Patent ID: 11906701
Assignee: 3M INNOVATIVE PROPERTIES COMPANY
Field: Surface technology, coating (Chemistry)
Classification: CPC G  H  B  E  F  Y | IPC B  E  G  H

Claim 17:
18. A method of forming an article comprising a layer defining an anti-reflective surface, the method comprising:
forming a series of micro-structures on a surface of a layer, the series of micro-structures comprising a series of alternating micro-peaks and micro-spaces along an axis;
disposing a series of nano-sized masking elements on at least the micro-spaces along the axis, wherein the masking elements define a maximum diameter and the corresponding micro-peaks have a height of at least 10 times the maximum diameter of the masking elements; and
exposing the surface of the layer to reactive ion etching to form a plurality of nano-structures on the surface of the layer including a series of nano-peaks along the axis, each nano-peak comprising the masking element and a column between the masking element and the layer,
wherein the micro-spaces have a width of at least 50 micrometers.