The invention discloses a high-thermal-
conductivity PCB three-dimensional heat dissipation channel preparation method, device and equipment. The method comprises the following steps: selecting a high-thermal-
conductivity FR-4 base material containing nano aluminum
oxide particles, and carrying out
cutting and
plasma cleaning on the high-thermal-
conductivity FR-4 base material; delimiting a heat dissipation reference layer in the middle layer of the PCB, forming a groove in a projection area, corresponding to a surface heating device, of the heat dissipation reference layer, and
processing a groove wall; a main heat conduction hole array penetrating through the
surface layer to the heat dissipation reference layer and auxiliary heat conduction holes connecting the heat dissipation reference layer and the bottom layer are machined through a
laser drilling
machine; a gradient
metal coating is formed through chemical
copper deposition,
copper electroplating and local silver
electroplating in sequence; an
oxygen-free
copper insert is embedded into the groove of the heat dissipation reference layer and is fixed through a heat conduction silver
adhesive; a wiring layer is manufactured and pressed, wherein after line
etching and
solder mask layer
processing are completed, all the
layers are combined in a
hot pressing mode; and post-treatment and detection: carrying out surface gold immersion and heat dissipation performance detection. By means of the mode, the purposes of constructing an efficient penetrating type heat dissipation network and preparing the PCB with the heat dissipation performance and wiring compatibility considered can be achieved.