Patent ID: 9671423
Date: 2017-06-06
CPC Classifications: G01P,Y10T

Claim:
1. An electronic device comprising: a substrate; a cover which has an outer cover surface and an inner cover surface, the cover being bonded to the substrate so as to form an inner space between the substrate and the cover; and a functional element which is provided in the inner space, wherein the cover includes a penetration hole which penetrates the cover from the outer cover surface to the inner cover surface, the penetration hole includes a first hole portion which is provided on an outer cover side of the cover directly adjacent to the outer cover surface, and the penetration hole includes a second hole portion which communicates with the first hole portion and which is provided on an inner cover side of the cover directly adjacent to the inner cover surface, an opening of the second hole portion on the inner cover side is smaller than an opening of the first hole portion on the outer cover side, at least a part of an inner wall surface of the second hole portion substantially forms a right angle with respect to a bottom surface of the first hole portion, wherein the penetration hole is sealed with a sealing member, and wherein glass is used as a main material of the substrate and silicon is used as a main material of the cover.