Abstract:
A TFT array substrate and a manufacturing method thereof are provided to form a gate wiring layer and a pixel electrode as the laminating layer of a metal layer and a transparent conductive layer, remove the metal layer of the pixel electrode in post processing, and connect the pixel electrode and a drain electrode, thereby forming a TN mode TFT array substrate by using a photo mask three times in total. A gate wiring, a gate electrode(112a), and a gate pad(122) are formed as the laminating layer of a first metal layer and a transparent conductive layer(102) on a substrate(111). A pixel electrode(117) is formed with an independent pattern between the gate wirings. A gate insulating layer(113) has first and second open regions(161,162) where the pixel electrode and the gate pad are exposed. A data wiring crosses the gate wiring on the gate insulating layer and defines a sub pixel. A source electrode(115a) is diverged from the data wiring. A drain electrode(115b) is spaced from the source electrode and is connected to the pixel electrode. A data pad(125) is formed in an end of the data wiring. A masking layer(141,142,143) covers the data wiring, the source electrode, and the drain electrode. An oxidation preventing layer(151,152) covers the gate pad and the data pad.
Abstract:
A TFT(Thin Film Transistor) array substrate and its manufacturing method are provided to improve the stability of a substrate manufacturing process and to prevent the failure of contact between upper and lower electrodes due to undercut by preventing the generation of the undercut at a predetermined portion between a gate insulating layer and an inorganic protection layer using an improved contact hole structure composed of a contact hole lower portion and a contact hole upper portion with a large width compared to that of the contact hole lower portion. A gate line is formed on a lower substrate. An organic gate insulating layer(146) is formed on the resultant structure to cover the gate line. An inorganic protection layer(152) is formed on the organic gate insulating layer. A gate pad lower electrode(126) is formed on the resultant structure to be connected with the gate line. A first contact hole for exposing the gate pad lower electrode is formed through the inorganic protection layer and the organic gate insulating layer. A gate pad upper electrode(128) is connected to the gate pad lower electrode through the first contact hole. The first contact hole is composed of a lower portion and an upper portion. The width of the upper portion is larger than that of the lower portion in the first contact hole.
Abstract:
An LCD and a manufacturing method thereof are provided to form PR patterns with different heights by using an exposure device including a DMD(Digital Micro mirror Device) chip, thereby reducing the number of masks by not using a diffraction photo mask or a semitransparent mask and accordingly, manufacturing a TFT(Thin Film Transistor) substrate without using the exposure device with the DMD in all manufacturing processes. A method for manufacturing an LCD(Liquid Crystal Display) comprises the following steps of: providing an exposure device(100) where a light source and plural minute mirrors are arranged, wherein the plural minute mirrors are separately and electrically controlled to reflect light from the light source toward a position of a target selectively; forming at least one thin film(221,223) on a substrate(201) for the LCD; forming PR(PhotoResist) on the thin film; arranging the substrate on the position of the target; and driving the light source, controlling each of the minute mirrors of the exposure device, radiating light to the first position of the PR with first light intensity, and radiating light to the second position of the PR with second light intensity; developing the PR and remaining PR patterns(225a,225b) with different heights on the thin film; and patterning the thin film by using the PR patterns as a mask.
