摘要:
A method for inhibiting or blocking molecular generating and/or inducing functions of molecules using an inhibitory or blocking agent of the formula: wherein R1-6 are as defined herein.
摘要:
This semiconductor device comprises a first semiconductor layer of a first conductivity type, an epitaxial layer of a first conductivity type formed in the surface on the first semiconductor layer, and a base layer of a second conductivity type formed on the surface of the epitaxial layer. Column layers of a second conductivity type are repeatedly formed in the epitaxial layer under the base layer at a certain interval. Trenches are formed so as to penetrate the base layer to reach the epitaxial layer; and gate electrodes are formed in the trenches via a gate insulation film. A termination layer of a second conductivity type is formed on the epitaxial layer at an end region at the perimeter of the base layer. The termination layer is formed to have a junction depth larger than that of the base layer.
摘要:
A semiconductor element is provided, comprising a first semiconductor layer of the first conduction type; and a pillar layer including first semiconductor pillars of the first conduction type and second semiconductor pillars of the second conduction type arranged periodically and alternately on the first semiconductor layer. A semiconductor base layer of the second conduction type is formed on the upper surface of the pillar layer, And a second semiconductor layer of the first conduction type is formed on the upper surface of the semiconductor base layer. A control electrode of the trench gate type is formed in a trench, which is formed in depth through the semiconductor base layer to the first semiconductor pillar. The control electrode is tapered such that the width thereof decreases with the distance from a second main electrode toward a first main electrode and the tip thereof locates almost at the center of the first semiconductor pillar.
摘要:
A power MOSFET includes an n-type drift layer and a p-type base layer formed in a layered manner on the n-type drift layer. Trench gates are formed to penetrate the p-type base layer to reach the n-type drift layer. On the p-type base layer, n+-type source regions and p+-type regions are formed. These n+-type source regions and p+-type regions are arranged alternately along a longitudinal direction of the trench gates. The n+-type source regions and the p+-type regions are arranged with a slant with respect to the longitudinal direction of the trench gates.
摘要:
A semiconductor device includes a first conductivity type layer and a second conductivity type layer, which are alternately and repeatedly positioned, adjacent to each other, in a column-like fashion on a first conductivity type substrate. The balance of the net charge amount of the impurity between the first conductivity type layer formed under a second conductivity type base layer in the termination region of the semiconductor device and the second conductivity type layer adjacent to the first conductivity type layer is imbalanced in comparison to the balance of the net charge amount of the impurity between the first conductivity type layer in the device-forming region of the semiconductor device and the second conductivity type layer adjacent to the first conductivity type layer.
摘要:
This semiconductor device an epitaxial layer of a first conductivity type formed on a surface of the first semiconductor layer, and a base layer of a second conductivity type formed on a surface of the epitaxial layer. A diffusion layer of a first conductivity type is selectively formed in the base layer, and a trench penetrates the base layer to reach the epitaxial layer. A gate electrode is formed in the trench through the gate insulator film formed on the inner wall of the trench. A first buried diffusion layer of a second conductivity type is formed in the epitaxial layer deeper than the bottom of the gate electrode. A second buried diffusion layer connects the first buried diffusion layer and the base layer and has a resistance higher than that of the first buried diffusion layer.
摘要:
In a main circuit 11 of the plasma cutter power supply device 6, a plurality of DC power units 14-1, . . . 14-n of low capacity are connected in parallel on their DC output sides, and are connected to a plasma torch 20. Each power unit 14-1, . . . 14-n can operate asynchronously and independently from each other. The power supply control device 6 controls the number of power units to be operated, and the intensity of output electrical current at which each of them is to be operated, according to the cutting conditions (the nature of the material to be cut, its thickness, and the cutting speed) and according to the number of power units which can be operated. If some of the power units are faulty, the power supply control device 6 controls the cutting conditions which can be accepted, according to the number of normal power units.
摘要:
In a thermal cutting machine such as plasma cutting machine or a laser cutting machine, control of the moving speed of a cutting head (24) is improved so as to increase throughput of the cutting machine with increase in cost restricted. Products are cut out one by one from a plate member (14) while a cutting head (24) is moved relative to the plate member (14) on a table (12). In this process, when the cutting head (24) is fast-forwarded without performing cutting to a position at which cutting of each product starts, the speed of movement in the direction (Y-axis direction) along a short side of the table (12) is controlled at a speed higher than that of the movement in the direction (X-axis direction) along a long side of the table. The pattern of a sequence of cutting out the products from the plate member (14) is a meandering pattern in which reciprocation in the Y-axis direction dominates and the movement in the X-direction is one time one way. Exhaust chambers are arranged in the X-axis direction in the table (12), and the exhaust chambers are driven as the cutting head (24) moves in the X-axis direction.
摘要:
A P++-type first diffusion layer is formed by diffusing P-type impurities on a front side of an N−-type semiconductor substrate, and an N-type fourth diffusion layer which is shallower than the first diffusion layer is formed by diffusing N-type impurities on the front side, and a P-type second diffusion layer is locally formed in a ring-shape so as to be exposed on the lateral side by diffusing P-type impurities on the back side, and P-type impurities are diffused on the back side of the substrate and a P+-type third diffusion layer is locally formed so as to be distributed inward from the second diffusion layer and not to be exposed to the lateral side, and the P-type second diffusion layer and the P+-type third diffusion layer are formed in the two-stage structure, thereby various characteristics can be improved.