Electronic half bridge module

A half bridge rectifying module for use in an internal combustion engine starting/alternator circuit, the module comprising:

• a thermally conductive base;
• a plurality of lower circuit boards, each of the plurality of lower circuit boards being adjacently positioned within the thermally conductive base along a same plane;
• at least one MOSFET semiconductor device having a first surface, the first surface of the at least one MOSFET semiconductor device being mounted to one of the plurality of lower circuit boards;
• a common terminal, the common terminal having a planar portion, the planar portion being in electrical contact with each of the plurality of lower circuit boards to electrically connect the same;
• an electrical contact member;
• and
• an upper circuit board including a connector providing external access for drive signals for the at least one MOSFET semiconductor device, the electrical contact member connecting the connector with at least one of the plurality of lower circuit boards.

A rectifying module, comprising:

• a thermally conductive base;
• a lower circuit board positioned within the thermally conductive base;
• at least one MOSFET semiconductor device having:
• a first surface, the first surface of the at least one MOSFET semiconductor device being a drain surface mounted to the lower circuit board;
• a second surface, the second surface being opposite the first surface and being coupled to the lower circuit board by at least one “S”-shaped wire bond, an attachment point on the lower circuit board being angularly displaced from an attachment point on the second surface;
• a common terminal, the common terminal having a planar portion, the planar portion being in electrical contact with the lower circuit board;
• a plurality of voltage terminals, each of the plurality of voltage terminals being coupled to the lower circuit board and extending at different distances therefrom;
• an electrical contact member;
• and
• an upper circuit board, including a connector providing external access for drive signals for the at least one MOSFET semiconductor device, the electrical contact member connecting the connector with the lower circuit board.

A module having a reduced inductance comprising:

• a first circuit board and a second circuit board each having defined on an electrically conductive layer thereof a common source bus for electrical connection to a source region of at least one power semiconductor device, a common drain bus for electrical connection to a drain region of said at least one power semiconductor device, and a gate connection pad for electrical connection to a gate region of the at least one semiconductor device;
• a negative terminal in electrical contact with the first circuit board;
• and
• a positive terminal in electrical contact with the second circuit board;
• wherein the positive terminal and the negative terminal are positioned close to one another to reduce the inductance of the module.

A rectifying module comprising:

• at least one circuit board having defined on an electrically conductive layer thereof,
• a common drain bus, the common drain bus including at least two substantially parallel spaced apart portions for electrical connection with a drain region of a semiconductor power device, the parallel portion being integral with a contact portion for making electrical contact with a terminal;
• a common source bus substantially parallel to the parallel portions of the common drain bus and disposed therebetween for connecting to a source region of a semiconductor device, the common source bus including a contact portion for making electrical contact with another terminal;
• and
• at least one gate pad for making electrical connection with a gate region of a semiconductor device, the gate pad being disposed near one of the parallel portions of the common drain bus.