Flat SiC semiconductor substrate

M Loboda, C Parfeniuk - US Patent 9,018,639, 2015 - Google Patents
Methods for manufacturing silicon carbide wafers having superior specifications for bow,
warp, total thickness variation (TTV), local thickness variation (LTV), and site front side least …

Effect of defects in silicon carbide epitaxial layers on yield and reliability

H Das, S Sunkari, J Justice, H Pham… - Materials Science …, 2019 - Trans Tech Publ
Inline metrology tools are widely used to detect defects in SiC epitaxial layers. The defect
statistics are used in a variety of ways to determine quality, pass/fail and screen affected die …

SiC substrate with SiC epitaxial film

MJ Loboda, J Zhang - US Patent 8,940,614, 2015 - Google Patents
HOIL 2/76(2006.01) HOIL 2L/20(2006.01)(57) ABSTRACT HOIL 21/02(2006.01) A method
of forming an epitaxial SiC film on SiC substrates HOIL 2L/365(2006.01) in a warm wall CVD …

Method for manufacturing SiC wafer fit for integration with power device manufacturing technology

D Hansen, M Loboda, I Manning… - US Patent …, 2016 - Google Patents
A method for producing silicon carbide substrates fit for epitaxial growth in a standard
epitaxial chamber normally used for silicon wafers processing. Strict limitations are placed …

Method for growing a SiC crystal by vapor deposition onto a seed crystal provided on a supporting shelf which permits thermal expansion

M Loboda - US Patent 9,738,991, 2017 - Google Patents
(57) ABSTRACT A method of forming an SiC crystal, the method including: placing a Sic
seed in a growth vessel, heating the growth vessel, and evacuating the growth vessel …

Method for growing a SiC crystal by vapor deposition onto a seed crystal provided on a support shelf which permits thermal expansion

M Loboda, R Drachev, D Hansen… - US Patent 9,797,064, 2017 - Google Patents
A method of forming an SiC crystal including placing in an insulated graphite container a
seed crystal of SiC, and supporting the seed crystal on a shelf, wherein cushion rings …

Gate oxide reliability on trapezoid-shaped defects and obtuse triangular defects in 4H-SiC epitaxial wafers

O Ishiyama, K Yamada, H Sako… - Japanese Journal of …, 2014 - iopscience.iop.org
The reliability of the gate oxide on large-area surface defects (trapezoid-shaped and obtuse
triangular defects) in 4H-SiC epitaxial wafers is discussed. Time-dependent dielectric …

Characterization of Obtuse Triangular Defects on 4H-SiC 4° off-Axis Epitaxial Wafers

L Dong, GS Sun, J Yu, L Zheng, XF Liu… - Chinese Physics …, 2013 - iopscience.iop.org
We investigate the triangular defects with different structural features on 4H-SiC epilayers by
a Nomarski microscope, a Candela optical surface analyzer and ultraviolet …

High voltage power semiconductor devices on SiC

M Loboda, G Chung - US Patent 8,860,040, 2014 - Google Patents
Abstract 4H SiC epiwafers with thickness of 50-100 μm are grown on 4 off-axis substrates.
Surface morphological defect density in the range of 2-6 cm− 2 is obtained from inspection …

Flat SiC semiconductor substrate

M Loboda, C Parfeniuk - US Patent 9,165,779, 2015 - Google Patents
Methods for manufacturing silicon carbide wafers having superior specifications for bow,
warp, total thickness variation (TTV), local thickness variation (LTV), and site front side least …