Patent ID: 8084314
Filing Date: 2011-12-27
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, the method including: a step of forming a first insulation film on a semiconductor substrate; a step of forming a high resistance element made of polysilicon on the first insulation film; a step of forming a second insulation film on the high resistance element; and a step of forming a hydrogen diffusion preventing film from a material having a hydrogen diffusion coefficient smaller than a hydrogen diffusion coefficient of the second insulation film on the second insulation film, wherein: the hydrogen diffusion preventing film is formed so as to cover a part of the high resistance element, the hydrogen diffusion preventing film comprises a plurality of hydrogen diffusion preventing films, the hydrogen diffusion preventing films are provided in parallel on the second insulation film with an equal interval therebetween, and the hydrogen diffusion preventing film is provided orthogonal to the high resistance element.