Patent ID: 11955344
Assignee: YANGTZE MEMORY TECHNOLOGIES CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of controlling bow of a substrate, comprising:
providing a substrates;
depositing a dielectric layer which includes one of high density plasma (HDP) silicon oxide material and tetraethyl orthosilicate (TEOS) material over the substrate, the substrate having a downward bow with respect to a reference plane and a value of the bow being negative after the one of the HDP silicon oxide material and the TEOS material is deposited on the substrate; and
adjusting the bow of the substrate by performing an annealing process on the substrate, wherein:
the annealing process includes one of a first process condition and a second process condition, the first process condition inducing a tensile stress on the substrate to cause the substrate to bow upward with respect to the reference plane, and the second process condition inducing a compressive stress on the substrate to cause the substrate to bow downward with respect to the reference plane.