摘要:
There is provided a semiconductor device having a High Electron Mobility Transistor (HEMT) structure allowing for enhanced performance and a method of manufacturing the same. The semiconductor device includes a base substrate; a semiconductor layer provided on the base substrate; a source electrode, a gate electrode and a drain electrode provided on the semiconductor layer to be spaced apart from one another; and an ohmic-contact layer partially provided at an interface between the drain electrode and the semiconductor layer.
摘要:
A three-dimensional porous scaffold and a preparation method thereof. The three-dimensional porous scaffold comprises a biodegradable multifilament draw-textured yarn on the inside of a tubular knitted fabric made of a biodegradable polymer. The three-dimensional porous scaffold has a porosity formed by the network mesh structure of the tubular knitted fabric and the 10-150 μm pores formed in the biodegradable multifilament draw-textured yarn, while it has a bulkiness of 150-1000% due to the biodegradable multifilament drawn textured yarn inserted in the tubular knitted fabric. Thus, the scaffold has a high degree of interconnection between pores, so that cell culture, cell delivery or drug delivery on the stable three-dimensional scaffold structure is performed in an optimized manner.
摘要:
A drum type washing machine is provided, in which vibration is efficiently attenuated, by a maximum capacity within a size-fixed cabinet is provided, and by which a user does not bend over or sit down to load laundry into the washing machine. The drum type washing machine includes a cabinet forming an exterior of the drum type washing machine, a tub fixed within the cabinet, the tub having a laundry loading entrance at an outer circumference of the tub, a drum rotatably provided within the tub, the drum having an opening on a lateral side of the drum to communicate with the laundry loading entrance of the tub, a motor assembly provided next to one side of the drum to rotate the drum, and a suspension assembly provided to support a weight of the drum and attenuate vibration of the drum.
摘要:
Disclosed herein is a monolithic semiconductor device including: a substrate; a high electron mobility transistor (HEMT) structure that is a first device structure formed on the substrate; and a laterally diffused metal oxide field effect transistor (LDMOSFET) structure that is a second device structure formed to be connected with the HEMT structure on the substrate.The monolithic semiconductor device according to preferred embodiments of the present invention is a device having characteristics of a normally-off device while maintaining high current characteristics in a normally-on state, thereby improving high current and high voltage operation characteristics.
摘要:
Provided is a nitride semiconductor device including: a nitride semiconductor layer over a substrate wherein the nitride semiconductor has a two-dimensional electron gas (2DEG) channel inside; a drain electrode in ohmic contact with the nitride semiconductor layer; a source electrode spaced apart from the drain electrode, in Schottky contact with the nitride semiconductor layer, and having an ohmic pattern in ohmic contact with the nitride semiconductor layer inside; a dielectric layer formed on the nitride semiconductor layer between the drain electrode and the source electrode and on at least a portion of the source electrode; and a gate electrode disposed on the dielectric layer to be spaced apart from the drain electrode, wherein a portion of the gate electrode is formed over a drain-side edge portion of the source electrode with the dielectric layer interposed therebetween, and a manufacturing method thereof.
摘要:
There is provided an apparatus for tracking and condensing sunlight of a sliding type which tracks a direction of sunlight according to variations of an altitude or orbit of the sun pivots a solar module plate to maximize condensing efficiency, and strengthens a fixing structure on an inclined ground or inclined building surface by suing a frame structure on the bottom without using a concrete base harmful to natural environment.
摘要:
The present invention provides a semiconductor device including: a base substrate; a semiconductor layer which is disposed on the base substrate and has a 2-Dimensional Electron Gas (2DEG) formed therewithin; a first ohmic electrode disposed on a central region of the semiconductor layer; a second ohmic electrode which is formed on the edge regions of the semiconductor layer in such a manner to be disposed to be spaced apart from the first ohmic electrodes, and have a ring shape surrounding the first ohmic electrode; and a Schottky electrode part which is formed on the central region to cover the first ohmic electrode and is formed to be spaced apart from the second ohmic electrode.
