Patents by Inventor Yong-Ki Min

Yong-Ki Min 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: 5835293
    Abstract: An array of M.times.N thin film actuated mirrors for use in an optical projection system comprises an active matrix, an array of M.times.N thin film actuating structures, each of the thin film actuating structures being provided with a first and a second actuating parts, each of the first and second actuating parts including at least a thin film layer of a motion-inducing material, a pair of electrodes, each of the electrodes being provided on top and bottom of the motion-inducing thin film layer, an array of M.times.N supporting members, each of the supporting members being used for holding each of the actuating structures in place by cantilevering each of the actuating structures and also for electrically connecting each of the actuating structures and the active matrix, and an array of M.times.
    Type: Grant
    Filed: November 16, 1994
    Date of Patent: November 10, 1998
    Assignee: Daewoo Electronics Co., Ltd.
    Inventors: Yong-Ki Min, Myoung-Jin Kim
  • Patent number: 5834163
    Abstract: A method for electrically connecting a thin film electrode to a connecting terminal on an active matrix in the manufacture of a thin film actuated mirror is disclosed. The method includes the steps of: forming a thin film sacrificial layer having an empty cavity on top of the active matrix; forming an elastic, a second thin film and a thin film electrodisplacive layers, successively, on top of the thin film sacrificial layer including the empty cavity; forming a contact hole extending from top of the thin film electrodisplacive layer to top of the connecting terminal; forming a first thin film layer on top of the thin film electrodisplacive layer including the contact hole; patterning the first thin film, the thin film electrodisplacive, the second thin film and the elastic layers, respectively; and removing the thin film sacrificial layer, thereby forming the thin film actuated mirror.
    Type: Grant
    Filed: August 20, 1996
    Date of Patent: November 10, 1998
    Assignee: Daewoo Electronics Co., Ltd.
    Inventors: Yong-Ki Min, Min-Sik Um
  • Patent number: 5815305
    Abstract: The thin film AMA has a substrate, an actuator, a common line, and a reflecting member. The substrate has an electrical wiring and a connecting terminal and the actuator has a supporting layer, a bottom electrode, a top electrode, and an active layer. The common line is formed on a portion of actuator and is connected to top electrode. The electrical wiring and connecting terminal may not be damaged because actuator is formed on a portion of substrate adjacent to the portion where electrical wiring and connecting terminal are formed. The voltage drop of a second signal can be minimized because common line is formed thickly on a portion of actuator, so a sufficient second signal is applied to top electrode. The flatness of reflecting member may be enhanced because reflecting member is formed on a second sacrificial layer.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: September 29, 1998
    Assignee: Daewoo Electronics Co., Ltd.
    Inventors: Yong-Ki Min, Yoon-Joon Choi
  • Patent number: 5808782
    Abstract: A method for electrically connecting a thin film electrode with a connecting terminal on an active matrix in a thin film actuated mirror includes the steps of: forming a thin film sacrificial layer having an empty cavity on top of the active matrix, wherein the empty cavity encompasses the connecting terminal; forming an elastic layer on top of the thin film sacrificial layer including the empty cavity; creating a hole on the elastic layer, the hole exposing the connecting terminal and having inner surfaces; forming the thin film electrode on top of the elastic layer including the inner surfaces of the hole to thereby establish an electrical connection between the thin film electrode to the connecting terminal; and filling the hole with an insulating material. The insulating material prevents the thin film electrodes in each of the thin film actuated mirrors from coming into an electrical contact with each other, thereby preventing a short-circuit therebetween.
    Type: Grant
    Filed: July 29, 1996
    Date of Patent: September 15, 1998
    Assignee: Daewoo Electronics, Co., Ltd.
    Inventor: Yong-Ki Min
  • Patent number: 5774256
    Abstract: A method for manufacturing an array of M.times.
    Type: Grant
    Filed: December 13, 1995
    Date of Patent: June 30, 1998
    Assignee: Daewoo Electronics Co., Ltd.
