Patent ID: 9287285
Filing Date: 2016-03-15
CPC Classification: H01L

Claim Text:
1. A semiconductor structure, comprising: a substrate; a first memory cell and a second memory cell formed above a side of the substrate; and a T-shape trench in the substrate between the first memory cell and the second memory cell; wherein the trench is disposed a first distance from the first memory cell and a second distance from the second memory cell, extends a depth into the substrate, and is characterized by one or more of (i) a width less than or about equal to the first distance, (ii) a width less than or about equal to the second distance, and (iii) a width less than or about equal to a sum of the first distance and the second distance, wherein the T-shape comprises a center with opposing arms and a stem extending outwardly therefrom, the arms extending away from the center in directions parallel to the side and corresponding geometrically to the first distance and the second distance, and the stem extending in a direction transverse to the side into the substrate and corresponding geometrically to the trench, whereby a T-shape results from the relative shapes and orientations of the first distance, the second distance and the trench.