TY - GEN
T1 - Interlayer Engineering to Achieve <1 m2K/GW Thermal Boundary Resistances to Diamond for Effective Device Cooling
AU - Woo, K.
AU - Malakoutian, M.
AU - Jo, Y.
AU - Zheng, X.
AU - Pfeifer, T.
AU - Mandia, R.
AU - Hwang, T.
AU - Aller, H.
AU - Field, D.
AU - Kasperovich, A.
AU - Saraswat, D.
AU - Smith, D.
AU - Hopkins, P.
AU - Graham, S.
AU - Kuball, M.
AU - Cho, K.
AU - Chowdhury, S.
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Highly localized electric fields and resulting high-temperature spots can cause channel performance degradation in semiconductor devices, which eventually leads to premature failure due to thermal runaway. To address these challenges, well-designed thermal management at the device/chip level is crucial. Diamond due to its high thermal conductivity is an effective heat-spreader when integrated near the hot spot in the channel/junction. However, a significant bottleneck lies in the thermal boundary resistance (TBR) between the hot spot generated in the device and the heat spreader. Here, atomistic thermal transport modeling was first used to show the reduction of TBR below the diffuse-mismatch (DMM) theory predictions is possible with a thin SiC interlayer. Then, experimentally, the SiC interlayer crystallinity and thickness were engineered to produce TBRs of 3.1±0.7 and 1.89±0.18 m2K/GW. TBRs in this range, alone can lead to W-band power to > 30 W/mm in GaN HEMTs. Such low TBR would lead to greater reliability and performance for both GaN and Si technologies.
AB - Highly localized electric fields and resulting high-temperature spots can cause channel performance degradation in semiconductor devices, which eventually leads to premature failure due to thermal runaway. To address these challenges, well-designed thermal management at the device/chip level is crucial. Diamond due to its high thermal conductivity is an effective heat-spreader when integrated near the hot spot in the channel/junction. However, a significant bottleneck lies in the thermal boundary resistance (TBR) between the hot spot generated in the device and the heat spreader. Here, atomistic thermal transport modeling was first used to show the reduction of TBR below the diffuse-mismatch (DMM) theory predictions is possible with a thin SiC interlayer. Then, experimentally, the SiC interlayer crystallinity and thickness were engineered to produce TBRs of 3.1±0.7 and 1.89±0.18 m2K/GW. TBRs in this range, alone can lead to W-band power to > 30 W/mm in GaN HEMTs. Such low TBR would lead to greater reliability and performance for both GaN and Si technologies.
UR - http://www.scopus.com/inward/record.url?scp=85185605519&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85185605519&partnerID=8YFLogxK
U2 - 10.1109/IEDM45741.2023.10413734
DO - 10.1109/IEDM45741.2023.10413734
M3 - Conference contribution
AN - SCOPUS:85185605519
T3 - Technical Digest - International Electron Devices Meeting, IEDM
BT - 2023 International Electron Devices Meeting, IEDM 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 International Electron Devices Meeting, IEDM 2023
Y2 - 9 December 2023 through 13 December 2023
ER -