Patent ID: 9437562
Filing Date: 2016-09-06
CPC Classification: H01L

Claim Text:
1. A manufacturing method of a semiconductor device, comprising: placing a mask having an opening on an external region of a top face of a substrate to locate an end portion of the opening of the mask just above a concave portion formed on the top face of the substrate, the external region being located outside the concave portion; growing a conductive film on part of the top face of the substrate through the mask after the mask is placed on the substrate, the part of the top face containing the concave portion; and removing the mask from the substrate after the conductive film is grown, wherein the concave portion is a groove continuously surrounding an internal region of the top face of the substrate, the internal region being located inside the concave portion, and a width of the groove is equal to or more than a sum of a manufacturing error of an opening width of the mask in a width direction of the groove and two times a placing position error of the mask in the width direction of the groove.