Fuji Electric Co., Ltd.

Fuji Electric Device Technology Co., Ltd.

Fuji Electric Systems Co. Ltd.

Rikihiro Maruyama

Kenshi Kai

Eiji Mochizuki

Tatsuo Nishizawa

Kazunaga Onishi

Kazuya Adachi

Mitsutoshi Sawano

Nobuyuki Kanzawa

Masafumi Horio

Masayuki Soutome

Masaoki Miyakoshi

Masahiro Kikuchi

Yoshihiro Miyazaki

Masafumi Tezuka

Masaki Takahashi

Seiichi Takahashi

Takeshi Yokoyama

Makoto Isozaki

Toshifusa Yamada

Yoshinori Uezato

Tomoaki Goto

Kousuke Komatsu

Tomio Shimizu

Souichi Okita

Takatoshi Kobayashi

Takahito Harada

Akira Nakahira

Takao Nagasawa

Wan Azha Bin Wan Mat

Katsuhiko Yoshihara

Masaaki Chino

Motokiyo Yokoyama

Tomonobu Sugiyama

A circuit pattern, which is a second negative electrode wiring, and a horizontally extending area of a circuit pattern, which is a first negative electrode wiring, are connected electrically and mechanically by a vertically extending area of the circuit pattern and wires, which are an inter-negative-electrode wiring. As a result, N terminals and N1 terminals are equal in potential in a semiconductor device. The N terminals of a converter circuit section and the N1 terminals of an inverter circuit section are electrically connected to make the N terminals and the N1 terminals equal in potential.

Semiconductor device

A semiconductor device, including a circuit pattern, a contact part and an external connection terminal. The contact part has a cylindrical through-hole and first and second opening ends opposite to each other, the second opening end being joined to the circuit pattern. The external connection terminal has a prismatic main body portion and first and second end portions, the second end portion being inserted into the through-hole from the first opening end of the contact part. The main body portion of the external connection terminal has an insertion prevented portion formed thereon. The contact part includes an insertion preventing portion formed on an inner circumferential surface of the through-hole, the insertion preventing portion being so positioned as to be substantially downstream, with respect to an insertion direction of the external connection terminal, from the main body portion of the external connection terminal inserted into the through-hole.

A semiconductor device including an insulated circuit board. The insulated circuit board includes an insulating board having an outer edge and a plurality of corners, and a plurality of circuit patterns formed on a front surface of the insulating board. The plurality of circuit patterns have a plurality of outer-edge corners facing the outer edge of the insulating board, among which outer-edge corners corresponding to the corners of the insulating board are smaller in curvature than outer-edge corners that do not correspond to the corners of the insulating board.

A method of manufacturing a semiconductor device prepares contact members, each of which has a cylindrical through-hole, and column-shaped connection terminals, each having a polygonal shape in a cross-sectional view along a length direction thereof, wherein a length of a diagonal of the polygonal shape is greater than an inner diameter of the through-holes. Chamfers with a curvature for fitting an inner surface of the through-holes are formed at corners of the connection terminal, and the connection terminals are press-fitted into the through-holes of the contacts. By doing so, the area of contact where the connection terminals press-fitted into the contacts contact the inner circumferential surfaces of the through-holes of the contacts is increased. This increases the tensile load of the connection terminals fitted into the contacts.

Semiconductor device manufacturing method and semiconductor device

A semiconductor device manufacturing method includes: applying solder to an arrangement area of a substrate, the substrate having a connection area to which a wiring member is to be directly connected, the connection area neighboring the arrangement area; arranging a component on the arrangement area via the solder; and soldering the component to the arrangement area by heating the solder while covering the connection area. A soldering support jig includes a columnar covering member having a covering surface at a bottom of the columnar covering member.

Semiconductor device manufacturing method and soldering support jig

A semiconductor device includes: a multilayer substrate which includes a circuit board and an insulating plate on which the circuit board is formed; and a contact part having a cylindrical hollow hole therein and an open end bonded to a bonding area on the front surface of the circuit board via bonding material. In the case of this semiconductor device, wettability of a contact area of the contact part with respect to the bonding material is approximately equal to wettability of at least the bonding area of the circuit board with respect to the bonding material. Thus, the rising of the bonding material into the hollow hole of the contact part during heating performed when the contact part is bonded to the circuit board is reduced.

