Patent ID: 8895415

Claim:
A method of preparing a stack structure for an electronic device on a semiconductor substrate, the method comprising: (a) depositing a doped silicon layer on the substrate by introducing a first process gas comprising a silicon hydride and a dopant precursor into a chemical vapor deposition (CVD) apparatus having a plasma, wherein the substrate is held at a temperature of about 450° C. to 550° C., the silicon hydride in the first process gas is introduced at a flow rate of at least about 0.01 sccm/cm 2 of substrate deposition surface area, and the doped silicon layer has a compressive stress of less than about 100 MPa or a tensile stress, and a thickness of less than about 500 Å; (b) depositing a dielectric layer on the substrate by introducing a second process gas comprising a precursor of the dielectric layer into the CVD apparatus having a plasma, wherein the dielectric layer has a compressive stress of at least about 200 MPa and a thickness of less than about 500 Å; and (c) repeating operations (a) and (b) for two or more times to form a stack structure.