The patent's inventor is Park, Hong-Sick (
This patent was filed on
From the background information supplied by the inventors, news correspondents obtained the following quote: "(a) Field of the Invention The present description relates to a thin film transistor (TFT) array panel for a liquid crystal display (LCD) or an organic light emitting display (OLED), and a manufacturing method for the same.
"(b) Description of the Related Art
"Liquid crystal displays (LCDs) are one of the most widely used type of flat panel displays. An LCD includes a liquid crystal (LC) layer interposed between two panels provided with field-generating electrodes. The LCD displays images by applying voltages to the field-generating electrodes to generate an electric field in the LC layer, which determines orientations of LC molecules in the LC layer to adjust polarization of incident light.
"An LCD including two panels provided with field-generating electrodes, wherein one panel has a plurality of pixel electrodes in a matrix and the other has a common electrode covering the entire surface of the panel, dominates the LCD market.
"The LCD displays images by applying a different voltage to each pixel electrode. For this purpose, thin film transistors (TFTs), which have three terminals to switch voltages applied to the pixel electrodes, are connected to the pixel electrodes and gate lines to transmit signals for controlling the thin film transistors and data lines. Using the gate lines and data lines formed on the thin film transistor array panel, voltages are applied to the pixel electrodes.
"A TFT is a switching element for transmitting the image signals from the data line to the pixel electrode in response to scanning signals from the gate line. The TFT is applied to an active matrix organic light emitting display as a switching element for controlling respective light emitting elements.
"When the size-increase trend of LCDs is considered, a material having low resistivity is desired since the lengths of the gate and data lines increase along with the LCD size. Accordingly, the gate and data lines are required to be formed with a material having low resistivity.
"Ag is well-known for use in signal lines and as a conductor having low resistivity. When Ag is used in signal lines, problems caused by high resistance such as signal delay are solved.
"However, Ag has its set of disadvantages. For example, it does not adhere well to inorganic or organic layer, resulting in lifting or peeling of Ag signal lines. Also, since Ag is susceptible to breakdown by an acid, Ag does not lend itself to being etched with other materials. These disadvantages make it difficult to take advantage of the low resistivity Ag offers, and present obstacles to using Ag in gate lines and data line."
Supplementing the background information on this patent, VerticalNews reporters also obtained the inventor's summary information for this patent: "It is an object of the present invention to solve the above mentioned problems and to provide a thin film transistor array panel that has signal lines having low resistivity and good reliability.
"The present invention provides a signal line comprising a first conductive layer made of a conductive oxide formed at a temperature less than 150.degree. C. and a second conductive layer containing Ag that is deposited adjacent to the first conductive layer.
"The present invention provides a thin film transistor array panel including an insulating substrate, a gate line formed on the insulating substrate, a gate insulating layer formed on the gate line, a drain electrode and a data line having a source electrode formed on the gate insulating layer wherein the drain electrode faces the source electrode with a gap therebetween, and a pixel electrode connected to the drain electrode. At least one of the gate line, the data line, and the drain electrode includes a first conductive layer made of a conductive oxide formed at a temperature less than 150.degree. C., and a second conductive layer containing Ag that is deposited adjacent to the first conductive layer.
"The present invention provides a manufacturing method of a thin film transistor array panel including forming a gate line having a gate electrode on an insulating substrate, sequentially depositing a gate insulating layer and a semiconductor layer on the gate, forming a drain electrode and a data line having a source electrode on the gate insulating layer and the semiconductor layer wherein the drain electrode faces the source electrode with a gap between the drain electrode and the source electrode, and forming a pixel electrode connected to the drain electrode. At least one step of forming a gate line and forming a data line and drain electrode comprises depositing a conductive oxide layer at a temperature less than 150.degree. C. and depositing a conductive layer of an Ag-containing conductor adjacent to the conductive oxide layer."
For the URL and additional information on this patent, see: Park, Hong-Sick.
Keywords for this news article include: Electronics, Semiconductor,
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