摘要:
Disclosed are a spin transistor and a method of operating the spin transistor. The disclosed spin transistor includes a channel formed of a magnetic material selectively passing a spin-polarized electron having a specific direction, a source formed of a magnetic material, a drain, and a gate electrode. When a predetermined voltage is applied to the gate electrode, the channel selectively passes a spin-polarized electron having a specific direction and thus, the spin transistor is selectively turned on.
摘要:
Disclosed are a spin transistor and a method of operating the spin transistor. The disclosed spin transistor includes a channel formed of a magnetic material selectively passing a spin-polarized electron having a specific direction, a source formed of a magnetic material, a drain, and a gate electrode. When a predetermined voltage is applied to the gate electrode, the channel selectively passes a spin-polarized electron having a specific direction and thus, the spin transistor is selectively turned on.
摘要:
Provided is a semiconductor device that may include a switching device having a negative threshold voltage, and a driving unit between a power terminal and a ground terminal and providing a driving voltage for driving the switching device. The switching device may be connected to a virtual ground node having a virtual ground voltage that is greater than a ground voltage supplied from the ground terminal and may be turned on when a difference between the driving voltage and the virtual ground voltage is greater than the negative threshold voltage.
摘要:
High electron mobility transistors (HEMT) exhibiting dual depletion and methods of manufacturing the same. The HEMT includes a source electrode, a gate electrode and a drain electrode disposed on a plurality of semiconductor layers having different polarities. A dual depletion region exists between the source electrode and the drain electrode. The plurality of semiconductor layers includes an upper material layer, an intermediate material layer and a lower material layer, and a polarity of the intermediate material layer is different from polarities of the upper material layer and the lower material layer.
摘要:
An antenna includes branches having substantially identical shapes. The branches are symmetrically disposed about a central point and extend along at least two concentric patterns whose geometric centers coincide with the central point. The branches each include pattern-forming portions that lie entirely within the concentric patterns, and at least one connecting portion extending between and connecting the pattern-forming portions. Input/output terminals for allowing a voltage to be impressed across the branches are provided at ends of each of the branches.
摘要:
An elementary plasma source for generating plasma is provided. In the elementary plasma source, first and second magnets are shaped like a hollow cylinder, and the second magnet surrounds the first magnet, for forming a magnetic trap between the first and second magnets. A guide provides microwaves to a space between the first and second magnets.
摘要:
An elementary plasma source for generating plasma is provided. In the elementary plasma source, first and second magnets are shaped like a hollow cylinder, and the second magnet surrounds the first magnet, for forming a magnetic trap between the first and second magnets. A guide provides microwaves to a space between the first and second magnets.
摘要:
An electron cyclotron resonance equipment generates plasma by application of a processing gas and microwave energy into a vacuum chamber having a wafer therein in an environment of reduced pressure. The equipment includes a horn antenna assembly mounted onto an uppermost end of the vacuum chamber for radiating the microwave energy supplied from a high-frequency generator into the vacuum chamber. The horn antenna enables extension and retraction in a lengthwise direction to change a flare angle of the horn antenna. The equipment is provided with a fixed antenna and a plurality of mobile antennas to configure a horn antenna assembly, thereby enabling control of the flare angle in the horn antenna as a result of displacement of the mobile antennas. Thus, the uniformity in radiation of the microwave energy within plasma chamber can be controlled with efficiency.
摘要:
An electron cyclotron resonance equipment generates plasma by application of a processing gas and microwave energy into a vacuum chamber having a wafer therein in an environment of reduced pressure. The equipment includes a horn antenna assembly mounted onto an uppermost end of the vacuum chamber for radiating the microwave energy supplied from a high-frequency generator into the vacuum chamber. The horn antenna enables extension and retraction in a lengthwise direction to change a flare angle of the horn antenna. The equipment is provided with a fixed antenna and a plurality of mobile antennas to configure a horn antenna assembly, thereby enabling control of the flare angle in the horn antenna as a result of displacement of the mobile antennas. Thus, the uniformity in radiation of the microwave energy within plasma chamber can be controlled with efficiency.
摘要:
Disclosed is an apparatus for generating inductively-coupled plasma (ICP). The ICP generation apparatus includes a source region where an ICP antenna coil is mounted, the ICP antenna coil generating inductive electric fields for generating plasma and having a serially-connected concentric circle-type structure, the total number of windings of the ICP antenna coil being greater than 2, the ICP antenna coil having a structure in which at least one circular winging closest to the center of the concentric circle is wound in a direction opposite to that of the other windings; a sealed chamber in which a predetermined process is performed on a sample placed on a chuck therein through a reaction between plasma ions and reactive radicals; and a radio frequency (RF) power supply for providing RF electric power of a predetermined frequency to the ICP antenna coil in the source region.