摘要:
Provided is a glass composition for protecting a semiconductor junction which contains at least SiO 2 , Al 2 O 3 , ZnO, CaO and 3 mol% to 10 mol% of B 2 O 3 , and substantially contains none of Pb, P, As, Sb, Li, Na and K. It is preferable that a content of SiO 2 falls within a range of 32 mol% to 48 mol%, a content of Al 2 O 3 falls within a range of 9 mol% to 13 mol%, a content of ZnO falls within a range of 18 mol% to 28 mol%, a content of CaO falls within a range of 15 mol% to 23 mol%, and a content of B 2 O 3 falls within a range of 3 mol% to 10 mol%. According to the glass composition for protecting a semiconductor junction of the present invention, a semiconductor device having a high withstand voltage can be manufactured by using a glass material which contains no lead in the same manner as a conventional case where "a glass material containing lead silicate as a main component" is used.
摘要:
A semiconductor device includes a substrate including silicon carbide; a drift layer disposed over the substrate including a drift region doped with a first dopant and conductivity type; and a second region, doped with a second dopant and conductivity type, adjacent to the drift region and proximal to a surface of the drift layer. The semiconductor device further includes a junction termination extension adjacent to the second region with a width and discrete regions separated in a first and second direction doped with varying concentrations of the second dopant type, and an effective doping profile of the second conductivity type of functional form that generally decreases away from the edge of the primary blocking junction. The width is less than or equal to a multiple of five times the width of the one-dimensional depletion width, and the charge tolerance of the semiconductor device is greater than 1.0×1013 per cm2.
摘要:
An electronic device includes a silicon carbide layer having a first conductivity type and a main junction adjacent a surface of the silicon carbide layer, and a junction termination region at the surface of the silicon carbide layer adjacent the main junction. Charge in the junction termination region decreases with lateral distance from the main junction, and a maximum charge in the junction termination region may be less than about 2x10 14 cm -2 .
摘要:
This invention relates to a semiconductor production method comprising: a step of stacking at least two wide-gap semiconductor layers having different conductive types each other so as to form a wide-gap bipolar semiconductor element having a built-in voltage in the forward direction; and a step of irradiating a gamma ray, an electron beam or a charged particle beam having predetermined irradiation energy to the wide-gap semiconductor layers having stacking faults up to a predetermined amount of irradiation.
摘要:
A power conversion apparatus comprising: switching modules, each of which includes a wide-gap bipolar semiconductor element, a diode element having a wide-gap semiconductor and connected in reverse parallel to the wide-gap bipolar semiconductor element, a package accommodating said wide-gap bipolar semiconductor element and said diode element, and having electrical connection section which connects the wide-gap bipolar semiconductor element and the diode element in reverse parallel and connects the wide-gap bipolar semiconductor element and the diode element having been connected in reverse parallel to external apparatuses. A heating section keeps the wide-gap bipolar semiconductor element and diode element in the package at a predetermined temperature higher than ordinary temperature. A switching circuit is constructed by connecting three series connections, each comprising at least two of the switching modules connected in series, in parallel between the positive pole and the negative pole of a DC power source. A control circuit is provided for each of said switching modules and controls the operation of the switching circuit after each switching module is heated by the heating section and the temperature of each switching module reaches a predetermined temperature.
摘要:
Various integrated circuit devices, in particular a transistor, are formed inside an isolation structure which includes a floor isolation region and a trench extending from the surface of the substrate to the floor isolation region. The trench may be filled with a dielectric material or may have a conductive material in a central portion with a dielectric layer lining the walls of the trench. Various techniques for terminating the isolation structure by extending the floor isolation region beyond the trench, using a guard ring, and a forming a drift region are described.
摘要:
In order to obtain a silicon carbide semiconductor device that ensures both stability of withstand voltage and reliability in high-temperature operations in its termination end-portion provided for electric-field relaxation in the perimeter of a cell portion driven as a semiconductor element, the termination end-portion is provided with an inorganic protection film having high heat resistance that is formed on an exposed surface of a well region as a first region formed on a side of the cell portion, and an organic protection film having a high electrical insulation capability with a little influence by electric charges that is formed on a surface of an electric-field relaxation region formed in contact relation to an outer lateral surface of the well region and apart from the cell portion, and on an exposed surface of the silicon carbide layer.
摘要:
Production of a bipolar semiconductor device having at least part of a region wherein at current passage electrons and holes re-couple with each other formed of an epitaxial layer of silicon carbide grown from a surface of silicon carbide substrate, wherein the epitaxial layer is formed by first performing hydrogen etching of a surface of silicon carbide substrate and thereafter effecting epitaxial growth of silicon carbide from the etched surface. Further propagation of a basal plane dislocation to the epitaxial layer can be reduced by subjecting the surface of silicon carbide substrate to chemical mechanical polishing prior to the hydrogen etching.
摘要:
The invention relates to a universal semiconductor wafer for high-voltage semiconductor components in which at least one layer (5, 6, 7) of a first conduction type is provided on a semiconductor substrate (4) of a first conduction type. A plurality of floating semiconductor regions (8) of the other conduction type are embedded in the boundary surfaces between the semiconductor substrate (4) and the at least one layer. These semiconductor regions are measured such that the measurement of a semiconductor region (8) is smaller compared to the layer thickness of the semiconductor layer (5, 6, 7) and is essentially equal to or less than the distance between the floating semiconductor regions (8) in a boundary surface.