Abstract: The present invention provides a multi-stage tilting and multi-rotor flying car including: a main frame externally shaped like a rectangle and internally partitioned to have a grid structure; a body mounted at a center of the main frame in consideration of balance; a plurality of rotors mounted to the main frame to face upward; a plurality of wheels mounted to the main frame to face downward; body wings provided at opposite sides of the body; and an automatic driving controller provided in the body and controlling the rotors and the wheels, thereby having effects on spending only the minimum necessary flying time for taking off and landing in a narrow area, and improving flight performance three times higher in flight time and flight speed and five times higher in fight distance than a rotary-wing aircraft such as a helicopter while flying in the fixed-wing mode.

Abstract: The present invention provides a multi-stage tilting and multi-rotor flying car including: a main frame externally shaped like a rectangle and internally partitioned to have a grid structure; a body mounted at a center of the main frame in consideration of balance; a plurality of rotors mounted to the main frame to face upward; a plurality of wheels mounted to the main frame to face downward; body wings provided at opposite sides of the body; and an automatic driving controller provided in the body and controlling the rotors and the wheels, thereby having effects on spending only the minimum necessary flying time for taking off and landing in a narrow area, and improving flight performance three times higher in flight time and flight speed and five times higher in fight distance than a rotary-wing aircraft such as a helicopter while flying in the fixed-wing mode.

Abstract: A photo-detecting device includes a buried doping layer of a first conductivity type and disposed at an upper portion of a silicon substrate. A first silicon epitaxial layer of first conductivity type is disposed on the buried doping layer, and a second silicon epitaxial layer of second conductivity type is disposed on the first silicon epitaxial layer. An isolation doping layer doped of first conductivity type is disposed at a predetermined region of the second silicon epitaxial layer to define a body region of second conductivity type. A silicon germanium epitaxial layer of second conductivity type is disposed on the body region.

Abstract: A method for manufacturing the same, wherein the monolithic ink-jet printhead includes a manifold for supplying ink, an ink chamber having a hemispheric shape, and an ink channel formed monolithically on a substrate; a silicon oxide layer, in which a nozzle for ejecting ink is centrally formed in the ink chamber, is deposited on the substrate; a heater having a ring shape is formed on the silicon oxide layer to surround the nozzle; a MOS integrated circuit is mounted on the substrate to drive the heater and includes a MOSFET and electrodes connected to the heater. The silicon oxide layer, the heater, and the MOS integrated circuit are formed monolithically on the substrate. Additionally, a DLC coating layer having a high hydrophobic property and high durability is formed on an external surface of the printhead.

Abstract: The piezo-composite curved actuator of the present invention includes a piezoelectric layer 10, a lightweight fiber-reinforced lower composite layer 20 with a high GTE (coefficient of thermal expansion) and a low modulus, which is placed under the piezoelectric layer, a lightweight fiber-reinforced upper composite layer 30 with a low GTE and a high modulus, which is placed on the piezoelectric layer, and an insulator layer 23 placed between the piezoelectric layer and the upper composite layer. The piezo-composite curved actuator may further include an insulator layer 24 placed on the upper composite layer. Also, the piezo-composite curved actuator may further include insulator layers 22 placed between the insulator layer 23 and the lower composite layer 20 at the both sides of the piezoelectric layer 10.

Abstract: A photo-detecting device includes a buried doping layer of a first conductivity type and disposed at an upper portion of a silicon substrate. A first silicon epitaxial layer of first conductivity type is disposed on the buried doping layer, and a second silicon epitaxial layer of second conductivity type is disposed on the first silicon epitaxial layer. An isolation doping layer doped of first conductivity type is disposed at a predetermined region of the second silicon epitaxial layer to define a body region of second conductivity type. A silicon germanium epitaxial layer of second conductivity type is disposed on the body region.

Abstract: An inkjet printer head includes a semiconductor wafer having a nozzle portion for ejecting ink, an ink cartridge for supplying ink to the nozzle portion, and an ink ejection unit interposed between the ink cartridge and the semiconductor wafer. A method of forming the printer head includes forming an ink ejection unit having an opening on a semiconductor wafer to expose an upper surface of the wafer, etching the wafer through the opening in the ink ejection unit to form a nozzle in the semiconductor wafer, and attaching an ink cartridge to the upper surface of the semiconductor wafer.

Abstract: A monolithic ink-jet printhead, and a method for manufacturing the same, wherein the monolithic ink-jet printhead includes a manifold for supplying ink, an ink chamber having a hemispheric shape, and an ink channel formed monolithically on a substrate; a silicon oxide layer, in which a nozzle for ejecting ink is centrally formed in the ink chamber, is deposited on the substrate; a heater having a ring shape is formed on the silicon oxide layer to surround the nozzle; a MOS integrated circuit is mounted on the substrate to drive the heater and includes a MOSFET and electrodes connected to the heater. The silicon oxide layer, the heater, and the MOS integrated circuit are formed monolithically on the substrate. Additionally, a DLC coating layer having a high hydrophobic property and high durability is formed on an external surface of the printhead.

Abstract: The piezo-composite curved actuator of the present invention comprises a piezoelectric layer (10), a lightweight fiber-reinforced lower composite layer (20) with a high CTE (coefficient of thermal expansion) and a low modulus, which is placed under the piezoelectric layer, a lightweight fiber-reinforced upper composite layer (30) with a low CTE and a high modulus, which is placed on the piezoelectric layer, and an insulator layer (23) placed between the piezoelectric layer and the upper composite layer. The piezo-composite curved actuator may further comprise an insulator layer (24) placed on the upper composite layer. Also, the piezo-composite curved actuator may further comprise insulator layers (22) placed between the insulator layer (23) and the lower composite layer (20) at the both sides of the piezoelectric layer (10).

