Patents by Inventor Akifumi Sangu
Akifumi Sangu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230191533Abstract: A laser processing apparatus includes a laser source; a width adjuster that adjusts a width of a laser beam irradiated from the laser source; and a scanner that adjusts an irradiation direction of the laser beam having passed through the width adjuster, wherein the width adjuster includes a first width adjusting portion and a second width adjusting portion arranged on a traveling direction of the laser beam, a focal length of the first width adjusting portion is equal to or greater that about 20,000 mm and a focal length of the second width adjusting portion is equal to or greater than about 20,000 mm.Type: ApplicationFiled: August 16, 2022Publication date: June 22, 2023Applicant: Samsung Display Co., LTD.Inventors: Akifumi SANGU, Hyoung Joo KIM, Jung Hwa YOU, Il Young JEONG
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Publication number: 20230135789Abstract: A laser annealing apparatus includes a plurality of lasers, a laser controller that controls the plurality of lasers such that a plurality of laser beams generated from the plurality of lasers is emitted at different timings, beam mixer optics that outputs a processing beam by mixing the plurality of laser beams of which output timings are adjusted, and focus optics that outputs the processing beam of which focus is adjusted. The processing beam includes a first processing laser beam having a first pulse, a second processing laser beam having a second pulse following the first pulse, and a third processing laser beam having a third pulse following the second pulse. A first peak of the first pulse is smaller than a second peak of the second pulse, and a third peak of the third pulse is smaller than the second peak.Type: ApplicationFiled: July 25, 2022Publication date: May 4, 2023Inventors: JIN HONG JEUN, AKIFUMI SANGU, JEKIL RYU, CHEOLHO PARK, JEONGHUN WOO, HAESOOK LEE, YOUNGSU CHAE
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Patent number: 11532476Abstract: A laser crystallizing apparatus includes a first light source unit configured to emit a first input light having a linearly polarized laser beam shape. A second light source unit is configured to emit a second input light having a linearly polarized laser beam shape. A polarization optical system is configured to rotate the first input light and/or the second input light at a predetermined rotation angle. An optical system is configured to convert the first input light and the second input light, which pass through the polarization optical system, into an output light. A target substrate is seated on a stage and output light is directed onto the target substrate. A monitoring unit is configured to receive the first input light or the second input light from the polarization optical system and measure a laser beam quality thereof.Type: GrantFiled: April 20, 2021Date of Patent: December 20, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Akifumi Sangu, Gyoowan Han, Jekil Ryu, Kyungjae Lee
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Publication number: 20220212291Abstract: A laser crystallization apparatus according to an embodiment includes a light source unit irradiating a laser beam; and an optical unit to which the laser beam is incident, wherein the optical unit includes a first portion and a second portion bonded to each other on a bonded surface, and a first width of the first portion and a second width of the second portion are the same as each other on the bonded surface based on a direction parallel to the incident direction of the laser beam.Type: ApplicationFiled: October 18, 2021Publication date: July 7, 2022Inventors: Akifumi Sangu, Je Kil Ryu, Cheol Ho Park, Hae Sook Lee, Jin Hong Jeun, Young Su Chae, Gyoo Wan Han
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Publication number: 20220214531Abstract: A laser crystallization apparatus according to an embodiment includes: a light source unit which irradiates a laser beam; and a path conversion unit which converts the laser beam incident from the light source unit into a linear beam having a long axis parallel to a first direction and a short axis parallel to a second direction. The linear beam propagates in a third direction perpendicular to the first direction and the second direction, the path conversion unit includes an incident window extending parallel to a first length direction, an emission window extending parallel to a second direction, a first reflection unit disposed at the same side with the incident window, and a second reflection unit disposed at the same side with the emission window, and the second length direction extends parallel to the first direction in a view of the third direction.Type: ApplicationFiled: October 25, 2021Publication date: July 7, 2022Inventors: Akifumi SANGU, Je Kil RYU, Cheol Ho PARK, Hae Sook LEE, Jin Hong JEUN, Young Su CHAE, Gyoo Wan HAN
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Patent number: 11253952Abstract: A laser processing apparatus includes a light source configured to generate a laser beam, and a light converging optical system configured to converge laser beam to a focal point at an object to be processed, the light converging optical system including a through-hole optical element and a composite optical element under the through-hole optical element, wherein the through-hole optical element includes a first recess portion configured as a concave mirror at a lower surface of the through-hole optical element, and wherein an upper surface of the composite optical element is convex and includes a first region configured to reflect the laser beam and a second region configured to transmit the laser beam.Type: GrantFiled: May 9, 2019Date of Patent: February 22, 2022Assignee: Samsung Display Co., Ltd.Inventors: Akifumi Sangu, Alexander Voronov, Hyoung-Joo Kim, Eun Sun Choi, Emil Aslanov, Gyoo Wan Han
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Publication number: 20210333564Abstract: The present disclosure relates to an apparatus for forming a line beam. The apparatus includes a laser source, a telescope unit, a beam-transforming unit, a Fourier unit, a long-axis optical unit, and a short-axis optical unit. The laser source is configured to generate input light. The telescope unit is configured to magnify the input light in an X-axis direction perpendicular to an optical axis, which is a progression direction of the input light. The beam-transforming unit is configured to divide light incident from the telescope unit into a plurality of sub-columns. The Fourier unit is configured to uniformly mix the plurality of sub-columns. The long-axis optical unit is configured to uniformly disperse light mixed by the Fourier unit in the X-axis direction.Type: ApplicationFiled: November 9, 2020Publication date: October 28, 2021Inventors: AKIFUMI SANGU, JEKIL RYU, CHEOLHO PARK, HAESOOK LEE, YOUNGSU CHAE, GYOOWAN HAN
