Semiconductor substrate, electrode forming method, and solar cell fabricating method

A method for forming an electrode having a multi-layered structure on a semiconductor substrate by screen-printing by using a plurality of conductive pastes including at least silver powder, glass frit, an organic vehicle, and an organic solvent, the method comprising:

• forming a first electrode layer joined directly to the semiconductor substrate, the conductive paste of the first electrode layer containing silver;
• and
• forming an upper electrode layer constituted of at least one layer on the first electrode layer, the conductive paste of the upper electrode layer having a total silver content of 75 wt% or more and 95 wt% or less,
• wherein:
• a content of silver particles having an average particle diameter of 4 μm or greater and 8 μm or smaller with respect to the total silver content in the conductive paste of the upper electrode layer is greater than the conductive paste of the first electrode layer;
• and
• the first electrode layer and the upper electrode layer are formed to have a same footprint.