Patent ID: 8252658
Filing Date: 2012-08-28
Classification: H01L

Abstract:
1. A method of forming a plurality of diodes, comprising: forming a first mask over silicon of a semiconductor substrate, the first mask comprising first trenches formed there-through running in a first major direction over the substrate, the first mask comprising a hardmask layer; plasma etching first trenches into the silicon of the semiconductor substrate using the first mask, the plasma etching of the first trenches into the silicon comprising forming an etching plasma using precursor gases consisting of SF forming a second mask over the first trenches, the second mask comprising second trenches formed there-through running in a second major direction over the substrate which is orthogonal to the first major direction, the second mask comprising the hardmask layer of the first mask and not passing through the first trenches, the second trenches extending through the hardmask layer of the first mask; plasma etching second trenches into the silicon of the semiconductor substrate using the second mask, the plasma etching of the second trenches into the silicon comprising forming an etching plasma using precursor gases consisting of SF providing individual diodes on individual of the mesas and depositing insulative material to be received about the spaced silicon-comprising mesas.