Patent ID: 9150420
Filing Date: 2015-10-06
Classification: C01B,C25B,Y02E

Abstract:
1. An electrode comprising carbon having a specific thermal conductivity from 20 to 200 W/(m*K), said electrode comprising: a main body having a cross-section defining a base surface of the electrode; and a conical or pyramidal tip comprising a device having a cavity adapted to receive a filament rod adapted to grow in size, the conical or pyramidal tip including a top and a base radially outside and longitudinally below the top, wherein the conical or pyramidal tip is surrounded by at least one raised edge radially outside and longitudinally above the base of the conical or pyramidal tip, wherein the raised edge is adapted to avoid collapse of the electrode during a deposition process whereby the filament rod grows in a deposition reactor due to sol silicon deposition on the filament rod, wherein the electrode comprises a plurality of zones of different materials with different specific thermal conductivities, the specific thermal conductivities of materials increasing from the inside outward, and wherein at least one inner zone is a loose or replaceable insert.