Patents by Inventor Jae Chul Lee

Jae Chul Lee 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).

  • Patent number: 6819361
    Abstract: A solid-state imaging device into which is integrated an optical low pass filter serving as the transparent window thereof, this integrated structure simplifying the configuration of the imaging system, reducing its size and manufacturing cost. The optical low pass filter is configured of an optical phase grating low pass filter to obtain satisfactory frequency characteristics. The optical low pass filter is constructed in such a manner that a grating with a predetermined thickness, generating the phase shift of &phgr;, a grating whose thickness is twice the &phgr;-phase shift grating, generating the phase shift of 2&phgr;, and a grating portion generating the phase shift of 0 form a basic pattern, the basic pattern being periodically arranged.
    Type: Grant
    Filed: May 16, 2000
    Date of Patent: November 16, 2004
    Assignee: Havit Co., Ltd
    Inventors: Jae Chul Lee, Sung Woo Lim, Chun Soo Ko, Shi Ho Kim, Yong Ho Oho
  • Patent number: 6759269
    Abstract: In a method for fabricating a Si—Al alloy packaging material, by adding Al—Si alloy powders to Si powders and pressurizing-forming it, or by pressurizing-filling Si powders or a preforming body of Si powders with Al—Si alloy melt, a Si—Al alloy packaging material having good characteristics can be obtained.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: July 6, 2004
    Assignee: Korea Institute of Science and Technology
    Inventors: Hyun-Kwang Seok, Jae-Chul Lee, Ho-In Lee, Jin-Kook Yoon, Ji-Young Byun
  • Publication number: 20040116714
    Abstract: The present invention provides a novel process for preparing a compound represented by the above formula 7, which is an important intermediate for an oral thrombin inhibitor, by one-pot reaction. In accordance with the present invention, the above intermediate for the thrombin inhibitor may be obtained in a high yield.
    Type: Application
    Filed: October 2, 2003
    Publication date: June 17, 2004
    Inventors: Suk Kyoon Yoon, Bong Chan Jung, Won Hyuk Jung, Jae Chul Lee, Koo Lee, Cheol Won Park
  • Publication number: 20030129786
    Abstract: In a method for fabricating a Si—Al alloy packaging material, by adding Al—Si alloy powders to Si powders and pressurizing-forming it, or by pressurizing-filling Si powders or a preforming body of Si powders with Al—Si alloy melt, a Si—Al alloy packaging material having good characteristics can be obtained.
    Type: Application
    Filed: November 1, 2002
    Publication date: July 10, 2003
    Inventors: Hyun-Kwang Seok, Jae-Chul Lee, Ho-In Lee, Jin-Kook Yoon, Ji-Young Byun
  • Publication number: 20030054504
    Abstract: The present invention relates to a novel microorganism, Corynebacterium ammoniagenes strain CJIP009 having Accession No. KCCM-10226, which is capable of producing 5′-inosinic acid and a process for producing 5′-inosinic acid using the same.
    Type: Application
    Filed: August 23, 2002
    Publication date: March 20, 2003
    Inventors: Hyun-Soo Kim, Sung-Oh Chung, Jin-Ho Lee, Sung-Goo Kang, Jeong-Hwan Kim, Soo-Youn Hwang, Byung-Chon Lee, Jae-Chul Lee
  • Patent number: 6415497
    Abstract: The present invention relates to a method for manufacturing a tube-type spray formed product and, in particular, to a method for manufacturing a tube-type spray formed product without using a core. The present invention provides a method for manufacturing a tube-type spray formed product in which a tube-type spray formed product is formed by spraying droplets through an atomizer installed at the position separated from the center portion of a rotating plate as much as the droplets should not sprayed on the center portion of the rotating plate.
