The invention relates to an ultra-thick
copper circuit board and a manufacturing method thereof. The manufacturing method comprises the following steps: (1)
etching partial thickness of a non-circuit-pattern area
copper plate on one side of the
copper plate by adopting an
etching process to form a groove, and carrying out the lamination step on the side by virtue of a binding layer; (2) drilling, metalizing the hole,
etching the rest thickness of the non-circuit-pattern area copper plate on the other side of the copper plate by adopting the etching process to obtain a circuit pattern; (3) carrying out the printing resistance
soldering steps: printing resin onto the non-circuit-pattern area,
drying, and then
printing ink onto the entire circuit board; and (4) carrying out the subsequent procedures. By adopting the method, the copper plate of 80Z or more is realized, and the blank that a multilayer ultra-thick copper circuit board cannot be manufactured in the industry is filled; moreover, the manufacturing method is simple, the manufacturing method can be realized by adopting a circuit board conventional device, and the manufactured ultra-thick copper circuit board is good in yield and reliable in performance.