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Publication number: 20210257215Abstract: A laser crystallizing apparatus includes a first light source unit configured to emit a first input light having a linearly polarized laser beam shape. A second light source unit is configured to emit a second input light having a linearly polarized laser beam shape. A polarization optical system is configured to rotate the first input light and/or the second input light at a predetermined rotation angle. An optical system is configured to convert the first input light and the second input light, which pass through the polarization optical system, into an output light. A target substrate is seated on a stage and output light is directed onto the target substrate. A monitoring unit is configured to receive the first input light or the second input light from the polarization optical system and measure a laser beam quality thereof.Type: ApplicationFiled: April 20, 2021Publication date: August 19, 2021Inventors: AKIFUMI SANGU, GYOOWAN HAN, JEKIL RYU, KYUNGJAE LEE
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Patent number: 10991580Abstract: A laser crystallizing apparatus includes a first light source unit configured to emit a first input light having a linearly polarized laser beam shape. A second light source unit is configured to emit a second input light having a linearly polarized laser beam shape. A polarization optical system is configured to rotate the first input light and/or the second input light at a predetermined rotation angle. An optical system is configured to convert the first input light and the second input light, which pass through the polarization optical system, into an output light. A target substrate is seated on a stage and output light is directed onto the target substrate. A monitoring unit is configured to receive the first input light or the second input light from the polarization optical system and measure a laser beam quality thereof.Type: GrantFiled: November 29, 2018Date of Patent: April 27, 2021Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Akifumi Sangu, Gyoowan Han, Jekil Ryu, Kyungjae Lee
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Publication number: 20200180069Abstract: A laser processing apparatus according to an exemplary embodiment includes: a light source generating a laser beam; and a light converging unit converging the laser beam to a focal point on an object to be processed, wherein the light converging unit includes a first optical element including a through hole penetrating the first optical element; a second optical element including a first region reflecting the laser beam and a second region transmitting the laser beam; and a third optical element including a focusing lens as a convex lens, a lower surface of the first optical element is a concave mirror, and an upper surface of the second optical element is convex and a lower surface thereof is concave.Type: ApplicationFiled: October 18, 2019Publication date: June 11, 2020Inventors: Akifumi Sangu, Hyoung-Joo Kim, Alexander Voronov, Eun Sun Choi, Gyoo Wan Han
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Publication number: 20200101560Abstract: A laser processing apparatus includes a light source configured to generate a laser beam, and a light converging optical system configured to converge laser beam to a focal point at an object to be processed, the light converging optical system including a through-hole optical element and a composite optical element under the through-hole optical element, wherein the through-hole optical element includes a first recess portion configured as a concave mirror at a lower surface of the through-hole optical element, and wherein an upper surface of the composite optical element is convex and includes a first region configured to reflect the laser beam and a second region configured to transmit the laser beam.Type: ApplicationFiled: May 9, 2019Publication date: April 2, 2020Inventors: Akifumi SANGU, Alexander VORONOV, Hyoung-Joo KIM, Eun Sun CHOI, Emil ASLANOV, Gyoo Wan HAN
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Publication number: 20190172713Abstract: A laser crystallizing apparatus includes a first light source unit configured to emit a first input light having a linearly polarized laser beam shape. A second light source unit is configured to emit a second input light having a linearly polarized laser beam shape. A polarization optical system is configured to rotate the first input light and/or the second input light at a predetermined rotation angle. An optical system is configured to convert the first input light and the second input light, which pass through the polarization optical system, into an output light. A target substrate is seated on a stage and output light is directed onto the target substrate. A monitoring unit is configured to receive the first input light or the second input light from the polarization optical system and measure a laser beam quality thereof.Type: ApplicationFiled: November 29, 2018Publication date: June 6, 2019Inventors: AKIFUMI SANGU, Gyoowan Han, Jekil Ryu, Kyungjae Lee
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Publication number: 20050088730Abstract: In a polarized light exposure apparatus, light including ultraviolet rays emitted from a lamp 1a is condensed by an elliptic condensing mirror, is made parallel by a lens 5 whose position in an optical axis direction is adjustable by a lens moving mechanism, and enters a polarizing element 6. The light incident to the polarizing element 6 is separated and enters the integrator 7 for making irradiance distributions uniform, so that the light is irradiated on a work piece placed on the light irradiation area. Since the position in the optical axis direction is adjustable, the parallelism (Telecen Degree) to the optical axis of principal rays which are incident to the polarizing element 6 or the integrator 7, can be changed. Thus, it is possible to adjust the position of the lens 5 so as to uniform the polarization direction.Type: ApplicationFiled: October 25, 2004Publication date: April 28, 2005Inventors: Akifumi Sangu, Osamu Osawa