Method and apparatus for compensating for high thermal expansion coefficient mismatch of a stacked device

Abstract

A process that incorporates teachings of the subject disclosure may include, for example, providing a first silicon dioxide layer on the silicon substrate, depositing a modifier layer on the first silicon dioxide layer, depositing a second silicon dioxide layer on the modifier layer to form a multilayer initial oxide and annealing the multilayer initial oxide resulting in an annealed multilayer initial oxide. The annealing causes diffusion of modifier species from the modifier layer into the first and second silicon dioxide layers and results in amorphous polysilicates. The first and second silicon dioxide layers have thicknesses that prevent the diffusion of the modifier species from reaching top and bottom interfaces of the annealed multilayer initial oxide. Other embodiments are disclosed.