    Inventors: Yong-Ki Min, Myung-Kwon Koo, Jae-Hyuk Chung
  • Patent number: 5768006
    Abstract: An inventive array of thin film actuated mirrors is provided with an active matrix having an array of switching devices, an array of actuating structures and an array of mirrors, wherein each of the actuating structures is cantilevered on the active matrix, and each of the switching devices is positioned on the active matrix beside the position at which each of the actuating structures is cantilevered. In the array, during the operation of the array, since each of the mirrors is connected to the actuating structure through a recessed portion thereof, the mirror stays planar, allowing more accurate and effective reflection of the light beams, which will, in turn, enhance the overall optical efficiency of the array.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: June 16, 1998
    Assignee: Daewoo Electronics Co., Ltd.
    Inventors: Yong-Ki Min, Yong-Bae Jeon
  • Patent number: 5760947
    Abstract: An array of M.times.N thin film actuated mirrors for use in an optical projection system comprises an active matrix, an array of M.times.N thin film actuating structures, each of the thin film actuating structures including at least a thin film layer of a motion-inducing material, a pair of electrodes, each of the electrodes being provided on top and bottom of the thin film motion-inducing layer, an array of M.times.N supporting members, each of the supporting members being used for holding each of the actuating structures in place by cantilevering each of the actuating structures and also for electrically connecting each of the actuating structures and the active matrix, an array of M.times.N spacer members, each of the spacer members being mounted on the top surface of each of the actuating structures at the distal end thereof, and an array of M.times.N mirror layers for reflecting light beams, each of the mirror layers being secured on each of the spacer members of the actuating structures.
    Type: Grant
    Filed: November 8, 1994
    Date of Patent: June 2, 1998
    Assignee: Daewoo Electronics Co., Ltd.
    Inventors: Dong-Kuk Kim, Jeong-Beom Ji, Yong-Ki Min
  • Patent number: 5757539
    Abstract: An inventive array of M.times.N thin film actuated mirrors includes an active matrix, an insulating layer, an etchant stopping layer, and an array of M.times.N actuating structures. Each of the actuating structures has a tip at a distal end thereof and an etching aperture traversing therethrough, and further includes a first thin film electrode with a horizontal stripe, a thin film electrodisplacive member, a second thin film electrode, an elastic member and a conduit. The horizontal stripe, the tip and the etching aperture are created in order to increase the optical efficiency of each of the thin film actuated mirrors, facilitate the removal of the rinse and allow easy removal of the thin film sacrificial layer, respectively.
    Type: Grant
    Filed: February 16, 1996
    Date of Patent: May 26, 1998
    Assignee: Daewoo Electronics Co. Ltd
    Inventor: Yong-Ki Min
  • Patent number: 5754331
    Abstract: An inventive array of M.times.N thin film actuated mirrors includes an active matrix and an array of M.times.N actuating structures. Each of the actuating structures includes an upper thin film electrode, a thin film electrodisplacive member, a lower thin film electrode, an elastic member and a conduit. In the array, since the upper thin film electrode is electrically connected individually to the active matrix through the conduit in each of the actuated mirrors, if one thereof becomes inoperable for any reason, e.g., short-circuit due to the scratch in the upper thin film electrode, other thin film actuated mirrors in the same row or column in the array 200 are not affected.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: May 19, 1998
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Yong-ki Min
  • Patent number: 5735026
    Abstract: The inventive method for the manufacturing an array of M.times.N electrodisplacive actuated mirrors comprises a step of: preparing a ceramic wafer, made of an electrodisplacive material, having a top and bottom surface; forming an array of M.times.N first electrodes and an array of M+1 second electrodes on the bottom and top surface of ceramic wafer, respectively; mounting the ceramic wafer on top of an active matrix; covering each of the M +1 second electrodes with an insulating layer; forming a set of M trenches; placing an array of M.times.N hinges on the top surface of the ceramic wafer; and forming a mirror on the top surface of each of the M.times.N hinges to thereby form an array of M.times.N electrodisplacive actuated mirrors.