摘要:
Provided is a nitride semiconductor device including: a nitride semiconductor layer over a substrate wherein the nitride semiconductor has a two-dimensional electron gas (2DEG) channel inside; a drain electrode in ohmic contact with the nitride semiconductor layer; a source electrode in Schottky contact with the nitride semiconductor layer wherein the source electrode is spaced apart from the drain electrode; a floating guard ring in Schottky contact with the nitride semiconductor layer between the drain electrode and the source electrode; a dielectric layer formed on the nitride semiconductor layer between the drain electrode and the source electrode and on at least a portion of the source electrode wherein the dielectric layer is applied to the floating guard ring between the drain electrode and the source electrode; and a gate electrode formed on the dielectric layer to be spaced apart from the drain electrode, wherein a portion of the gate electrode is formed over a drain-side edge portion of the source electrode with the dielectric layer interposed therebetween, and a manufacturing method thereof.
摘要:
The present invention relates to a silk nanofiber nerve conduit characterized in that fibroin nanofibers having a diameter of 200 to 400 nm, originated from silk fiber, are stacked layer upon layer to form a porous conduit-shape; and a method for producing thereof, more specifically, to a method for producing a silk nanofiber nerve conduit comprising: (Step 1) preparing a fibrous spinning solution; (Step 2) producing a silk nanofiber of conduit-shape by electrospinning the fibrous spinning solution prepared in step 1 into the cylindrical collecting part coated with polyethyleneoxide; and (Step 3) separating a silk nanofiber of conduit-shape produced in step 2 from the collecting part. The silk nanofiber nerve conduit of the present invention has excellent biocompatibility; allows the body fluid to be exchanged inter in and out of conduit through pores of the conduit, as well; has a proper elasticity, tensile strength, and tear strength. Due to these properties, the silk nanofiber nerve conduit of the present invention helps the regeneration of the nerve injury to recover a motor skill and a sensory function, and thus shows an excellent effect of nerve regeneration. Therefore, the silk nanofiber nerve conduit of the present invention can be used in treating a nerve injury instead of an existing synthetic polymeric nerve conduit.
摘要:
Disclosed is an apparatus for tracking and condensing sunlight of a sliding type which tracks a direction of sunlight according to variations of an altitude or orbit of the sun, pivots a solar module plate to maximize condensing efficiency, and strengthens a fixing structure on an inclined ground or inclined building surface by using a frame structure on the bottom without using a concrete base harmful to natural environment. The apparatus includes: a lower structure; an upper structure which is formed on a top end of the lower structure in the shape of an inverse triangle and has a space portion at the center, a rotation shaft including a bearing being formed on, a top end of which; a solar module plate which condenses sunlight; a rotation plate which pivots in the left-right direction as a central portion of a bottom surface of which is fixed to a top end of the rotation shaft, the solar module plate being formed on a top surface of which; a roller guide which is formed in the space portion at the center of the upper structure along a rotation radius around the rotation shaft; a rotation push rod roller which is formed to be movable with the roller guide; respective rotation push rods which have one ends fixed to both sides of the bottom surface of the rotation plate and the other ends hinge-coupled to the rotation push rod roller; a motor which is formed on the lower structure; a rack pinion which converts a rotational motion of the motor into a linear motion; a driven pipe which is formed on the lower structure and coupled to the rack pinion to perform a linear motion in the left-right direction; and a roller link which has one side hinge-coupled to the driven pipe and the other side hinge-coupled to the rotation push rod roller, and moves the rotation push rod roller along the roller guide in the rotation radius, when the driven pipe moves horizontally. Therefore, the apparatus tracks the direction of sunlight according to variations of the altitude or orbit of the sun, pivots the solar module plate to maximize condensing efficiency, and provides the structure strong against wind or load by firmly fixing the means for fixing and pivoting the solar module plate.