Patents by Inventor Young-Chul Noh
Young-Chul Noh 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: 20240121955Abstract: A manufacturing method of a semiconductor device may include: forming a stack comprising first material layers and second material layers that are alternately stacked; forming an opening in the stack; forming a first seed layer in the opening; forming a first buffer layer by surface-treating the first seed layer; and forming a blocking layer by oxidizing the first seed layer through the first buffer layer.Type: ApplicationFiled: March 21, 2023Publication date: April 11, 2024Applicant: SK hynix Inc.Inventors: Jong Gi KIM, Young Jin NOH, Jae O PARK, Jin Ho BIN, Dong Chul YOO, Yoo Il JEON
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Patent number: 9979153Abstract: Disclosed herein is an optical fiber laser device including a seed unit for providing at least two seed lights having different wavelengths; and an amplifying unit for amplifying the at least two seed lights. The amplifying unit includes: a preamplifying unit for amplifying the at least two seed lights by using excitation light of which the wavelength is shorter than the wavelengths of the seed lights; and a final amplifying unit to which no separate excitation light source is provided. The final amplifying unit amplifies the seed light having the longest wavelength by using the other seed light as excitation light with respect to the seed light having the longest wavelength among the at least two seed light.Type: GrantFiled: February 9, 2015Date of Patent: May 22, 2018Assignee: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Bong Ahn Yu, Young Chul Noh, Woo Jin Shin, Chang soo Jung, Yeung Lak Lee
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Publication number: 20170063019Abstract: Disclosed herein is an optical fiber laser device including a seed unit for providing at least two seed lights having different wavelengths; and an amplifying unit for amplifying the at least two seed lights. The amplifying unit includes: a preamplifying unit for amplifying the at least two seed lights by using excitation light of which the wavelength is shorter than the wavelengths of the seed lights; and a final amplifying unit to which no separate excitation light source is provided. The final amplifying unit amplifies the seed light having the longest wavelength by using the other seed light as excitation light with respect to the seed light having the longest wavelength among the at least two seed light.Type: ApplicationFiled: February 9, 2015Publication date: March 2, 2017Inventors: Bong Ahn YU, Young Chul NOH, Woo Jin SHIN, Chang soo JUNG, Yeung Lak LEE
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Patent number: 9543732Abstract: Disclosed is a laser wavelength conversion apparatus. The apparatus includes a focusing lens formed of a birefringent material and configured to have a same refractive index for an infrared laser beam and a green laser beam having different polarization directions and focus the infrared laser beam and the green laser beam without a chromatic aberration, and a sum frequency generator configured to combine the infrared laser beam and the green laser beam focused by the focusing lens to generate an ultraviolet laser beam. The apparatus of the present invention can solve a problem due to a chromatic aberration of the focusing lens, thereby improving a wavelength conversion efficiency and a beam quality.Type: GrantFiled: September 8, 2014Date of Patent: January 10, 2017Assignee: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Changsoo Jung, Young-Chul Noh, Bong-Ahn Yu, Woo Jin Shin, Yeung Lak Lee
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Patent number: 9461436Abstract: The present invention relates to a pulse laser device, and more particularly, to a pulse laser device which can be operated in a burst mode, in which the output of a low-output laser generator is adjusted so as to enable the uniform control of the profile of the peak output of a final output optical pulse train, and in a variable burst mode, in which the profile of the final output optical pulse train can be controlled into an arbitrary waveform.Type: GrantFiled: October 28, 2013Date of Patent: October 4, 2016Assignee: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Young-Chul Noh, Woojin Shin, Bong-Ahn Yu, Yeung Lak Lee, Changsoo Jung
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Patent number: 9450368Abstract: The present invention relates to a pulse laser device, and more particularly, to a pulse laser device which can be operated in a burst mode, in which the output of a low-output laser generator is adjusted so as to enable the uniform control of the profile of the peak output of a final output optical pulse train, and in a variable burst mode, in which the profile of the final output optical pulse train can be controlled into an arbitrary waveform.Type: GrantFiled: December 13, 2011Date of Patent: September 20, 2016Assignee: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Young-Chul Noh, Woojin Shin, Bong-Ahn Yu, Yeung Lak Lee, Changsoo Jung
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Publication number: 20150306704Abstract: Disclosed are a gas-penetration film which is fabricated by processing grooves by irradiating a pulsed laser beam onto a moving film, an apparatus of fabricating the same, and a method of fabricating the same. A method of fabricating a gas-penetration film which irradiates a pulsed laser beam onto a moving film to continuously process grooves, includes splitting the pulsed laser beam; irradiating split pulsed laser beams onto the moving film at a constant interval to process multi-grooves; and controlling a movement speed of the moving film so as to repeatedly process a groove, which is adjacent to the groove processed by the split pulsed laser beam, by the pulsed laser beam. Therefore, the groove processings are repeatedly performed on the same groove to increase a depth of the groove.Type: ApplicationFiled: July 10, 2012Publication date: October 29, 2015Inventors: Ik Bu SOHN, Young Chul NOH, Young Jin CHOI
