Millimeter wave module

The millimeter wave module is arranged in the transmitting direction of a millimeter wave transmitter and/or the receiving direction of a millimeter wave receiver, the millimeter wave module comprises a plurality of substrates which are vertically stacked, each substrate comprises a through hole penetrating through the substrate, and the interior of the through hole is coated with a metal electroplating material; the first layer, the second layer and the third layer are vertically and sequentially arranged, the first layer and the third layer are metal electroplating layers, the second layer is an insulating layer, and at least one of the first layer and the third layer simultaneously comprises an exposed area and a metal electroplating area surrounding the through hole; when a plurality of substrates are vertically stacked and placed, the corresponding exposed areas of every two adjacent substrates are mutually welded through ultrasonic waves. Therefore, the substrates of the formed millimeter wave module ar