    Type: Grant
    Filed: July 20, 1994
    Date of Patent: April 7, 1998
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Yong-Ki Min
  • Patent number: 5708524
    Abstract: An array of M.times.N thin film actuated mirrors includes an active matrix including a substrate with an array of M.times.N pairs of connecting terminals and an array of M.times.N transistors, and an array of M.times.N actuating structures, each of the actuating structures having an actuating and a light reflecting portions, wherein the actuating portion further includes a first and a second parts. Each of the actuating structures is provided with a first thin film electrode, a thin film electrodisplacive member, a second thin film electrode, an elastic member and a first and a second conduits.
    Type: Grant
    Filed: May 3, 1996
    Date of Patent: January 13, 1998
    Assignee: Daewoo Electronics Co.,Ltd.
    Inventor: Yong-Ki Min
  • Patent number: 5706121
    Abstract: An array of M.times.N thin film actuated mirrors includes an active matrix having a substrate, an array of M.times.N connecting terminals and an array of M.times.N transistors, and an array of M.times.N actuating structures. Each of the actuating structures is of a bimorph structure and includes an actuating portion and a light reflecting portion, the actuating portion including a front portion of a second thin film electrode, a lower electrodisplacive member, an intermediate electrode, an upper electrodisplacive member, and a front portion of a first thin film electrode. The front portion of the second thin film electrode is electrically connected to each of the connecting terminals and each of the transistors, and the remaining portion of the first thin film electrode is placed on top of the remaining portion of the second thin film electrode to form the light reflecting portion, allowing the first and the second thin film electrodes to function as a signal electrode.
    Type: Grant
    Filed: November 30, 1995
    Date of Patent: January 6, 1998
    Assignee: Daewoo Electronics, Co., Ltd.
    Inventor: Yong-Ki Min
  • Patent number: 5701192
    Abstract: An array of thin film actuated mirrors includes an active matrix and an array of actuating structures, each of the actuating structures including an elastic member, a pair of conduits, a second thin film electrode with a stripe, a thin film electrodisplacive member and a first thin film electrode.
    Type: Grant
    Filed: April 29, 1996
    Date of Patent: December 23, 1997
    Assignee: Daewoo Electronics Co., Ltd.
    Inventors: Jeong-Beom Ji, Yong-Ki Min
  • Patent number: 5696618
    Abstract: An array of M.times.N electrodisplacive actuated mirrors for use in an optical projection system is assembled by way of: (a) preparing two identical ceramic wafers; (b) forming M identical trenches thereon; (c) interlocking and bonding together to form a ceramic block; (d) forming a composite ceramic structure from the ceramic block by polishing the top and bottom surfaces thereof; (e) providing M.times.N signal electrodes and M+1 bias electrodes; (f) mounting on an active matrix to thereby form an array of M.times.N actuators; (g) placing M+1 photoresistive segments; (h) preparing places for attaching platforms, to be formed thereon a light reflecting layer; (i) forming a light reflecting layer; (j) pattering the light reflecting layer, including the platform, into an array of M.times.N mirrors; and (k) removing the M+1 photoresistive segments to thereby form the array of M.times.N electrodisplacive actuated mirrors.
    Type: Grant
    Filed: September 22, 1994
    Date of Patent: December 9, 1997
    Assignee: Daewoo Electronics Co., Ltd.
    Inventors: Jeong-Beom Ji, Yong-Ki Min
  • Patent number: 5690839
    Abstract: A method for forming an array of thin film actuated mirrors for use in an optical projection system comprises the steps of: (a) providing a base; (b) depositing a separation layer on top of the base; (c) forming a first an electrodisplacive, a second, an elastic and a sacrificial layers successively on top of the separation layer; (d) forming an array of M.times.N supporting members, each thereof having a conduit; (e) patterning to form an array of multilayered actuated mirror structures; (f) attaching an active matrix included therein an array of transistors to the array of multilayered actuated mirror structures; (g) separating the base to form said array of thin film actuated mirrors. In the inventive method, the heat treatment of the electrodisplacive layer is carried out prior to the attaching of the active matrix, thereby preventing the transistors from being degraded by the heat.
