Semiconductor device having low floating inductance
First Claim
1. A semiconductor device for controlling an input current flowing to a semiconductor chip to provide an output current comprising:
- (a) a metal base plate having a major surface;
(b) a first insulating substrate disposed on said major surface of said metal base plate;
(c) a first conductive layer disposed on said first insulating substrate and having a first portion for conducting one of an input current and an output current in a first direction parallel to said major surface;
(d) a second insulating substrate disposed on part of said first conductive layer;
(e) a second conductive layer disposed on said second insulating substrate and having a second portion for conducting the other of the input an output currents in a second direction antiparallel to said first direction, said second portion overlying said first portion; and
(f) a semiconductor chip disposed on one of said first and second conductive layers and electrically connected to said first and second conductive layers.
1 Assignment
0 Petitions
Accused Products
Abstract
A first composite substrate including an insulating substrate, a copper pattern, and a copper layer on opposite surfaces is mounted on a metal base plate. A second composite substrate and semiconductor chips are mounted on the first composite substrate and interconnected by wire bonding. The paths of current flowing in the wires and in a copper pattern of the second composite substrate are antiparallel to the paths of current flowing in respective corresponding portions of the first composite substrate. A semiconductor device is produced in which an increasing switching frequency does not increase a surge voltage generated in ON and OFF switching operations.
32 Citations
22 Claims
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1. A semiconductor device for controlling an input current flowing to a semiconductor chip to provide an output current comprising:
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(a) a metal base plate having a major surface; (b) a first insulating substrate disposed on said major surface of said metal base plate; (c) a first conductive layer disposed on said first insulating substrate and having a first portion for conducting one of an input current and an output current in a first direction parallel to said major surface; (d) a second insulating substrate disposed on part of said first conductive layer; (e) a second conductive layer disposed on said second insulating substrate and having a second portion for conducting the other of the input an output currents in a second direction antiparallel to said first direction, said second portion overlying said first portion; and (f) a semiconductor chip disposed on one of said first and second conductive layers and electrically connected to said first and second conductive layers. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A semiconductor device for controlling an input current flowing to a semiconductor chip to provide an output current comprising:
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(a) a metal base plate having a major surface; (b) a first insulating substrate disposed on said major surface of said metal base plate; (c) a first conductive layer provided on said first insulating substrate and having a first region for conducting one of an input current and an output current in a first direction parallel to said major surface, and a second peninsular region continuous with said first region and protruding in a second direction different from said first direction on said major surface; (d) a second insulating substrate provided on said first region; (e) a second conductive layer provided on said second insulating substrate and having a portion for conducting the other of the input and output in a third direction antiparallel to said first direction, said portion overlying said first region of said first conductive layer; and (f) at least one semiconductor chip provided on said second region and electrically connected to said first and second conductive layers. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A semiconductor device for controlling an input current flowing to a semiconductor chip to provide an output current, comprising:
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(a) a metal base plate having a major surface; (b) an insulating substrate disposed on said major surface of said metal base plate; (c) a conductive layer provided on said insulating substrate for conducting on of an input current and output current in a first direction parallel to said major surface; (d) a semiconductor chip disposed on said conductive layer; and (e) a wire electrically connected to an upper surface of said semiconductor chip and extending above said conductive layer in a second direction antiparallel to said first direction for conducting the other of the input and output currents. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification