摘要:
In a semiconductor device in which high voltage MOS transistors and low voltage MOS transistors are mixedly mounted, a process is simplified and miniaturization thereof is achieved, without causing a parasitic transistor operation. An active region doped with a low impurity concentration of an impurity is formed in a channel region of a parasitic MOS transistor between two STI (shallow trench isolation) regions, and current flow between a source and a drain of the parasitic MOS transistor is cut off in a semiconductor device in which a high voltage MOS transistor and a microscopic low voltage MOS transistor are mixedly mounted on the same semiconductor substrate.
摘要:
A method for forming an isolation structure on a semiconductor substrate includes opening a portion of a pad oxide layer overlying the substrate using a process gas including an etchant gas and a polymer-forming gas. A portion of the substrate exposed by the opening step is etched to form a trench having a first slope and a second slope. The first slope is greater than 45 degrees, and the second slope is less than 45 degrees. The trench is filled to form the isolation structure.
摘要:
A method for making a semiconductor device having a first active region and a second active region includes providing first and second isolation structures defining the first active region on a substrate. The first active region uses a first operational voltage, and the second active region uses a second operational voltage that is different from the first voltage. A nitride layer overlying the first and second active regions is formed. An oxide layer overlying the nitride layer is formed. A first portion of the oxide layer overlying the first active region is removed to expose a first portion of the nitride layer. The exposed first portion of the nitride layer is removed using a wet etch method while leaving a second portion of the nitride layer that is overlying the second active region intact. Thereafter, a first gate oxide having a first thickness is formed on the first active region, the first gate oxide having a first edge facing the first isolation structure and a second edge facing the second isolation structure. The first edge is separated from the first isolation structure by a first distance. The second edge is separated from the second isolation structure by a second distance. Thereafter, a second gate oxide having a second thickness is formed on the second active region, the second thickness being different than the first thickness.
摘要:
A method of manufacturing a semiconductor device includes defining a first voltage region, a second voltage region, and a third voltage region on a substrate. The first, second, and third voltage regions are configured to handle first, second, and third voltage levels, respectively, that are different from each other. A nitride layer overlying the first, second, and third voltage regions are formed. An oxide layer overlying the nitride layer is formed. The oxide layer is patterned to expose a portion of the nitride layer overlying the first voltage region. The exposed portion of the nitride layer is removed using a wet etch process. A first gate oxide layer overlying the first voltage region is formed. Portions of the oxide layer and the nitride layer overlying the second and third voltage regions are removed. Impurities are selectively implanted into the third voltage region while preventing the impurities from being provided in the second voltage region. A second gate oxide overlying the second voltage region and a third gate oxide overlying the third voltage region are formed simultaneously. The second gate oxide is thicker than the third gate oxide.
摘要:
The present invention relates to an apparatus for focusing particle beams using a radiation pressure capable of obtaining the same flow amount and a narrower particle beam width with respect to the particle size and a higher numeral density. It is possible to form the particle beams by applying the radiation pressure to the particles with respect to the flow condition that cannot form the particle beams with respect to the set particle sizes. There is provided an apparatus for focusing particle beams using a radiation pressure, comprising an orifice part that is provided at a predetermined portion of the flow tube, and a lens having a hole with a predetermined diameter for thereby focusing the particle flow into a particle beam and applying a radiation pressure to the flow particles; and a light source supply part (A) provided at a portion opposite to the discharge outlet of the mixing tube.
摘要:
Disclosed in certain embodiments is a golf training aid comprising a spheroid segment comprising a dimpled outer circumferential surface, a first base surface, and a second base surface.
摘要:
Disclosed in certain embodiments is a golf training aid comprising a spheroid segment comprising a dimpled outer circumferential surface, a first substantially flat base surface, and a second substantially flat base surface, wherein the first substantially flat base surface and the second substantially flat base surface are substantially parallel to each other and are substantially equal in size.
摘要:
Described herein are inbred B6 ES cell lines that exhibit high developmental capacities and have a number of advantages over ES cell lines already available. First, they can be used for gene targeting and have a high percentage of germline transmission when injected into diploid host blastocysts (˜50-80%). Second, these ES cell lines can successfully be used to generate live pups by tetraploid blastocyst complementation, producing a high percentage (15-20%) of mice that are entirely inbred B6 ES cell derived. Third, these ES cells lines can be used to rapidly generate mice that are homozygous for a gene of interest. These advantages indicate that the inbred B6 ES cells provided here facilitate the rapid generation of inbred B6 mouse models in a cost-effective and efficient manner.
摘要:
A method of transmitting data in a multi input, multi output (MIMO) system is disclosed. More specifically, the method includes selecting a primary antenna, based on satisfying at least one specified criteria, for transmitting a preamble, and transmitting the preamble via the primary antenna