Patent ID: 9038463
Filing Date: 2015-05-26
Classification: B81B,B81C,G01C,Y10T

Abstract:
1. An electronic device comprising: a base body; a functional element that is placed on the base body; a lid body, formed from silicon, that is placed over the base body so as to cover the functional element; and a cavity that houses the functional element, wherein the cavity is surrounded by the base body and the lid body, wherein a hole portion and a sealing member that closes the hole portion are disposed in the lid body, wherein, in the hole portion, the area of a second opening disposed on a side opposite to a first opening is larger than the area of the first opening disposed on the base body side, and wherein a ratio of a volume of the sealing member to a volume of the hole portion is equal to or higher than 35% and is equal to or lower than 87%, wherein the hole portion includes a bottom face and communicates with the cavity through a communication hole that is disposed in a part of the bottom face, and wherein, when an opening area of the second opening of the hole portion is S