Deposited thin film void-column network materials
First Claim
1. A nano-scale composition comprising:
- a) a plurality of polycrystalline or amorphous rod-like structure units penetrating a continuous void, and b) a substrate to which said plurality of rod-like structure units are uniformly orientated and adhered.
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Abstract
A novel porous film is disclosed comprising a network of silicon columns in a continuous void which may be fabricated using high density plasma deposition at low temperatures, i.e., less than about 250° C. This silicon film is a two-dimensional nano-sized array of rodlike columns. This void-column morphology can be controlled with deposition conditions and the porosity can be varied up to 90%. The simultaneous use of low temperature deposition and etching in the plasma approach utilized, allows for the unique opportunity of obtaining columnar structure, a continuous void, and polycrystalline column composition at the same time. Unique devices may be fabricated using this porous continuous film by plasma deposition of this film on a glass, metal foil, insulator or plastic substrates.
179 Citations
53 Claims
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1. A nano-scale composition comprising:
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a) a plurality of polycrystalline or amorphous rod-like structure units penetrating a continuous void, and b) a substrate to which said plurality of rod-like structure units are uniformly orientated and adhered. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 47, 48, 49, 50, 51, 52)
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31. A composite structure which comprises:
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a substrate; and
a porous film comprising a plurality of polycrystalline or amorphous rod-like units extending therefrom into a void having a porosity of up to 90%. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 53)
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42. A sensor which comprises a composite structure having:
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a substrate; and
a porous film comprising a plurality of polycrystalline or amorphous rod-like units extending therefrom into a void having a porosity of up to 90%. - View Dependent Claims (43)
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44. A gas detector which comprises a composite structure having:
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a substrate; and
a porous film comprising a plurality of polycrystalline or amorphous rod-like units extending therefrom into a void having a porosity of up to 90%.
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45. An analytical device which comprises a composite structure having:
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a substrate; and
a porous film comprising a plurality of polycrystalline or amorphous rod-like units extending therefrom into a void having a porosity of up to 90%. - View Dependent Claims (46)
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Specification