Source: http://www.google.com/patents/US8158458?dq=6106459
Timestamp: 2016-09-28 06:01:49
Document Index: 104275999

Matched Legal Cases: ['Application No. 200510102711', 'Application No. 200910140303', 'Application No. 2005101027110', 'Application No. 2004', 'Application No. 200910140303', 'Application No. 10']

Patent US8158458 - Power semiconductor module and method of manufacturing the same - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA power semiconductor module and a method of manufacture thereof includes lead a frame carrying lead having inner and outer lead portions. The outer lead portions, which are connected by soldering to semiconductor chips simultaneously, eliminate the need for using bonding wires. Since no bonding wire...http://www.google.com/patents/US8158458?utm_source=gb-gplus-sharePatent US8158458 - Power semiconductor module and method of manufacturing the sameAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS8158458 B2Publication typeGrantApplication numberUS 12/576,742Publication dateApr 17, 2012Priority dateSep 22, 2004Fee statusPaidAlso published asCN1753177A, CN101609826A, CN101609826B, DE102005040058A1, US7723846, US20060060982, US20100055845Publication number12576742, 576742, US 8158458 B2, US 8158458B2, US-B2-8158458, US8158458 B2, US8158458B2InventorsOsamu Ikawa, Eiji Mochizuki, Masayuki Soutome, Norio ArikawaOriginal AssigneeFuji Electric Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (28), Non-Patent Citations (6), Referenced by (2), Classifications (15), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetPower semiconductor module and method of manufacturing the same
US 8158458 B2Abstract
A power semiconductor module and a method of manufacture thereof includes lead a frame carrying lead having inner and outer lead portions. The outer lead portions, which are connected by soldering to semiconductor chips simultaneously, eliminate the need for using bonding wires. Since no bonding wire is used for connecting the leads and the semiconductor chips, a sufficient current capacity is obtained. The bonding between an insulating circuit board and the semiconductor chips and the bonding between the semiconductor chips and the leads can be made simultaneously in a single step of reflow-soldering. As a result, the mounting time can be shortened and the power semiconductor module can be manufactured more efficiently.
This is a divisional of and claims priority from U.S. patent application Ser. No. 11/224,720 filed Sep. 12, 2005, the content of which is incorporated herein by reference.
Power semiconductor modules are used in inverters, uninterruptive power supplies, machine tools, industrial robots, and such apparatuses in the form of packages, independent from these industrial apparatuses. Such a power semiconductor module houses therein one or more semiconductor chips insulated gate bipolar transistors (hereinafter referred to as “IGBTs”) and such power semiconductor devices constituting the power converter circuit. The power semiconductor module is mounted on a predetermined control circuit board for controlling any of the apparatuses described above. See for instance JP 2002-50722 A.
The present invention relates to a power semiconductor module that houses therein one or more semiconductor chips mounting power semiconductor devices thereon, and a method of manufacturing the same.
FIG. 1 schematically illustrates a perspective view of the external appearance of a first embodiment of a power semiconductor module according to the present invention.
Referring to the drawings, the present power semiconductor module is described in connection with controlling an inverter. In the following descriptions, the vertical positional relations are described sometimes with reference to the orientation of the power semiconductor module shown in FIG. 1.
A fastener insertion holder 21 for inserting a screw or fastener described later is disposed at a position of the fastener mounting plate 4 spaced part from the main body 11 of the terminal casing 2. A fastener insertion hole 22 is bored vertically in the central part of the fastener insertion holder 21. A circular boss 23 is arranged on the bottom face of the fastener mounting plate 4 such that the circular boss 23 is protruding from the bottom surface of the fastener mounting plate 4. The fastener insertion hole 22 is formed through the center of the protruding circular boss 23. The distal end face of the circular boss 23 works as a contact plane contacting with a cooling fin described later. A U-shaped cutout 24 is formed between the fastener insertion holder 21 and the main body 11 of the terminal casing 2 such that the portion of the fastener mounting plate 4 left below the cutout 24 between the fastener insertion holder 21 and the main body 11 of the terminal casing 2 (hereinafter referred to as the “bottom of the cutout 24”) is thin. A long slit 25 extending in the width direction of terminal casing 2 is formed in the central part of the bottom of the cutout 24 to raise the flexibility thereof.
Then, the lead frame 9 can be set in a predetermined die and the terminal casing 2 incorporating the lead frame 9 therein as shown in FIG. 9(A) can be formed by injection molding of a polyphenylene sulfide resin (hereinafter referred to as a “PPS resin”) (step S22). Protrusions 14 and the step 12 shown in FIG. 3(C) can be formed on the terminal casing 2 by injection molding. The fastener mounting plates 4 also can be formed by injection molding such that the fastener mounting plates 4 are integrated into the terminal casing. In this state, the lead frame 9 still remains flat as shown in FIG. 9(B). For improving the adhesiveness of the PPS resin to the epoxy resin, a predetermined amount of a phenoxy resin or an ester may be added to the PPS resin.
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