Flexible circuit board incorporating sunken resistor and method for manufacturing same

A method for manufacturing a flexible circuit board with buried resistor comprising:

• providing a composite board, the composite board comprising a supporting substrate, a physical development core layer formed on the supporting substrate, and a silver halide emulsion layer formed on the physical development core layer;
• exposing portion of the silver halide emulsion layer;
• the unexposed silver halide emulsion layer being develop in a developing solution, silver halide in the unexposed silver halide emulsion layer is able to form a silver complex with the developing solution and dissolve the silver halide emulsion layer, and the silver complex diffuses to the physical development core layer, the silver complex is catalyzed by the physical development core in the physical development core layer and occurs a redox reaction, and silver particles deposit on the supporting substrate to form a silver layer;
• washing the physical development core layer on the supporting substrate to retain the silver layer on the supporting substrate;
• forming a conductive layer on the silver layer;
• and
• etching the conductive layer to form at least one opening, the opening exposes portion of the silver layer to form a buried resistor.