    Type: Grant
    Filed: August 17, 2000
    Date of Patent: July 9, 2002
    Assignee: Korea Institute of Science and Technology
    Inventors: Hyun Kwang Seok, Jae Chul Lee, Byung Jo Kim, Don Soo Shin, Ho-In Lee
  • Patent number: 6404554
    Abstract: There is provided an optical low pass filter passing only a lower spatial frequency using a phase grating and the structure of the grating. The optical low pass filter utilizes the two-dimensionally arranged phase grating for the purpose of removing an image with a higher spatial frequency in an imaging system employing a semiconductor solid-state imaging device such as CCD image sensor or CMOS image sensor, The optical low pass filter which suppresses a spatial frequency component higher than a specific frequency and passes a component lower than the specific frequency in an imaging system sensing input images includes a grating generating the phase shift of 0, a grating generating the phase shift of &phgr;, arranged at the right and bottom of the 0-phase shift grating, and a grating generating the phase shift of 2&phgr;, arranged at the diagonal side of the 0-phase shift grating.
    Type: Grant
    Filed: May 18, 2000
    Date of Patent: June 11, 2002
    Assignee: Havit Co., Ltd.
    Inventors: Jae Chul Lee, Sung Woo Lim, Chun Soo Ko, Shi Ho Kim, Yong Ho Oho
  • Publication number: 20020060061
    Abstract: An apparatus for manufacturing sheet metals is disclosed. This apparatus primarily casts a liquid metal into an intermediate sheet through a sheet-casting process, and secondarily strains the intermediate sheet through a continuous shear-straining process, thus forming a desired high quality sheet metal having a high strength, a high formability and a specifically oriented texture without changing the thickness of the intermediate sheet or while slightly changing the thickness. This apparatus thus simplifies the process of manufacturing the sheet steels. The apparatus has a sheet-casting device used for primarily casting a liquid metal into an intermediate sheet, and a continuous shear-straining device used for continuously shear-straining the intermediate sheet from the sheet-casting device to form a desired sheet metal.
    Type: Application
    Filed: May 18, 2001
    Publication date: May 23, 2002
    Inventors: Jae Chul Lee, Hyun Kwang Seok, Jun Hyun Han, Young Hoon Chung, Ho In Lee
  • Patent number: 6370930
    Abstract: The present invention relates to a continuous shear deformation device. In order to occur shear deformation at the position at which a material is inserted into a molding path from a rotary guide apparatus for the purpose of solving the problem that the amount of shear deformation of a material is non-uniform and insufficient due to the gap between the curved portion of the molding path and the lower parts of the material, there is provided a continuous shear deformation device, characterized in that a curved portion is constructed by collaboration between the rotary guide apparatus and the molding path. In addition, there are provided additional constructions for effectively performing shear deformation by a small power by reducing the friction at the molding path excepting the curved portion. The present invention thusly constructed can be utilized for continuously and effectively mass-produce sheared materials.
    Type: Grant
    Filed: August 15, 2000
    Date of Patent: April 16, 2002
    Assignee: Korea Institute of Science and Technology
    Inventors: Jae-Chul Lee, Hyun-Kwang Seok, Jong-Woo Park, Young-Hoon Chung, Ho-In Lee
  • Patent number: 6363765
    Abstract: The present invention relates to a shear deformation device. To improve the productivity by solving the problem that the amount of shear deformation of a material is not uniform and sufficient due to the gap between the curved portion of the molding path and the lower parts of the material and omitting any additional process for removing irregularity and surface products on the surface of the material, there is provided a shear deformation device capable of scalping, characterized in that a scalping guide path which allows the surface of the material to be separated from the other portions of the material as the material is scalped at a predetermined thickness when passing through the curved portion during shear deformation is formed in the curved portion in communication with the molding path. In addition, there are provided additional constructions for effectively performing shear deformation by a small power by reducing the friction at the molding path excepting the curved portion.
