Thermoelectric devices, systems and methods
A method for forming a thermoelectric element for use in a thermoelectric device comprises forming a mask adjacent to a substrate. The mask can include three-dimensional structures phase-separated in a polymer matrix. The three-dimensional structures can be removed to provide a plurality of holes in the polymer matrix. The plurality of holes can expose portions of the substrate. A layer of a metallic material can be deposited adjacent to the mask and exposed portions of the substrate. The mask can then be removed. The metallic material is then exposed to an oxidizing agent and an etchant to form holes or wires in the substrate.
1. A method for forming a thermoelectric device, comprising:
(a) forming a mask adjacent to a semiconductor substrate, the mask having three-dimensional structures in a block copolymer template;
(b) removing the three-dimensional structures to expose portions of said semiconductor substrate;
(c) depositing an etching layer adjacent to exposed portions of said semiconductor substrate; and
(d) catalytically etching the semiconductor substrate with the etching layer, an oxidizing agent and an etchant.
2. The method of claim 1 , wherein, in (b), said three-dimensional structures are selectively removed from said block copolymer template.
3. The method of claim 1 , wherein the etching layer comprises a metal.
4. The method of claim 1 , wherein the three-dimensional structures are formed of a polymeric material.
5. A method for forming a thermoelectric device, comprising:
providing a block copolymer template adjacent to a semiconductor substrate, said block copolymer template having three-dimensional structures therein;
selectively removing the three-dimensional structures to provide a mask having a pattern, wherein said mask exposes portions of said semiconductor substrate; and
catalytically transferring said pattern to said semiconductor substrate.
6. The method of claim 5 , wherein said catalytically transferring said pattern to said semiconductor substrate comprises:
depositing a layer of an etching material adjacent to exposed portions of said semiconductor substrate; and
catalytically etching the semiconductor substrate with an oxidizing agent and an etchant with the aid of said etching material.
7. The method of claim 6 , wherein the etching material comprises a metal.
8. The method of claim 5 , wherein the three-dimensional structures are formed of a polymeric material.
9. A method for forming a thermoelectric device, comprising:
(a) providing, adjacent to a semiconductor substrate, a block copolymer template having three-dimensional structures distributed therein;
(b) selectively removing the three-dimensional structures, thereby providing a mask adjacent to the semiconductor substrate;
(c) depositing a layer of an etching material adjacent to the semiconductor substrate; and
(d) catalytically etching the semiconductor substrate with the aid of said etching material.
10. The method of claim 9 , wherein the layer of the etching material comprises a metal.
11. The method of claim 9 , wherein the three-dimensional structures are formed of a polymeric material.