Patent ID: 7987589

Claim:
A manufacturing method of a multilayer three-dimensional circuit, comprising: providing a three-dimensional insulating structure, wherein the three-dimensional insulating structure has a first three-dimensional surface inside a cavity, a bottom portion and at least one bending portion which is connected to and protrudes from the bottom portion; forming a first three-dimensional circuit structure on the first three-dimensional surface of the three-dimensional insulating structure; forming an insulating layer with a second three-dimensional surface in a solid state, wherein a shape of the second three-dimensional surface is similar to a shape of the first three-dimensional surface; placing the insulating layer in the solid state covering the first three-dimensional circuit structure, wherein the second three-dimensional surface contacts to the first three-dimensional surface, forming a second three-dimensional circuit structure on a third three-dimensional surface of the insulating layer opposite to the second three-dimensional surface the bottom portion and the at least one bending portion; and forming at least a conductive via penetrating the insulating layer to electrically connect the second three-dimensional circuit structure and the first three-dimensional circuit structure; performing an injection molding process or an inkjet rapid prototyping process to form the insulating layer a material of the insulating layer comprising an insulating material having a plurality of catalyst particles; activating a region of the third three-dimensional surface by performing a laser process, wherein the second three-dimensional circuit structure is to be formed on the region of the third three-dimensional surface; and performing a surface metallization process to form the second three-dimensional circuit structure on the region of the third three-dimensional surface.