A power module with an electrode covered with an insulating layer

Abstract

The invention discloses a power module with an electrode covered with an insulating layer, which includes a DBC, an output electrode and a plurality of power electrodes. The part is connected to the welding leg through the connecting part, and the welding leg is connected to the DBC. At least one power supply electrode is provided with an insulating layer on the surface, and the insulating layer is provided on the surface of the main part and the connecting part. The present invention arranges an insulating layer on the electrode surface of the power module, even if the chip explodes, it is not easy to conduct any two of the electrodes to cause dangerous situations such as electrode arcing and module burning, thereby improving the safety of the module.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to a power module with electrodes covered with insulating layers. Background technique [0002] The power module is a power switch module packaged by power electronic devices such as MOS transistors (metal oxide semiconductors), IGBTs (insulated gate field effect transistors), and FRDs (fast recovery diodes) according to certain functions. Power conversion in various occasions such as automobiles, photovoltaic power generation, wind power generation, and industrial frequency conversion. [0003] In some existing power modules, the distance between multiple power supply electrodes is very close. Take the three-level power module as an example, such as figure 1 As shown, it is an existing power module, including DBC (Direct Bonding Copper, insulated copper clad substrate) 1, output electrode 2, intermediate electrode 3, positive electrode 4 and negative electrode 5, and intermediate ...

AI Technical Summary

Problems solved by technology

During the use of the module, the chip may explode due to some reasons, and the explosion will produce a large amount of conductive gas. There is no insulation protection between the positive electrode, negative electrode and the intermediate electrode. When the conductive gas generated by the explosion is conducted When any two electrodes are used, electrode arcing and burning will occur, which will cause losses and even danger to the whole system where the module is installed.

Images