Patent ID: 8501020

Claim:
A method for making a three-dimensional nano-structure array, the method comprising: providing a substrate; hydrophilicly treating the substrate; forming a monolayer nanosphere array on the substrate, wherein the monolayer nanosphere array comprises a plurality of nanospheres; placing the substrate with the monolayer nanosphere array thereon a reactive atmosphere, wherein the reactive atmosphere is produced by a microwave plasma system, the reactive atmosphere comprises chlorine gas, argon gas, and oxygen gas, an input rate of the chlorine gas is in a range from about 10 standard cubic centimeters per minute to about 60 standard cubic centimeters per minute, an input rate of the argon gas is in a range from about 4 standard cubic centimeters per minute to about 20 standard cubic centimeters per minute, and an input rate of the oxygen gas is in a range from about 4 standard cubic centimeters per minute to about 20 standard cubic centimeters per minute, a power of the plasma system is in a range from about 40 Watts to about 70 Watts, a working pressure of the reactive atmosphere is in a range from about 2 Pa to about 10 Pa, a tailoring and etching time in the reactive atmosphere is in a range from about 1 minute to about 2.5 minutes, and a ratio between a power of the plasma system and a working pressure of the reactive atmosphere is less than 20:1, thereby obtaining a plurality of stepped cylindrical bulges, each cylindrical bulge comprises a first cylinder and a second cylinder located on the first cylinder, a diameter of the first cylinder is greater than a diameter of the second cylinder; and removing the monolayer nanosphere array.