Hyun Hwan
Hyun Hwan Ahn, Sungnam-Shi KR
Patent application number | Description | Published |
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20090025877 | FLAT PANEL DISPLAY MANUFACTURING APPARATUS - Disclosed herein is a flat panel display manufacturing apparatus in a predetermined process is performed using plasma generated therein. In such a flat panel display manufacturing apparatus, a process gas is supplied into a chamber in an evenly diffused state to generate even plasma inside a symmetrical interior space of the chamber. Consequently, the flat panel display manufacturing apparatus can appropriately control flow rate of the plasma, thereby being capable of performing even processing on a large-scale substrate. In the flat panel display manufacturing apparatus, a substrate pedestal thereof is provided with a combination of vertical and horizontal shielding members, thereby being entirely protected from attack of the plasma, resulting in an increased life-span. | 01-29-2009 |
20090078200 | APPARATUS FOR MANUFACTURING FLAT-PANEL DISPLAY - Disclosed herein is a flat panel display (FPD) manufacturing apparatus for performing a desired process for a substrate positioned in a chamber after establishing a vacuum atmosphere in the chamber. The vacuum chamber is divided into a chamber body and an upper cover to ensure easy opening/closing operations of the upper cover. | 03-26-2009 |
20090078373 | APPARATUS FOR MANUFACTURING FLAT-PANEL DISPLAY - Disclosed herein is a flat panel display (FPD) manufacturing apparatus for performing a desired process for a substrate positioned in a chamber after establishing a vacuum atmosphere in the chamber. The vacuum chamber is divided into a chamber body and an upper cover to ensure easy opening/closing operations of the upper cover. | 03-26-2009 |
20090084316 | APPARATUS FOR MANUFACTURING FLAT-PANEL DISPLAY - Disclosed herein is a flat panel display (FPD) manufacturing apparatus for performing a desired process for a substrate positioned in a chamber after establishing a vacuum atmosphere in the chamber. The vacuum chamber is divided into a chamber body and an upper cover to ensure easy opening/closing operations of the upper cover. | 04-02-2009 |
Hyun Hwan Yoo, Suwon-Si KR
Patent application number | Description | Published |
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20150118976 | RADIO FREQUENCY SWITCHING CIRCUIT WITH ADVANCED ISOLATION CHARACTERISTICS - A radio frequency switching circuit may include a first switching circuit unit including first to n | 04-30-2015 |
20150133065 | RF SWITCH - A RF switch may include: a common port coupled to an antenna to transmit and receive first and second high frequency signals; a transmitting switching unit coupled between a transmitting port transferring the first high frequency signal and the common port and including a plurality of switching devices coupled to each other in series; and a receiving switching unit coupled between a receiving port transferring the second high frequency signal and the common port and including a first switching unit including a first switching device. The first switching unit may further include a second switching device having a first terminal coupled to a first terminal of the first switching device and a second terminal coupled to a control terminal of the first switching device. | 05-14-2015 |
20150180465 | RF SWITCH - A radio frequency (RF) switch may include: a common port; a first switching unit; and a second switching unit. The first switching unit further includes a third switching device having one end coupled to a body of one of the plurality of first switching devices and the other end coupled to a first ground terminal, and the second switching unit further includes a fourth switching device having one end coupled to a body of one of the plurality of second switching devices and the other end coupled to a second ground terminal. | 06-25-2015 |
20150214931 | RADIO FREQUENCY SWITCHING CIRCUIT AND ELECTRONIC DEVICE - A radio frequency (RF) switching circuit may include: a first switching circuit unit connected between a first signal port for signal transmission and reception and a common connection node connected to an antenna port and operated according to a first gate signal; a second switching circuit unit connected between a second signal port for signal transmission and reception and the common connection node and operated according to a second gate signal; a negative voltage generating unit generating a negative voltage using a voltage of an RF signal from the common connection node; and a gate signal generating unit generating the first and second gate signals using the negative voltage from the negative voltage generating unit and an operating voltage. | 07-30-2015 |