NOVELTY - The method involves forming a flexible metallic printed circuit board (PCB) on a patterned motherboard. An electric component is arranged in a separation section, which is identical with the motherboard. Internal stress of the metallic PCB is smaller than interface coherence, which is formed between the metallic PCB and the motherboard. Thickness of the metallic PCB is 5-500 micrometer. The motherboard is in flat board, semi-cylindrical or cylinder shape. The motherboard is made of glass, metal or polymer material.    USE - Method for manufacturing a flexible metallic PCB that is utilized in an electric component (All claimed), such as organic LED (OLED) device, solar cell, LCD, electrophoresis display (EPD) device, plasma-display panel (PDP), thin film transistor (TFT), microprocessor and RAM.    ADVANTAGE - The method enables simplifying flexible metallic PCB manufacturing process, improving quality of the PCB and reducing manufacturing cost. The electric component is formed on the separation section, which is identical with the motherboard so as to prevent surface roughness fault in the flexible metallic PCB. The method enables reducing surface roughness of the flexible metallic PCB. The method enables lowering processing temperature with 350 degree Celsius by utilizing a polymer series planarization layer so as to reduce processing time and cost. The method enables improving operation efficiency of the electric component.    DETAILED DESCRIPTION - The flexible metallic PCB is made of metal material, where metal material is iron, silver, gold, copper, Chromium, tungsten, aluminum, molybdenum, zinc, nickel, platinum, palladium, cobalt, indium, manganese, silicon, tantalum, titanium, tin, lead, vanadium, ruthenium, iridium, zirconium, rhodium, magnesium or stainless steel. An INDEPENDENT CLAIM is also included for a flexible electric component manufacturing method.    DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram illustrating a flexible metallic PCB manufacturing method.'(Drawing includes non-English language text)'