Abstract:
The present invention relates to a photodetector using MOSFET with quantum channels and a method for making thereof. A photodetector using MOSFET with quantum channels according to the present invention comprises a quantum channel formed on an activated SOI wafer, a gate oxide film covering said quantum channel; a gate formed so as to control carrier current at said quantum channel; a source and a drain formed at both ends of said channel area; and metal layers connected with said gate, said source and said drain. Thus, the photodetector according to the present invention can obtain more excellent photocurrent characteristics compared with the existing SOI MOSFET device by forming quantum channels on the SOI MOSFET. The MOSFET with quantum channels according to the present invention can be used as a good photodetector maintaining advantages of the existing MOSFET such as ease in integration and high speed.
Abstract:
PURPOSE: A growth method of GaN on an SI by modulating a source flux are provided to grow a second GaN layer without a crack by inserting an AlGaN layer between an AlN buffer layer and a first GaN layer as a buffer layer. CONSTITUTION: A metal N compound of an N saturation is deposited in a substrate to form a first metal N compound layer. The metal N compound is deposited in the first metal N compound layer to form a second metal N compound layer. A GaN of N saturation is deposited on a second metal N compound layer to form a first GaN layer. A GaN of Ga saturation is deposited in the first GaN layer to form a second GaN layer.
Abstract:
PURPOSE: A method for manufacturing a nitride based semiconductor device including a floated gate electrode is provided to improve operation speed of a nitride based semiconductor device by reducing parasitic capacitance due to high dielectric constant of a protective layer. CONSTITUTION: An epilayer(20,30,40) is formed on a base substrate(10). A source electrode(61) and a drain electrode(63) are formed on the epilayer at regular intervals. A protective layer(70) is formed for covering the epilayer. A gate contact hole(76) is formed between the source electrode and the drain electrode. The gate electrode(65) includes an electrode unit floated on a connection unit and the protective layer.
Abstract:
PURPOSE: A substrate holder for a molecular beam epitaxy apparatus is provided to reduce unevenness of a thermal expansion coefficient and processing temperature of a substrate, thereby minimizing crack generation within the substrate in a high temperature heating process. CONSTITUTION: A substrate holder(10') is formed into a tube shape which is opened in up and down directions. A protrusion(11) is arranged along the circumference in the inner surface of the substrate holder in order to horizontally mount an epitaxy target substrate(D). A plurality of supporting projections(12) is arranged in the upper surface of the protrusion in order to separate the substrate from the protrusion. A step shape groove is arranged in the inner upper part of the substrate holder. The substrate holder is manufactured with pure molybdenum or molybdenum alloy.
Abstract:
PURPOSE: A transistor having a heat dissipation structure is provided to effectively radiate heat generated from an electrode to the outside. CONSTITUTION: A substrate(10) has a front side and a back side. Multiple nitride layers(12, 14, 16, 18, 19) are formed on the front side of the substrate. A source electrode(31), a gate electrode(33) and a drain electrode(35) are formed on the multiple nitride layers. A heat radiation structure includes a cooling groove and a radiation layer(43). The cooling groove is formed on the back side of the substrate so that the substrate includes an area in which a plurality of electrodes is formed. The radiation layer is formed on the inner side of the cooling groove.