Patent ID: 7540931

Claim:
A method of producing a ceramic green sheet utilizing an exposure process and a development process, comprising the steps of: attaching a first photosensitive material containing a powder that has a specific electric characteristic on a surface of a base member that can transmit light used in said exposure process, said first photosensitive material having sensitivity to said light; irradiating said first photosensitive material with said light from the backside of said base member to perform said exposure process with such an exposure dose that said first photosensitive material is exposed up to a first predetermined thickness from said base member; performing said development process on said first photosensitive material after said exposure process, forming a light blocking portion composed of a member that does not transmit the light used in said exposure process on a surface of said first photosensitive material after said development process; attaching a second photosensitive material containing a powder that has a specific electric characteristic on a surface of said light blocking portion and said first photosensitive material after said development process, said second photosensitive material having sensitivity to said light; irradiating said second photosensitive material with said light from the backside of said base member to perform said exposure process with such an exposure dose that said second photosensitive material is exposed up to a second predetermined thickness from the surface of said first photosensitive material; and performing said development process on said second photosensitive material after said exposure process.