Patent ID: 9682858
Date: 2017-06-20
CPC Classifications: B81C,G01L,H01L

Claim:
1. An electronic device comprising: a substrate; a functional element that is disposed in a surface side of the substrate; a wall portion that is disposed on the one surface side of the substrate so as to surround the functional element in a plan view of the substrate; and a ceiling portion that is disposed on an opposite side to the substrate with respect to the wall portion and forms an internal space along with the wall portion, wherein the wall portion includes an insulating layer, and a plurality of etching resistant layers having higher resistance to an etchant than the insulating layer, wherein the plurality of etching resistant layers are coupled to each other and are disposed around the insulating layer in a sectional view in a direction intersecting the substrate, and wherein the plurality of etching resistant layers include a first etching resistant layer that includes