of Bristol

Peng Huang, University of Bristol

Indraneel Sanyal, University of Bristol

Matthew Smith, University of Bristol

Michael J Uren, University of Bristol

A. Vohra, imec, Leuven, Belgium

Benoit Bakeroot, imec, Leuven, Belgium and CMST, imec & Ghent University, Ghent, Belgium

Martin Kuball, University of Bristol

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