Patent ID: 11927619
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. Power semi-conductor module comprising:
at least one Insulated Gate Bipolar Transistor IGBT with a Gate G forming a first electrode and an Emitter E forming a second electrode, or
at least one Metal-Oxide-Semiconductor Field-Effect Transistor MOSFET with a Gate G forming a first electrode and a Source S forming a second electrode;
said first electrode including a polysilicon material made in one piece,
said one-piece being made partly of a monitoring portion,
said monitoring portion including said polysilicon material and being in electrical contact with the second electrode such that a leakage current flows between the first electrode and the second electrode in an operational state of the module;
said monitoring portion having a location, a form, a size and a material composition selected together such that to have a variable resistance in function of its temperature during said operational state of said module,
characterized in that the monitoring portion comprises at least one of the following:
a polysilicon layer covering continuously at least a trench of the first electrode and a dummy trench of the second electrode;
an extension part of the second electrode disposed between a polysilicon material element of the first electrode and a polysilicon material element of the second electrode in such a way to ensure an electric link between said two electrodes.