Patent ID: 9006830
Filing Date: 2015-04-14
Classification: H01L

Abstract:
1. A semiconductor device, comprising: an NMOS transistor formed under a pad, a first lower metal film formed on the drain, for establishing an electrical connection to the drain; a second lower metal film for electrically connecting the source and the gate electrode to the P-type diffusion region; an intermediate metal film electrically connected to the first lower metal film through a first via, the intermediate metal film having a rectangular ring shape and including an opening under the pad; an upper metal film that forms the pad, the upper metal film being formed on the intermediate metal film and electrically connected to the intermediate metal film through a second via; and a protective film including a pad opening that is aligned with the opening, the first vias being formed only on one side of the intermediate metal film and on another side thereof opposed to the one side, the diffusion region for the source and the diffusion region for the drain being formed symmetrically about a straight line in a channel width direction of the NMOS transistor.