Patent ID: 8663485
Filing Date: 2014-03-04
Classification: C23C,C23F,H05K,Y10T

Abstract:
1. A method of manufacturing a plastic metallized three-dimensional (3D) circuit, comprising the following steps: (1) providing a plastic main body of a 3D structure; (2) performing a surface pretreatment on surfaces of the plastic main body, wherein the surface pretreatment includes surface degreasing, surface roughening, sensitization treatment and activation treatment performed in that stated order; (3) performing a metallization process, that is one of low-temperature sputtering and plastic water plating, on the pretreated surfaces of the plastic main body to deposit a thin metal film thereon; (4) performing a photoresist coating process on a surface of the thin metal film to form a photoresist protective layer thereon through any one of dip coating and spray coating; (5) performing an exposure and development process on the photoresist protective layer to form a patterned photoresist protective layer, wherein the exposure process is one of a single-sided exposure and a double-sided exposure, and includes irradiation from one of a laser light source and an ultraviolet light source directly on areas of the photoresist protective layer defined by a specific 3D exposure circuit pattern or positions of the photoresist protective layer defined by the specific 3D exposure circuit pattern, and the 3D exposure circuit pattern is a directly scanned pattern; (6) performing an etching process on parts of the thin metal film not covered by the patterned photoresist protective layer to thereby form a patterned metal circuit layer below the patterned photoresist protective layer; (7) performing a stripping process to strip the patterned photoresist protective layer off the patterned metal circuit layer; and (8) performing a surface treatment on a surface of the patterned metal circuit layer by a chemical plating process to form a metal protective layer composed of metal thereon.