    Type: Grant
    Filed: August 15, 2000
    Date of Patent: April 2, 2002
    Assignee: Korea Institute of Science and Technology
    Inventors: Hyun-Kwang Seok, Jae-Chul Lee, Jong-Woo Park, Young-Hoon Chung, Ho-In Lee
  • Patent number: 6284632
    Abstract: According to the present invention, a process of the present invention is performed with stagnated process gas in a chamber. The process comprises the steps of supplying process gas into a chamber, blocking process gas entry and exit from the chamber so as to stagnate the supplied gas therein, and performing the process. As a result, a process time can be significantly reduced, thereby maximizing yield and reducing the substantial amount of the process gas.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: September 4, 2001
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Se-Jin Lee, Jae-Chul Lee, Hyun-Bo Shin, Dae-Hoon Bae
  • Patent number: 6223415
    Abstract: A process for manufacturing an Al—Si alloy for use in a vehicle propeller shaft is provided. The Al—Si alloy manufacturing process includes the steps of heating and melting Al—Si alloy where Si contains 13-40 weight percentage (wt %) of the whole alloy, to thereby prepare melt, maintaining the melt at 700-900° C. and then spraying an high pressure inert gas to the melt and rapidly solidifying the same to thereby obtain a forming body, and extruding the forming body at 400-550° C. The physical properties of the Al—Si alloy manufactured by a spray forming process is at least similar to that of the vehicle propeller shafts which have been already known, and also spotlighted as new alloy compositions which can replace the conventional propeller shaft material.
    Type: Grant
    Filed: March 22, 2000
    Date of Patent: May 1, 2001
    Assignees: Korea Institute of Science & Technology, Dooray Air Metal Co., Ltd.
    Inventors: Don Soo Shin, Byong Jo Kim, Bong Gil Kim, Hyun Kwang Seok, Jae Chul Lee, Ho In Lee
  • Patent number: 6135195
    Abstract: The present invention provides a thixoformable Al alloy composites wherein Si is added to ASTM 2000 series aluminum alloy so that the total Si content thereof may be 1-5 at. % and also a manufacturing method of thixoformable Al alloy composites comprising: obtaining a matrix of the composite containing 1-5 at. % of the total Si content by adding Si to ASTM 2000 series aluminum alloy; holding the matrix in the temperature range of 560-610.degree. C. to obtain a liquid fraction of 40-70% and thereafter performing a thixoforming process.
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: October 24, 2000
    Assignee: Korea Institute of Science and Technology
    Inventors: Jae Chul Lee, Ho In Lee, Ji Young Byun
  • Patent number: 6025248
    Abstract: A method of forming a capacitor includes the step of forming an electrode on an integrated circuit substrate wherein the electrode covers a first portion of the integrated circuit substrate and wherein the electrode exposes a second portion of the integrated circuit substrate. An etch masking pattern including a plurality of ions is formed on the surface of the electrode wherein the etch masking pattern exposes portions of the surface of the electrode. The exposed portions of the electrode are etched using the etch masking pattern as an etching mask so that recesses are formed in the surface of the electrode thereby increasing a surface area thereof. The etch masking pattern is removed, a dielectric layer is formed on the electrode including the recesses, and a conductive layer is formed on the dielectric layer opposite the electrode.
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: February 15, 2000
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hee-seok Kim, Jae-chul Lee, Hyun-woo Lim, Jae-hyong Lee
  • Patent number: 5648129
    Abstract: The present invention provides a melodic novelty party-favor article comprising a housing and an electronic circuit assembly. The housing contains the electronic circuit assembly, which comprises a power source, an integrated circuit unit, a sound production means and a switch mechanism. The switching mechanism comprises two electrically conductive ends and a resistor, wherein the conductive ends are contiguously placed on an outer surface portion of the housing and are not in contact with each other, whereby the circuit assembly is activated by simultaneously contacting the two electrically conductive ends with an electrically conductive article.
    Type: Grant
    Filed: January 25, 1995
    Date of Patent: July 15, 1997
    Inventors: Seung Soo Lee, Jae Chul Lee