The invention discloses a
ceramic-substrate-free
direct liquid cooling insulation packaging
power module and a preparation method thereof, and belongs to the technical field of power
semiconductor packaging. The module comprises a
semiconductor power
chip, a
metal block, a plurality of connecting
layers, a plurality of
metal structural members, an insulation sealing structure and a sealing liquid cooling device. An
electrode on the lower surface of the
chip is connected with a
metal block through a first connecting layer, the metal block is in direct contact with insulating cooling liquid, efficient heat dissipation is achieved, meanwhile, the cooling liquid serves as an insulating medium, and the electrical insulating function is ensured; electrodes on the upper surface of the
chip are respectively led out through leads and the second connecting layer; the insulation sealing structure wraps the chip and the
internal connection area, thereby further guaranteeing the insulation and sealing performance of the module. A traditional
ceramic substrate is abandoned, the structural design is combined with a
liquid cooling system, the
thermal resistance is remarkably reduced, the heat dissipation efficiency is improved, meanwhile, the problem of
insulation failure caused by bubbles is avoided, and the device is suitable for high-power-density application scenes and has the advantages of being low in cost, high in reliability, easy to expand and the like.