Abstract: A monolithic ink-jet printhead, and a method for manufacturing the same, wherein the monolithic ink-jet printhead includes a manifold for supplying ink, an ink chamber having a hemispheric shape, and an ink channel formed monolithically on a substrate; a silicon oxide layer, in which a nozzle for ejecting ink is centrally formed in the ink chamber, is deposited on the substrate; a heater having a ring shape is formed on the silicon oxide layer to surround the nozzle; a MOS integrated circuit is mounted on the substrate to drive the heater and includes a MOSFET and electrodes connected to the heater. The silicon oxide layer, the heater, and the MOS integrated circuit are formed monolithically on the substrate. Additionally, a DLC coating layer having a high hydrophobic property and high durability is formed on an external surface of the printhead.

Abstract: An inkjet printer head includes a semiconductor wafer having a nozzle portion for ejecting ink, an ink cartridge for supplying ink to the nozzle portion, and an ink ejection unit interposed between the ink cartridge and the semiconductor wafer. A method of forming the printer head includes forming an ink ejection unit having an opening on a semiconductor wafer to expose an upper surface of the wafer, etching the wafer through the opening in the ink ejection unit to form a nozzle in the semiconductor wafer, and attaching an ink cartridge to the upper surface of the semiconductor wafer.

Abstract: A compressed air engine and a flying object using the engine are disclosed. The flying object includes the following elements. That is, the compressed air engine includes: a top member 11 provided with an air inlet 16; an upper cylinder 12; a lower cylinder 13; a bottom member 14; an air pipe, for passing of a compressed air; a shuttle 20 for performing up/down movements within a cylinder formed by the upper and lower cylinders; and a pair of pistons 21a and 21b over and under the shuttle respectively. The pair of the wings are symmetrically and pivotally assembled to the shuttle and the lower cylinder through securing shafts so as to perform up/down movements in accordance with the up/down movements of the shuttle. A compressed air container 2 is assembled to the bottom of the bottom member, for storing the compressed air.

Abstract: A compressed air engine and a flying object using the engine are disclosed. The flying object includes the following elements. That is, the compressed air engine includes: a top member 11 provided with an air inlet 16; an upper cylinder 12; a lower cylinder 13; a bottom member 14; an air pipe, for passing of a compressed air; a shuttle 20 for performing up/down movements within a cylinder formed by the upper and lower cylinders; and a pair of pistons 21a and 21b over and under the shuttle respectively. The pair of the wings are symmetrically and pivotally assembled to the shuttle and the lower cylinder through securing shafts so as to perform up/down movements in accordance with the up/down movements of the shuttle. A compressed air container 2 is assembled to the bottom of the bottom member, for storing the compressed air.

Abstract: A monolithic ink-jet printhead, and a method for manufacturing the same, wherein the monolithic ink-jet printhead includes a manifold for supplying ink, an ink chamber having a hemispheric shape, and an ink channel formed monolithically on a substrate; a silicon oxide layer, in which a nozzle for ejecting ink is centrally formed in the ink chamber, is deposited on the substrate; a heater having a ring shape is formed on the silicon oxide layer to surround the nozzle; a MOS integrated circuit is mounted on the substrate to drive the heater and includes a MOSFET and electrodes connected to the heater. The silicon oxide layer, the heater, and the MOS integrated circuit are formed monolithically on the substrate. Additionally, a DLC coating layer having a high hydrophobic property and high durability is formed on an external surface of the printhead.

Abstract: The present invention to a flying object by flapping motion of two pair of wings, which comprises a compressed air engine, a flying body (or compressed air container) assembled with the compressed air engine and in which compressed air is contained, two pair of wings symmetrically assembled with the compressed air engine and functioning flapping motion up and dawn in the range of 70° while the individual wing being able to get twisted in the range of 15°, a head cover for covering the front and upper part of the compressed air engine, and a tail wing with a horizontal wing and a vertical wing.

Abstract: A compressed air engine and a flying object using the engine are disclosed. The flying object includes the following elements. That is, the compressed air engine includes: a top member 11 provided with an air inlet 16; an upper cylinder 12; a lower cylinder 13; a bottom member 14; an air pipe, for passing of a compressed air; a shuttle 20 for performing up/down movements within a cylinder formed by the upper and lower cylinders; and a pair of pistons 21a and 21b over and under the shuttle respectively. The pair of the wings are symmetrically and pivotally assembled to the shuttle and the lower cylinder through securing shafts so as to perform up/down movements in accordance with the up/down movements of the shuttle. A compressed air container 2 is assembled to the bottom of the bottom member, for storing the compressed air.

Abstract: The present invention relates to a flying object by flapping motion of two pair of wings, which comprises a compressed air engine, a flying body (or compressed air container) assembled with the compressed air engine and in which compressed air is contained, two pair of wings symmetrically assembled with the compressed air engine and functioning flapping motion up and dawn in the range of 70° while the individual wing being able to get twisted in the range of 15°, a head cover for covering the front and upper part of the compressed air engine, and a tail wing with a horizontal wing and a vertical wing.

Abstract: Methods of forming bipolar junction transistors include the steps of forming a first insulating layer on a face of a semiconductor substrate containing a collector region of first conductivity type therein and then forming an opening in the first insulating layer to expose the collector region at the face. An extrinsic base region contact layer of second conductivity type is then formed on the first insulating layer and in the opening and then an extrinsic base region of second conductivity type is formed in the collector region, at the opening in the first insulating layer. Next, a second insulating layer is formed on the extrinsic base region contact layer and first insulating layer, using the first insulating layer as a mask to prevent contact between the second insulating layer and the collector region at the face.