Impacts of Mode Mixity on Controlled Spalling of (100)-Oriented Germanium
Abstract
Controlled spalling is a technology to prepare single-crystal thin films of semiconductors by fracture with a subsurface crack propagating nearly parallel to the substrate surface. Practical applications require uniform thickness and a smooth surface across the whole film. Both wafer-scale and patterned-stressor-defined small-area spalling of germanium substrates are conducted experimentally and numerically. River line features are observed on spalled surfaces close to lateral edges of the spall, regardless of the spall direction and the size of the spalled area. Three-dimensional finite element method modeling shows the river lines are caused by mixed mode I?+?III loading near the lateral edges of spall and predicts a spall depth variation near the lateral edges of spall due to mixed mode I?+?II loading. The absolute range of river lines increases with lateral size of spall, while the relative range of river lines decreases, consistent with variations in mode mixity.
- Authors:
-
- Colorado School of Mines, Golden, CO (United States)
- Colorado School of Mines, Golden, CO (United States); National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Publication Date:
- Research Org.:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Org.:
- U.S. Department of Defense (DOD), Air Force Research Laboratory; USDOE
- OSTI Identifier:
- 1781624
- Report Number(s):
- NREL/JA-5900-78868
Journal ID: ISSN 1047-4838; MainId:32785;UUID:e855b7e4-75e2-4d6f-b0d5-9965b661875f;MainAdminID:22351
- Grant/Contract Number:
- AC36-08GO28308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- JOM. Journal of the Minerals, Metals & Materials Society
- Additional Journal Information:
- Journal Volume: 73; Journal Issue: 6; Journal ID: ISSN 1047-4838
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; controlled spalling; crack propagation; river lines; twist hackles; mode III loading; Ge wafers; germanium wafers; photovoltaic; PV
Citation Formats
Chen, Jie, Chenenko, Jason, and Packard, Corinne E. Impacts of Mode Mixity on Controlled Spalling of (100)-Oriented Germanium. United States: N. p., 2021.
Web. doi:10.1007/s11837-021-04639-5.
Chen, Jie, Chenenko, Jason, & Packard, Corinne E. Impacts of Mode Mixity on Controlled Spalling of (100)-Oriented Germanium. United States. https://doi.org/10.1007/s11837-021-04639-5
Chen, Jie, Chenenko, Jason, and Packard, Corinne E. Thu .
"Impacts of Mode Mixity on Controlled Spalling of (100)-Oriented Germanium". United States. https://doi.org/10.1007/s11837-021-04639-5. https://www.osti.gov/servlets/purl/1781624.
@article{osti_1781624,
title = {Impacts of Mode Mixity on Controlled Spalling of (100)-Oriented Germanium},
author = {Chen, Jie and Chenenko, Jason and Packard, Corinne E.},
abstractNote = {Controlled spalling is a technology to prepare single-crystal thin films of semiconductors by fracture with a subsurface crack propagating nearly parallel to the substrate surface. Practical applications require uniform thickness and a smooth surface across the whole film. Both wafer-scale and patterned-stressor-defined small-area spalling of germanium substrates are conducted experimentally and numerically. River line features are observed on spalled surfaces close to lateral edges of the spall, regardless of the spall direction and the size of the spalled area. Three-dimensional finite element method modeling shows the river lines are caused by mixed mode I?+?III loading near the lateral edges of spall and predicts a spall depth variation near the lateral edges of spall due to mixed mode I?+?II loading. The absolute range of river lines increases with lateral size of spall, while the relative range of river lines decreases, consistent with variations in mode mixity.},
doi = {10.1007/s11837-021-04639-5},
journal = {JOM. Journal of the Minerals, Metals & Materials Society},
number = 6,
volume = 73,
place = {United States},
year = {Thu Apr 08 00:00:00 EDT 2021},
month = {Thu Apr 08 00:00:00 EDT 2021}
}
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