    Type: Grant
    Filed: May 4, 1995
    Date of Patent: November 25, 1997
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Yong-Ki Min
  • Patent number: 5663830
    Abstract: An array of M.times.N actuated mirrors comprises an active matrix, an array of M.times.N elastic members, an array of M.times.N pairs of actuating structures and an array of M.times.N mirrors. Each of the elastic members is provided with a distal and a proximal ends, the proximal end including a first and a second tab portions, the first tab and the second tab portions being separated by a retraction therebetween, the distal end including a protrusion. Each of the actuating structures is located on the first and the second tab portions on each of the elastic members, respectively. Each of the mirrors is formed on top of the elastic members. When the pair of actuating structures deform in response to an electrical signal, the first and the second tab portions tilt while the remainder of the elastic member, and, the mirror formed on top thereof, stays planar, thereby allowing all of the mirrors to reflect the light beams.
    Type: Grant
    Filed: March 7, 1995
    Date of Patent: September 2, 1997
    Assignee: Daewoo Electronics Co., Ltd.
    Inventors: Jeong-Beom Ji, Yong-Ki Min
  • Patent number: 5627673
    Abstract: An array of M.times.N thin film actuated mirrors for use in an optical projection system comprises an active matrix, an array of M.times.N supporting members, and an array of M.times.N thin film actuating structures. Each of the actuating structures includes a first, an electrodisplacive, a second layers and an elastic layer, wherein the first and the seconds layers are placed on top and bottom of the electrodisplacive layer, and the elastic layer is placed on bottom of the second layer. The first layer is divided into a proximal and a distal ends. In each of the actuated mirrors, the proximal end of the first layer is connected to a conduction line pattern to thereby act as a bias electrode and the second layer is connected electrically to one of the transistors through a conduit placed in each of the supporting members to thereby act as a signal electrode. The distal end of the first layer functions as a mirror for reflecting the light beam.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: May 6, 1997
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Yong-Ki Min
  • Patent number: 5610773
    Abstract: An array of M.times.N thin film actuated mirrors for use in an optical projection system comprises an active matrix, an array of M.times.N supporting members, M.times.N trinities of first, second and third conduits and an array of M.times.N thin film actuating structures. Each of the actuating structures includes a first, an electrodisplacive and a second layers, wherein the first and seconds layers are placed on top and bottom of the electrodisplacive layer. In each of the actuated mirrors, the first layer therein is connected, individually and electrically, to a conduction line pattern through the second and the third conduits, thereby acting as bias electrode and the second layer is connected electrically to one of the transistors included in through the first conduit to thereby act as a signal electrode.
    Type: Grant
    Filed: April 25, 1995
    Date of Patent: March 11, 1997
    Assignee: Daewoo Electronic Co. Ltd.
    Inventor: Yong-Ki Min
  • Patent number: 5606452
    Abstract: An array of M.times.N thin film actuated mirrors includes an active matrix having a substrate with an array of M.times.N connecting terminals and an array of M.times.N transistors, and an array of M.times.N actuating structures, wherein each of the actuating structures being a bimorph structure, includes a second thin film electrode, a lower electrodisplacive member, an intermediate thin film electrode, an upper electrodisplacive member and a first thin film electrode.
    Type: Grant
    Filed: October 25, 1995
    Date of Patent: February 25, 1997
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Yong-Ki Min
  • Patent number: 5604623
    Abstract: An array of M.times.N thin film actuated mirrors for use in an optical projection system, includes an active matrix, an array of M.times.N actuating structures, an array of M.times.N mirror layers and an array of M.times.N supporting members. Each of the actuating structures includes a first a second and a third identically structured actuating parts, each of the actuating parts having at least a motion-inducing thin film layer, a first and a second electrodes. The first electrode from each of the actuating parts is connected to ground, thereby serving as the bias electrode, and the second electrode thereof functions as the signal electrode. Each of the mirror layers is provided with an odd number of tab portions, each of the tab portions being partially separated from the neighboring tab portions by a dividing slot therebetween.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: February 18, 1997
    Assignee: Daewoo Electronics Co., Ltd.
    Inventors: Jeong-Beom Ji, Yong-Ki Min