摘要:
A method of producing a grain-oriented electrical steel sheet with a very low core loss comprises the steps of obtaining a rolled strip of final product thickness using as a starting material molten steel consisting of not more than 0.10 wt % C, 2.5-7.0 wt % Si, ordinary inhibitor components and the balance of iron and unavoidable impurities, heating the strip to a temperature range of not less than 700.degree. C. at a heating rate of not less than 80.degree. C./s and within 0.1 second after the maximum temperature has been reached cooling the strip at a cooling rate of not less than 50.degree. C./s, and subjecting the strip to decarburization annealing and final finish annealing.
摘要:
A p anode layer (2) is formed on one main surface of an n− drift layer (1). An n+ cathode layer (3) having an impurity concentration more than that of the n− drift layer (1) is formed on the other main surface of the n− drift layer (1). An anode electrode (4) is formed on the surface of the p anode layer (2). A cathode electrode (5) is formed on the surface of the n+ cathode layer (3). An n-type broad buffer region (6) that has a net doping concentration more than the bulk impurity concentration of a wafer and less than that of the n+ cathode layer (3) and the p anode layer (2) is formed in the n− drift layer (1). The resistivity ρ0 of the n− drift layer (1) satisfies 0.12V0≦ρ0≦0.25V0 with respect to a rated voltage V0. The total amount of the net doping concentration of the broad buffer region (6) is equal to or more than 4.8×1011 atoms/cm2 and equal to or less than 1.0×1012 atoms/cm2.
摘要翻译:p阳极层(2)形成在n漂移层(1)的一个主表面上。 在n漂移层(1)的另一个主表面上形成杂质浓度大于n漂移层(1)的n +阴极层(3)。 在p阳极层(2)的表面上形成阳极电极(4)。 在n +阴极层(3)的表面上形成有阴极电极(5)。 n型宽缓冲区(6)的净掺杂浓度大于晶片的体杂质浓度并且小于n +阴极层(3)和p阳极层(2)的净掺杂浓度 漂移层(1)。 相对于额定电压V0,n漂移层(1)的电阻率&rgr0满足0.12V0< nlE;&rgr; 0≦̸ 0.25V0。 宽缓冲区域(6)的净掺杂浓度的总量等于或大于4.8×10 11原子/ cm 2,等于或小于1.0×10 12原子/ cm 2。
摘要:
CAD (Computer Aided Design) data which is reticle design data is input to first and second data conversion devices which respectively convert the CAD data to electron beam (EB) write data and inspection data. The EB write data and inspection data output are input to a data verification device to verify whether or not there is a data conversion error. If no data conversion error is detected by the data verification device, an EB writing device writes a pattern on an unwritten reticle with an electron beam based on the EB write data and develops the reticle, after which the fabricated developed reticle is inspected by a reticle inspection device. As a defect, such as a data conversion error contained in EB write data is detected before fabrication of a reticle, the reticle inspection process is simplified, the effective availability factors of the EB writing device and reticle inspection device and the time needed to fabricate a reticle is made shorter, thereby reducing the fabrication cost.
摘要:
A method of forging a raw material for sintering and forging. The method comprises the steps of: (a) compacting metallic powder containing iron as a main component and graphite to obtain a compact having a predetermined density; (b) sintering the compact at a temperature ranging from 700 to 1000° C. to form a sintered compact having a texture in which graphite is retained at grain boundary of metal powder; (c) compressing the sintered compact from two directions to obtain a compressed sintered compact; and (d) extruding the compressed sintered compact upon pressing the compressed sintered compact from the two directions in a manner that a pressure in one of the two directions is reduced relative to a pressure in the other of the two directions to accomplish extrusion forging.
摘要:
A process for producing a sintered powder metal body is disclosed. A powdery mixture is prepared by blending a graphite powder in amount of not less than 0.3% by weight with an iron based metal powder. The powdery mixture is compacted into a preform having a density of not less than 7.3 g/cm.sup.3. The preform is sintered at a temperature of 800-1000.degree. C. to form the sintered powder metal body having a predetermined structure. The predetermined structure of the sintered powder metal body includes iron based metal particles and graphite particles retained between the iron based metal particles.
摘要:
A process is provided for the preparation of .alpha.-tocopherol. According to the process, a condensation reaction between trimethylhydroquinone and a specific phytol derivative or isophytol is conducted in the presence of any one of the following solvents:(i) a carbonate ester;(ii) a lower fatty acid ester represented by the following formula:R.sup.1 COOR.sup.2 wherein R.sup.1 means a lower alkyl group having 1-4 carbon atoms and R.sup.2 means a lower alkyl group having 1-5 carbon atoms with the proviso that methyl acetate and ethyl acetate are excluded;(iii) a mixed solvent of a nonpolar solvent and a lower alcohol having 1-5 carbon atoms; and(iv) a mixed solvent of the nonpolar solvent and the lower fatty acid ester.
摘要:
A vehicle is provided with a suspension system comprising front and rear suspension systems the suspension characteristics of which are separately variable. The suspension characteristics of the front and rear suspension systems are controlled so that, when the vehicle speed is lower than a predetermined value, the steering characteristic is more toward the oversteer side during rolling of the vehicle than during straight travel of the vehicle and, when the vehicle speed is not lower than the predetermined value, the steering characteristic is fixed irrespective of whether the vehicle rolls.
摘要:
A frame body comprises a first face portion on which a compressive force acts in case a load is applied, a second face portion on which a tensional force acts, and third and fourth face portions which connect the first and second face portions. The third and fourth face portions are respectively equipped with a reinforcing member which comprises a base portion which is away from the frame body and plural base portions which project from the base portion and are joined to the frame body. The convex portions have plural convexities which are arranged so as to extend both in the longitudinal and sectional directions of a frame.
摘要:
With the object of eliminating congestion that has occurred in a station which can not prevent or eliminate the occurrence of congestion autonomously, the SMPP response time in output interfaces 21h-21k of a first PPG 21 are measured and when the time mta, which is m-times of the SMPP response time ta in the normal state, is exceeded, congestion is assumed to occur in an interconnected station of the first PPG 21 and the response to push transfer request in an input interface 21a is delayed. Further, changes in the filling ratio in a buffer memory 21b are monitored and when the filling ratio exceeds h %, a decision is made that congestion has occurred in the first PPG 21 and the response to the push transfer request in the input interface 21a is delayed.
摘要:
The present invention provides a method of producing a polarized lens capable of obtaining a high-quality polarized lens used for sunglasses and the like. More specifically, the present invention is a method of producing a polarized lens, comprising the steps of obtaining a lens made of resin having a polarizing film on a convex surface thereof, masking the convex surface thereof, and dyeing a non-masked surface thereof.