Patent ID: 9377582
Filing Date: 2016-06-28
CPC Classification: G02B,H01L

Claim Text:
1. A method for manufacturing a substrate, the method comprising: processing a substrate material member to form a first remaining portion of the substrate material member, wherein the first remaining portion of the substrate material member has a first cavity, wherein a flat sidewall of the first cavity is oriented at a first angle with respect to at least one of a horizontal plane, a flat bottom surface of the first cavity, and a flat bottom side of the first remaining portion of the substrate material member; providing a sacrificial material member inside the first cavity; and processing the sacrificial material member when processing the first remaining portion of the substrate material member to remove the sacrificial material member and to form a second remaining portion of the substrate material member, wherein the second remaining portion of the substrate material member has a second cavity, wherein a flat sidewall of the second cavity is resulted from removal of at least the flat sidewall of the first cavity and is oriented at a second angle with respect to at least one of the horizontal plane, a flat bottom surface of the second cavity, and a flat bottom side of the second remaining portion of the substrate material member, and wherein the second angle is smaller than the first angle.