Patent ID: 8759952
Filing Date: 2014-06-24
Classification: H01L

Abstract:
1. A device comprising: a semiconductor substrate; an initial layer comprising a first silicon oxide over the semiconductor substrate, wherein the first silicon oxide is an oxygen-rich oxide having a first oxygen-to-silicon atomic ratio, with the first oxygen-to-silicon atomic ratio being the ratio of the number of oxygen atoms in the first silicon oxide to the number of silicon atoms in the first silicon oxide; a buffer layer comprising a second silicon oxide over and contacting the initial layer, wherein the second silicon oxide has a second oxygen-to-silicon atomic ratio, with the second oxygen-to-silicon atomic ratio being the ratio of the number of oxygen atoms in the second silicon oxide to the number of silicon atoms in the second silicon oxide, and wherein a ratio of the first oxygen-to-silicon atomic ratio to the second oxygen-to-silicon atomic ratio is greater than about 8; and a silicate glass layer over the initial layer.