Chip stacking and packaging structure

A chip stacking and packaging structure, comprising:

• a substrate,
• a first chip,
• a heat dissipation module, and
• a second chip;
• wherein first bonding pads and second bonding pads are arranged on a first surface of the substrate;
• wherein the first chip is stacked on the first surface of the substrate;
• first welding pins are arranged on a first surface of the first chip;
• the first welding pins one-to-one cover the first bonding pads and are one-to-one electrically connected to the first bonding pads;
• wherein the heat dissipation module is stacked on the first surface of the substrate, the heat dissipation module comprises a first groove, a cooling liquid cavity, a liquid inlet, a liquid outlet, and first conductive columns;
• the liquid inlet and the liquid outlet are respectively communicated with the cooling liquid cavity;
• the cooling liquid cavity is connected to an external cooling liquid circulation system through the liquid inlet and the liquid outlet;
• each of the first conductive columns is spaced apart from the first groove;
• each of the first conductive columns passes through the cooling liquid cavity;
• each of the first conductive columns penetrates a first surface and a second surface of the heat dissipation module;
• a bottom end of each of the first conductive columns is electrically connected with a corresponding second bonding pad of the second bonding pads arranged on the first surface of the substrate;
• an opening of the first groove is located on the second surface of the heat dissipation module;
• the first chip is embedded in the first groove from the opening;
• and a side wall and a bottom wall of the first groove extend into the cooling liquid cavity;
• wherein the second chip is stacked on the first surface of the heat dissipation module;
• second welding pins are arranged on a first surface of the second chip;
• each of the second welding pins of the second chip is electrically connected to a top end of a corresponding first conductive column of the first conductive columns;
• wherein the heat dissipation module comprises a heat dissipation pad and a heat dissipation plate;
• the heat dissipation pad is concentric-square-shaped;
• the heat dissipation plate is flat-plate-shaped;
• a height of the heat dissipation pad is matched with a height of the first chip;
• the cooling liquid cavity is defined in the heat dissipation plate;
• wherein the heat dissipation pad is fixed on the first surface of the substrate and surrounds the first chip;
• an inner side wall of the heat dissipation pad forms the side wall of the first groove;
• the heat dissipation plate is fixed above the heat dissipation pad and the first chip;
• a surface of the heat dissipation plate forms the bottom wall of the first groove;
• and each of the first conductive columns passes through the heat dissipation pad and the heat dissipation plate.