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Patent number: 9077147Abstract: Disclosed is a burst mode oscillation method for burst mode oscillation by controlling the peak output of light pulses in a laser system. The burst mode oscillation apparatus includes a seed beam generator which receives electrical input signals having different pulse widths, modulates pulse widths and amplitudes of outputs in output light according to the received electrical input signals, and outputs the modulated pulse light, an amplifier which amplifies the modulated pulse light and outputs amplified pulse light, and a non-linear wavelength converter which can control wavelength-converted output light according to the amplitudes of the peak output changed through the pulse widths of the amplified pulse light.Type: GrantFiled: October 12, 2011Date of Patent: July 7, 2015Assignee: Gwangju Institute of Science and TechnologyInventors: Woojin Shin, Young-Chul Noh, Bong-Ahn Yu, Yeung Lak Lee
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Publication number: 20150071313Abstract: Disclosed is a laser wavelength conversion apparatus. The apparatus includes a focusing lens formed of birefringent material and configured to have same refractive index for an infrared laser beam and a green laser beam having different polarization direction and focus the infrared laser beam and the green laser beam without chromatic aberration, and a sum frequency generator configured to combine the infrared laser beam and the green laser beams focused by the focusing lens to generate an ultraviolet laser beam. The apparatus of the present invention can solve a problem due to chromatic aberration of the focusing lens, thereby improving wavelength conversion efficiency and beam quality.Type: ApplicationFiled: September 8, 2014Publication date: March 12, 2015Inventors: Changsoo JUNG, Young-Chul NOH, Bong-Ahn YU, Woo Jin SHIN, Yeung Lak LEE
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Publication number: 20140177033Abstract: The present invention relates to a pulse laser device, and more particularly, to a pulse laser device which can be operated in a burst mode, in which the output of a low-output laser generator is adjusted so as to enable the uniform control of the profile of the peak output of a final output optical pulse train, and in a variable burst mode, in which the profile of the final output optical pulse train can be controlled into an arbitrary waveform.Type: ApplicationFiled: October 28, 2013Publication date: June 26, 2014Applicant: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Young-Chul NOH, Woojin SHIN, Bong-Ahn YU, Yeung Lak LEE, Changsoo JUNG
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Publication number: 20140049811Abstract: The present invention relates to a pulse laser device, and more particularly, to a pulse laser device which can be operated in a burst mode, in which the output of a low-output laser generator is adjusted so as to enable the uniform control of the profile of the peak output of a final output optical pulse train, and in a variable burst mode, in which the profile of the final output optical pulse train can be controlled into an arbitrary waveform.Type: ApplicationFiled: December 13, 2011Publication date: February 20, 2014Applicant: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Young-Chul Noh, Woojin Shin, Bong-Ahn Yu, Yeung Lak Lee, Changsoo Jung
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Publication number: 20130215494Abstract: Disclosed is a burst mode oscillation method for burst mode oscillation by controlling the peak output of light pulses in a laser system. The burst mode oscillation apparatus includes a seed beam generator which receives electrical input signals having different pulse widths, modulates pulse widths and amplitudes of outputs in output light according to the received electrical input signals, and outputs the modulated pulse light, an amplifier which amplifies the modulated pulse light and outputs amplified pulse light, and a non-linear wavelength converter which can control wavelength-converted output light according to the amplitudes of the peak output changed through the pulse widths of the amplified pulse light.Type: ApplicationFiled: October 12, 2011Publication date: August 22, 2013Applicant: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Woojin Shin, Young-Chul Noh, Bong-Ahn Yu, Yeung Lak Lee
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Publication number: 20090052849Abstract: Disclosed are an optical fiber probe for side imaging and a method of manufacturing the same. An optical fiber probe according to an aspect of the invention includes a photonic crystal fiber, and an optical fiber lens that is formed by applying heat to a predetermined region including one end of the photonic crystal fiber and substantially removing air holes formed in the predetermined region. The optical fiber lens includes a light diffusion region that diffuses light propagating along a core of the photonic crystal fiber and focuses the light to enable side imaging, a reflector surface that reflects the light at a right angle to enable side imaging, and a lens surface that focuses the light. A small-sized optical fiber probe can be manufactured using a simple manufacturing process, and the optical fiber probe can be miniaturized. Therefore, a light measurement system can be miniaturized, which makes it possible to obtain side images of a very small sample, such as a blood vessel.Type: ApplicationFiled: July 29, 2008Publication date: February 26, 2009Applicant: Gwangju Institute of Science and TechnologyInventors: Byeong Ha LEE, Hae Young Choi, Seon Young Ryu, Jihoon Na, Ik-Bu Sohn, Young-Chul Noh, Jongmin Lee
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Publication number: 20030002522Abstract: In a CDMA (code division multiple access) digital receiver and an automatic gain control method thereof, when an RF-processed CDMA analog IF (intermediate frequency) signal is inputted, the analog IF signal is converted into a digital IF signal. The digital IF signal is then digital-demodulated, and a digital-demodulated base band signal is clipped so as to have a level of a digital base band signal preset in a CDMA system. Accordingly it is possible to perform a digital demodulation in a CDMA receiver. In addition, it is possible to perform the same automatic gain control as a CDMA analog receiver by receiving the same input signal (analog IF signal) as the CDMA analog receiver. As a result, the performance of a CDMA receiver is significantly improved.Type: ApplicationFiled: May 13, 2002Publication date: January 2, 2003Inventors: Woo-Sik Kim, Young-Chul Noh