公开(公告)号：US11939695B2

公开(公告)日：2024-03-26

申请号：US17413929

申请日：2019-12-16

申请人： SUMCO CORPORATION

发明人： Ken Kitahara ,  Masanori Fukui ,  Hiroshi Kishi ,  Tomokazu Katano ,  Eriko Kitahara

IPC分类号： C30B15/10 ,  C03B20/00 ,  C03C19/00 ,  C30B29/06 ,  F27B14/10 ,  G01N21/3563 ,  G01N33/38 ,  C03B19/09

CPC分类号： C30B15/10 ,  C03B20/00 ,  C03C19/00 ,  C30B29/06 ,  F27B14/10 ,  G01N21/3563 ,  G01N33/386 ,  C03B19/095

摘要： A quartz glass crucible 1 having a cylindrical side wall portion 10a, a bottom portion 10b, and a corner portion 10c includes a transparent layer 11 as an innermost layer made of quartz glass, a semi-molten layer 13 as an outermost layer made of raw material silica powder solidified in a semi-molten state, and a bubble layer 12 made of quartz glass interposed therebetween. An infrared transmissivity of the corner portion 10c in a state where the semi-molten layer 13 is removed is 25 to 51%, the infrared transmissivity of the corner portion 10c in the state where the semi-molten layer 13 is removed is lower than an infrared transmissivity of the side wall portion 10a, and the infrared transmissivity of the side wall portion 10a in the state where the semi-molten layer 13 is removed is lower than an infrared transmissivity of the bottom portion 10b.

公开(公告)号：US11703452B2

公开(公告)日：2023-07-18

申请号：US17055314

申请日：2019-05-15

申请人： SUMCO CORPORATION

发明人： Yasunobu Shimizu ,  Keiichi Takanashi ,  Takeshi Fujita ,  Eriko Kitahara ,  Masanori Fukui

IPC分类号： G01N21/59 ,  C30B15/10 ,  C30B29/06 ,  C30B35/00 ,  G01B11/24 ,  G01N21/49

CPC分类号： G01N21/59 ,  C30B15/10 ,  C30B29/06 ,  C30B35/002 ,  G01B11/24 ,  G01N21/49

摘要： A measurement method and a measurement apparatus are capable of measuring the transmittance of a quartz crucible accurately. A measurement method includes: emitting a parallel light from a light source disposed on a side of one wall surface of a quartz crucible toward a predetermined measurement point of the quartz crucible; measuring reception levels of light transmitted through the quartz crucible at a plurality of positions by disposing a detector at the plurality of positions on a circle centered around an exit point of the parallel light on the other wall surface of the quartz crucible; and calculating a transmittance of the quartz crucible at the predetermined measurement point based on a plurality of the reception levels of the transmitted light measured at the plurality of positions.

公开(公告)号：US12091346B2

公开(公告)日：2024-09-17

申请号：US17294280

申请日：2020-01-10

申请人： SUMCO CORPORATION

发明人： Takeshi Fujita ,  Masanori Fukui

IPC分类号： C03B15/10 ,  C03B20/00 ,  C30B15/10 ,  C30B29/06

CPC分类号： C03B20/00 ,  C30B15/10 ,  C30B29/06

摘要： An apparatus for manufacturing a silica glass crucible includes a rotating means for rotating a mold and a supply means for feeding a silica powder inside the mold, wherein the supply means has a feeding part for delivering the silica powder in a manner releasing it to fall to a position away from the inner wall surface of the mold inside the mold, and a dispersing part for changing, to one toward the inner wall surface side, at a fall position, the direction in which the silica powder fed from the feeding part moves, while also widening an angle at which the silica powder disperses toward the inner wall surface at the fall position. The apparatus is intended to allow a silica powder layer to be stably formed in the mold in a short period of time.

公开(公告)号：US10822716B2

公开(公告)日：2020-11-03

申请号：US16308789

申请日：2017-08-17

申请人： SUMCO CORPORATION

发明人： Hiroshi Kishi ,  Masanori Fukui

IPC分类号： C30B15/10 ,  C03B19/09 ,  C03B20/00 ,  C30B29/06

摘要： In an exemplary embodiment, a quartz glass crucible 1 includes: a high-aluminum-content layer 14B which is made of quartz glass having a relatively high average aluminum concentration and is provided to form an outer surface 10b of the quartz glass crucible 1; and a low-aluminum-content layer 14A which is made of quartz glass having a lower average aluminum concentration than that of the high-aluminum-content layer 14B and is provided on an inner side of the high-aluminum-content layer 14B, wherein the low-aluminum-content layer 14A includes an opaque layer 11 made of quartz glass containing a large number of minute bubbles, and the high-aluminum-content layer 14B is made of transparent or translucent quartz glass having a lower bubble content than that of the opaque layer 11. The quartz glass crucible is capable of withstanding a single crystal pull-up step undertaken for a very long period of time.