Solar cell apparatus, production method of the same, metal plate for the same, and power generating plant

A process for producing a solar cell apparatus comprising the steps of:

• forming projections on one surface of a metal substrate;
• forming a ceramics layer and a glass layer successively on said one surface;
• forming two silicon layers on a surface of the glass layer;
• forming a glass layer on the surface of the silicon layers;
• forming a predetermined cut into the silicon layers through the glass layer;
• forming a plurality of through-holes in the glass layer on the silicon layers so that the through-holes come in contact with an upper silicon layer of the silicon layers;
• forming an electrode in the through-hole;
• forming an antireflection film on the glass layer on the silicon layers;
• and forming external terminals on the electrode and on the other surface of the metal substrate.

A process for producing a solar cell apparatus comprising the steps of:

• forming two silicon layers on one surface of a metal substrate;
• forming a photosensitive polymer layer on the silicon layers and partially curing the polymer in a predetermined planar form;
• removing the partially cured part of the photosensitive polymer;
• removing, by etching, a part of the two silicon layers below the removed part of the photosensitive polymer, to form a through-hole which reaches a surface of the metal plate;
• filling an insulating material in the removed part of the silicon layers so that the insulating material reach a part of an upper silicon layer of the silicon layers removed by etching;
• forming an electrode on the insulating material;
• and forming external terminals on the electrode and on the other surface of the metal plate.