Patent ID: 9443756
Filing Date: 2016-09-13
CPC Classification: B44C,B81B,B81C,G02B,H01L

Claim Text:
1. A method of forming a substrate opening, comprising: forming a plurality of side-by-side openings in a substrate, at least some of immediately adjacent side-by-side openings being formed in the substrate to different depths relative one another; and removing walls that are laterally between the side-by-side openings to form a larger opening having a non-vertical sidewall surface where the walls were removed in at least one straight-line vertical cross-section that passes through the sidewall surface orthogonally to the removed walls, the non-vertical sidewall surface being formed to be straight-linear along substantially all of its length along the at least one straight-line vertical cross-section to an elevationally outermost surface of the substrate.