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US 10,570,659 B2Granted
Method of making electro-optic window by sputtering material to fill channels of a grid
AssigneeBAE SYSTEMS plc
InventorsSajad Haq, Hazel Anne Dyke, Michael Dunleavy, Harry John Finn
Life of this patent
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Abstract
An electro-optic window is provided, together with a method of manufacturing the window. The window (3) is made of a material substantially transparent to at least one of infra-red, visible and UV radiation and treated to have reduced RF/MICROWAVE transmission characteristics by the provision of a grid (1) set into at least one surface (2) thereof. The grid (1) is formed of a material selected to be either reflective or absorptive to RF/MICROWAVE radiation.
Claims6
A method of making an electro-optic window having reduced RF and microwave transmission characteristics, the method comprising:
- providing a window that is formed from a material that is substantially transparent to at least one of infra-red, visible and UV radiation;
- forming on a surface of the window a grid of channels;
- sputtering over the surface of the window a layer of a material having one of electrically conductive and dielectric properties to substantially fill the channels of the grid;
- selectively etching the surface of the window, thereby removing the sputtered material from the surface while leaving the channels of the grid substantially filled with the material, creating a corresponding grid pattern of the material within the channels, and thereby rendering the window non transmissive to RF/MICROWAVE radiation;
- and
- treating the material as required to render the grid usable to reduce the RF/MICROWAVE transmission characteristics of the window.
3 more elements
Dependencies are inferred from the claim text.