Patent ID: 9324534
Filing Date: 2016-04-26
CPC Classification: B82Y,C25F,H01J,Y10S

Claim Text:
1. A method of forming a monolithic, homogeneous, and porous silicon carbide field emitter having a plurality of discrete emission projections extending from a face of the field emitter, the method comprising: providing a silicon carbide substrate; providing an anodizing solution including (i) at least one reducing agent, (ii) at least one oxidizer, and (iii) water; electrochemically etching either face of the silicon carbide substrate with the anodizing solution for an effective period of time to thereby form a porous silicon carbide substrate; subjecting the face of the porous silicon carbide substrate to ion etching to thereby form a silicon carbide field emitter having a plurality of discrete emission projections of porous silicon carbide extending from the face of the field emitter.