Patent ID: 8633393

Claim:
A Printed Circuit Board (PCB), comprising: a first board material, a second board material, and a third board material sequentially pressed together, wherein the first board material, the second board material, and the third board material are provided with an opening respectively; at least two of the openings have different sizes, wherein, the openings are used for accommodating a heat-dissipation metal block, a surface of the heat-dissipation metal block is solder with a soldering surface of at least one of the first board material, the second board material, and the third board material, wherein, in the first board material the second board material and the third board material, corresponding two openings of at least two of the first board material the second board material and the third board material form a step-shaped region, and the board material in a region between boundaries of the two openings forming the step-shaped region is provided with a soldering surface on one surface thereof close to a larger opening of the two openings and the soldering surface is configured to solder a corresponding region of a partially-sintered heat-dissipation metal block, wherein, the first board material is a high-frequency PCB material, the second board material is a prepreg, and the third board material is a low-frequency PCB material, and each of the first board material, the second board material and the third board material comprises at least one layer.