Graphitic substrates with ceramic dielectric layers

摘要

Different kinds of printing pastes or inks are utilized in various combinations to develop multiple ceramic dielectric layers on graphitic substrates in order to create effective dielectric ceramic layers that combine good adhesion to both graphitic substrates and printed copper traces, and strong insulating capability. The pastes or inks may comprise a high thermal conductivity powder.

主权项

1. A structure for electrical circuitry comprising:
electrically conducting traces; a graphitic substrate; and a plurality of layers separating the electrically conducting traces from the graphitic substrate, wherein the plurality of layers are selected from the group consisting of:
(i) a plurality of different ceramic dielectric layers,(ii) a graphitic layer and a ceramic dielectric layer, and(iii) a graphitic layer and two or more different ceramic dielectric layers, wherein the plurality of layers are a first silicon carbide layer deposited onto the graphitic substrate, a boron nitride layer deposited onto the first silicon carbide layer, and a second silicon carbide layer deposited onto the boron nitride layer, wherein the electrically conducting traces are deposited onto the second silicon carbide layer.