SOLAR BATTERY CELL AND METHOD FOR FABRICATING SOLAR BATTERY CELL

摘要

A rear-surface-side impurity dispersion layer (7) has a rear-surface-side high-concentration impurity dispersion layer (7a) of linear shape including a first conductive type of impurity element in a first concentration and a rear-surface-side low-concentration impurity dispersion layer (7b) in which the same conductive type of impurity element as the rear-surface-side high-concentration impurity dispersion layer (7a) is included in a second concentration that is lower than the first concentration. A rear-surface-side grid electrode (6a) has a plurality of connection protrusions (6t) protruding from the side surface of the rear-surface-side grid electrode (6a) in the direction intersecting the extending direction of the rear-surface-side grid electrode (6a) and disposed divided along the extending direction of the rear-surface-side grid electrode (6a). The protrusion lengths of the plurality of connection protrusions (6t) from the side surface of the rear-surface-side grid electrode (6a) in incrementally greater distances from a specific reference position on one surface side of a semiconductor substrate are longer in the extending direction of the rear-surface-side grid electrode (6a).