Patent ID: 8445917

Claim:
A bidirectional transient voltage suppression device, comprising: a silicon carbide layer having a first conductivity type and having a first surface and a second surface opposite the first surface; and first and second silicon carbide diodes on the silicon carbide layer, wherein each of the first and second silicon carbide diodes includes a first heavily doped silicon carbide layer having a second conductivity type opposite the first conductivity type, a second heavily doped silicon carbide layer having the first conductivity type, and an ohmic contact on the first heavily doped silicon carbide layer, wherein the silicon carbide layer is electrically connected to the first and second silicon carbide diodes and provides a common reference for the first and second silicon carbide diodes, wherein the second heavily doped silicon carbide layer is between the silicon carbide layer and the first heavily doped silicon carbide layer, wherein the first and second silicon carbide diodes comprise mesas on the silicon carbide layer, and wherein the mesas include the first heavily doped silicon carbide layer and the second heavily doped silicon carbide layer.