| 摘要 |
A nano pattern structure, a multi-layer optical sheet having the structure, and a backlight unit are provided to facilitate manufacturing work, to reduce the manufacturing cost, and to improve durability of the pattern by inserting a metal pattern under the surface of a substrate. A nano pattern structure is composed of first grooves(17) formed on a molding member(16) at regular intervals and an element(18) formed in the first groove made of one of aluminum, gold, silver, chrome, organic compounds, inorganic compounds, and magnetic materials. A nano pattern formed by the element is shaped like a grid. The molding member is made of one of metal, polymer, and ceramic. The section of the grid is formed to have a polygon, a circle, or an oval shape.
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