Patent ID: 8840795

Claim:
A method for manufacturing a master mold which is used to form a micro-patterned film applied to an exterior of a household appliance, comprising: applying photoresist to a surface of a metal substrate and UV irradiating the same through a patterned mask to transfer the pattern of the mask to the metal substrate; etching the metal substrate to which the pattern has been transferred to form a patterned metal substrate; removing the photoresist from the etched substrate; applying UV curable resin to a synthetic resin substrate; pressing the patterned metal substrate against the synthetic resin substrate coated with the UV curable resin and curing the UV curable resin, in order to replicate the pattern of the metal substrate; and separating the patterned synthetic resin substrate from the metal patterned metal substrate, wherein the pattern of the synthetic resin substrate has a pitch and width varying over its location so that the pattern may embody various colors according to a viewing angle owing to constructive and destructive interferences of light.