Patent ID: 8309858
Filing Date: 2012-11-13
Classification: B81B,B81C

Abstract:
1. An electrical device comprising: a substrate including a functional element; an insulating first film configured to form a cavity containing the functional element, together with the substrate, and to include a plurality of through-holes, the cavity including a space between the insulating first film and the functional element; an insulating second film configured to cover the plurality of the through-holes, the second film being formed on the first film and having a gas permeability higher than that of the first film; an insulating third film configured to form at least on the second film, the third film having a gas permeability lower than that of the second film, the insulating third film being in contact with the insulating second film; and an insulating fourth film configured to form on the third film, the fourth film having an elasticity higher than that of the third film.