Semiconductor device having circuit board to which contact part is bonded

A conductive plate has a front surface at a front side and a rear surface at a rear side. The front surface includes a first front surface on which a first arrangement region is disposed and a second front surface on which a second arrangement region is disposed. The first front surface has a height measured from the rear surface that is different from a height of the second front surface measured from the rear surface. Next, first and second bonding materials are respectively applied to the first and second arrangement regions. A first part is bonded to the first arrangement region via the first bonding material, and a second part is bonded to the second arrangement region via the second bonding material. The heights of the first and second arrangement regions set on the front surface on the conductive plate are different from each other.

Semiconductor device manufacturing method

A semiconductor device including an insulated circuit board on which a semiconductor chip is mounted, and a housing implemented by a plurality of side-walls including at least a first pair of facing side-walls, each of the facing side-walls having joint edges configured to be jointed with the insulated circuit board, and each of the joint edges has an arc-shape such that a center in an extending direction of the joint edge protrudes toward the insulated circuit board more than both ends of the extending direction of the joint edge.

Semiconductor device and method for manufacturing semiconductor device

A case of a semiconductor device has sidewall portions which surround sides of a metal substrate along the sides and a coating portion which covers the front surface of the metal substrate surrounded by the sidewall portions and which has through ring holes corresponding to fixing holes. Protrusions are formed on inner surfaces of the sidewall portions opposed to one another in plan view with the ring holes therebetween. The metal substrate is inserted in this way into an area surrounded by the sidewall portions of the case and is reliably fixed. Furthermore, alignment is performed with accuracy between each fixing hole of the metal substrate inserted in this way and its corresponding ring hole of the case.

Semiconductor device and semiconductor device manufacturing method

In a semiconductor device, protective films are formed on facing side surfaces of a plurality of circuit patterns and a plating process or the like is not performed on parts aside from the side surfaces where the protective films are formed. This means that when semiconductor elements and contact elements are directly bonded via solder onto the plurality of circuit patterns, a drop-in wettability of the plurality of circuit patterns for the solder is avoided.

Semiconductor device having bonding regions exposed through protective films provided on circuit patterns onto which components are soldered

A case and a semiconductor device including the case are provided for solving the following issues: when fixing a lid body to a case body by an adhesive, a process of attaching the lid body to the case body by applying the adhesive and curing the adhesive by heating is necessary, which requires much labor; also, when fixing the lid body to the case body by an engaging claw, it still requires much labor due to forming the engaging claw. The case includes a first member and a second member that is engaged with the first member to form an accommodation space inside the case, and the first member has a protruding portion extending from the first member side toward the second member side and having an end portion crushed from the opposite side of the first member to fix the second member to the first member.

Case, semiconductor device and manufacturing method of case

A mounting jig for a semiconductor device includes an insulated circuit board positioning jig having a concave part in which an insulated circuit board is placed, a tubular contact element positioning jig disposed on an upper side of the insulated circuit board and having a plurality of positioning holes at predetermined positions to insert a plurality of tubular contact elements respectively, and a tubular contact element press-down jig having a flat plate and a plurality of projections extending from a lower surface of the flat plate. The plurality of projections includes a first length from the flat plate on a side closer to an outer circumference of the insulated circuit board, and a second length from the flat plate inside the outer circumference of the insulated circuit board. The first length is shorter than the second length.

Mounting jig for semiconductor device

After a contact component is disposed in a concave joint space, when a solder solidifies, the solder thickness of the solder in the joint space is kept. Thus, a contact area between the contact component and the solder is kept, and the solder thickness of the solder that joins the contact component and a conductive pattern is kept. In addition, since an appropriate amount of the solder is kept in the joint space, an extra amount of solder does not need to be applied in advance. As a result, there is prevented creeping up of the solder into a hollow hole of the contact component, caused by the heat applied when the contact component is joined to the conductive pattern.

A semiconductor module radiator plate fabrication method includes soldering a plurality of insulating substrates of different shapes to a flat radiator plate, and forming a convex curve on an insulating substrate side of the radiator plate; obtaining a first concave curve by reversing the convex curve; setting a second concave curve on an insulating substrate side of a radiator plate after soldering, a bottom of the second concave curve being positioned under clearance between the plurality of insulating substrates; adding the first curve and the second curve to calculate a third concave curve on the insulating substrate side; and forming the third curve on a flat plate to form a radiator plate before soldering.

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Matsumoto, Japan

Rikihiro Maruyama