Abstract:
A substrate assembly and a method for manufacturing the same, and a display substrate using the same are provided to repair a gate line and a data line by electrically connecting conductors after coating a conductive pattern on a portion where the conductors in a shape of a bead are damaged or cut. A substrate assembly(100) includes a base member(110) and a conductive pattern(120). The conductive pattern is formed on the base member. A plurality of air gaps are formed inside the conductive pattern by electrically connecting a plurality of conductors(123) of the bead shape. The conductors are made of aluminum, aluminum alloy, gold, gold alloy, silver, silver alloy or the like. The conductive pattern is a gate electrode of a thin film transistor and a gate line connected to the gate electrode.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a thin-film transistor array substrate wherein mobile ions are prevented from infiltrating into a semiconductor layer via gettering effect, neutralization, or the like when a low-grade glass is used for building the substrate. SOLUTION: The method for manufacturing a thin-film transistor array substrate comprises a process of forming a buffer layer on a substrate made of a low-grade glass and a process of building thin-film transistors and picture element electrodes, which include a semiconductor layer, on the buffer layer. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an array substrate for a liquid crystal display device and a method for manufacturing the array substrate, for attaining improvement in productivity by simplifying the manufacturing processes and reducing the number of masks. SOLUTION: The array substrate for a liquid crystal display device is manufactured by using mask processes in a smaller number than a conventional method, which not only simplifies the processes and improves manufacture efficiency but significantly reduces the manufacture cost. In the array substrate for a liquid crystal display device of the present invention, an oxide film is formed as a protective film during forming a channel protective film without separately forming an array substrate protective film, and this prevents failure, improves picture quality as well as reduces a material cost because other equipment and materials are unnecessary. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a liquid crystal display device and a manufacturing method thereof that cut off light leaks caused on the right and left sides of a data line and simplify a repair stage by forming dummy patterns on the right and left sides of the data line and using glass powder for an insulating film. SOLUTION: The manufacturing method includes the stages of: forming a gate electrode, a gate line, and dummy patterns on a substrate; forming a first insulating film on the gate electrode and gate line; forming a switching element comprising a source electrode, a drain electrode, and an active layer on the gate electrode; forming the data line on the substrate so that the data line crosses the gate line and the dummy pattern is disposed on at least one flank; forming a second insulating film on the substrate; forming a first contact hole exposing a portion of the drain electrode by removing a portion of the second insulating film; and forming a pixel electrode electrically connected to the drain electrode through the first contact hole. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an array substrate for a liquid crystal display device with improved productivity by reducing the number of mask processes. SOLUTION: The array substrate includes: a gate line 221 and a gate electrode 222 extending from the gate line 221 formed on a substrate; a data line 261 intersected with the gate line 221 and configured with a gate insulating layer 230, a semiconductor layer 240 and a data metal layer 260; a pixel electrode 281 formed of a first transparent metal layer 281a at a pixel which is defined by the gate line 221 and data line 261; a source electrode 262 extending from the data line 261, and a drain electrode 263 spaced apart from the source electrode 262 to expose a channel; a pattern of a second transparent metal layer 291 formed on the data line 261, the source electrode 262 and the drain electrode 263, and the gate line 221, connecting the drain electrode 263 to the pixel electrode 281m, and having a cut portion over the gate line 221; and a partition wall 293 formed near the second transparent metal layer 291 on the pixel electrode 281. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an etching tape and a method of manufacturing an array substrate for a liquid crystal display device using the same. SOLUTION: The etching tape includes a base sheet, and an etching material layer which a gel type etching material is applied and formed on the base sheet. The method of manufacturing the array substrate for the liquid crystal display device includes: a step of forming a gate electrode, a first electrode of storage capacitor and a gate interconnect line on a transparent insulating substrate; a step of forming a gate insulating film, an active layer, an ohmic wetting layer, a source electrode and a drain electrode, forming a dielectric layer and a second electrode of a storage capacitor, and forming data interconnect line; a step of forming a pixel electrode, forming a gate pad electrode and forming a data pad electrode; a step of forming a protective layer; and a step of forming a contact hole by etching a protective layer formed on the gate pad electrode and a protective layer formed on the data pad electrode by using the etching tape. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
A thin film transistor array substrate comprises a thin film transistor (106) including a gate insulating layer, a semiconductor layer, an ohmic contact layer (150), and a source electrode (110) and a drain electrode (112), where the gate insulating layer includes a gate insulating pattern (146) underlying a data line (104) and a transparent electrode material, and covering a gate line (102). A thin film transistor array substrate comprises a gate line formed on a substrate; a data line formed on the substrate intersecting with the gate line to define a pixel region; a thin film transistor formed at the intersection of the gate line and the data line, the thin film transistor including gate electrode (108) formed on the substrate, a gate insulating layer formed on the gate electrode and the substrate, a semiconductor layer formed on the gate insulating layer, an ohmic contact layer on the semiconductor layer, and a source electrode and a drain electrode on the ohmic contact layer; and a transparent electrode material within the pixel region and connected to the drain electrode of the thin film transistor, where the gate insulating layer includes a gate insulating pattern underlying the data line and the transparent electrode material, and covering the gate line. An independent claim is also included for a method of fabricating a thin film transistor array substrate, comprising forming a first conductive pattern group including a gate line, a gate pad (126), and a gate electrode of a thin film transistor, the thin film transistor connected to the gate line on a substrate; forming a gate insulating film on the substrate including the first conductive pattern group; forming a second conductive pattern group including a data line intersecting the gate line, a source electrode of the thin film transistor connected to the data line, and a drain electrode of the thin film transistor, an ohmic contact layer, and a semiconductor layer for forming a channel region of the thin film transistor; forming a third conductive pattern group including a transparent electrode material connected to the drain electrode; and etching the gate insulating film and the ohmic contact layer using the second and third conductive pattern groups as a mask.