摘要:
A manufacturing method of a semiconductor device includes: forming multiple trenches on a semiconductor substrate; forming a second conductive type semiconductor film in each trench to provide a first column with the substrate between two trenches and a second column with the second conductive type semiconductor film in the trench, the first and second columns alternately repeated along with a predetermined direction; thinning a second side of the substrate; and increasing an impurity concentration in a thinned second side so that a first conductive type layer is provided. The impurity concentration of the first conductive type layer is higher than the first column. The first column provides a drift layer so that a vertical type first-conductive-type channel transistor is formed.
摘要:
A semiconductor device includes a semiconductor substrate, a cell region, an outer peripheral region, a field plate, an outermost peripheral ring, outer peripheral region layer, an insulator film, and a Zener diode. The semiconductor substrate has a superjunction structure. The outer peripheral region is disposed at an outer periphery of the cell region. The Zener diode is disposed on the insulator film for electrically connecting the field plate with the outermost peripheral ring. The Zener diode has a first conductivity type region and a second conductivity type region that are alternately arranged in a direction from the cell region to the outer peripheral region.
摘要:
A semiconductor device having a super junction structure includes: multiple first columns extending in a current flowing direction; and multiple second columns extending in the current flowing direction. The first and second columns are alternately arranged in an alternating direction. Each first column provides a drift layer. The first and second columns have a boundary therebetween, from which a depletion layer expands in case of an off-state. At least one of the first columns and the second columns have an impurity dose, which is inhomogeneous by location with respect to the alternating direction.
摘要:
Metallic films are formed on a silicon substrate on which an insulation film and a conductive portion are exposed. The metallic films include a first metallic film directly contacting the insulation film and the conductive portion and a second metallic film disposed on the first metallic film as a stress adjustment film to control a stress at an interface between the first metallic film and the underlying member. Accordingly, an adhesion between the first metallic film and the insulation film can be controlled to be smaller than that between the first metallic film and the conductive portion. Then, the metallic film is removed from the insulation film by an adhesive sheet selectively while remaining on the conductive portion. As a result, the metallic film can be patterned stably and readily at low cost.
摘要:
A method of measuring the inclining angle of a planar defect of a solid material with ultrasonic waves which includes the steps of irradiating ultrasonic waves incident to the planar defect of a solid material while longitudinally scanning a probe forwardly and backwardly. The inclining angle of the planar defect is determined based on the inclination of an echo envelope obtained from the relationship of the echo beam path distances of the ultrasonic waves versus the echo amplitudes or heights of the reflected waves reflected from the planar defect of the solid material. The inclining angle of the defect corresponds to a straight line portion of the echo envelope in a region where the echo height decreased gradually from a maximum height position as the echo beam path distance increases. Measurements can be made non-destructively with one probe and the inclining angle of the planar defect generated within an element or a member forming part of an electronic or mechanical apparatus can be determined accurately in an extremely efficient manner.
摘要:
A semiconductor device and a method of manufacturing the same are disclosed. The semiconductor device includes: a casing, a board and a semiconductor chip. The chip includes: an element part; a heat sink bonded to the element part; an insulting layer located on the heat sink so that the heat sink is located between the element part and the insulating layer; and a side wall insulating layer covering all of end faces of the heat sink. The semiconductor chip is located between the casing and the board, so that the insulating layer is directed to the casing to enable heat radiation from the heat sink toward the casing via the insulating layer.
摘要:
A manufacturing method of a semiconductor device includes: forming multiple trenches on a semiconductor substrate; forming a second conductive type semiconductor film in each trench to provide a first column with the substrate between two trenches and a second column with the second conductive type semiconductor film in the trench, the first and second columns alternately repeated along with a predetermined direction; thinning a second side of the substrate; and increasing an impurity concentration in a thinned second side so that a first conductive type layer is provided. The impurity concentration of the first conductive type layer is higher than the first column. The first column provides a drift layer so that a vertical type first-conductive-type channel transistor is formed.
摘要:
A manufacturing method of a semiconductor device includes: forming multiple trenches on a semiconductor substrate; forming a second conductive type semiconductor film in each trench to provide a first column with the substrate between two trenches and a second column with the second conductive type semiconductor film in the trench, the first and second columns alternately repeated along with a predetermined direction; thinning a second side of the substrate; and increasing an impurity concentration in a thinned second side so that a first conductive type layer is provided. The impurity concentration of the first conductive type layer is higher than the first column. The first column provides a drift layer so that a vertical type first-conductive-type channel transistor is formed.
摘要:
A semiconductor device and a method of manufacturing the same are disclosed. The semiconductor device includes: a casing, a board and a semiconductor chip. The chip includes: an element part; a heat sink bonded to the element part; an insulting layer located on the heat sink so that the heat sink is located between the element part and the insulating layer; and a side wall insulating layer covering all of end faces of the heat sink. The semiconductor chip is located between the casing and the board, so that the insulating layer is directed to the casing to enable heat radiation from the heat sink toward the casing via the insulating layer.
摘要:
On the surface of a semiconductor substrate there are formed a silicon oxide film, silicon nitride film and resist, whereby a groove is formed in the semiconductor substrate through an opening portion by chemical dry etching. An oxide film is formed on the inner surface of the groove by wet oxidation and, further, this oxide film is removed by wet etching, after which the surface of the semiconductor substrate located on the outer-peripheral side of the groove from an angular portion defined between a side surface of the groove and the surface of the semiconductor substrate is exposed. Then, the inner surface of the groove and the exposed surface of the semiconductor substrate are oxidized to thereby form a LOCOS oxide film, and thereafter this LOCOS oxide film is removed. As a result of this, the angular portion is made round, thereby enabling the avoidance of the concentration of an electric field on the angular portion of the groove.