Patent ID: 9196775
Filing Date: 2015-11-24
Classification: H01L,Y02E

Abstract:
1. A solar battery cell comprising: a light-receiving-surface lead bonding electrode on a light receiving surface of a semiconductor substrate that receives sunlight to generate power; and rear-surface lead bonding electrodes on a rear surface of the semiconductor substrate, wherein in the solar battery cell, a light-receiving surface lead and a rear surface lead are connected to the light-receiving-surface lead bonding electrode and the rear-surface lead bonding electrode, respectively, and generated power is extracted, and wherein the rear-surface lead extends linearly on a rear surface of the semiconductor substrate, and a plurality of the rear-surface lead bonding electrodes being separated from each other and having same sizes are formed in a dot shape with a predetermined gap therebetween in a single line along the rear surface lead, and pitches among the rear-surface lead bonding electrodes are set so that each pitch in opposite endmost parts of the semiconductor substrate is smaller than every pitch between the opposite endmost parts of the semiconductor substrate, wherein the pitches among the rear-surface lead bonding electrodes are largest in a central part of the semiconductor substrate, decrease towards the opposite endmost parts of the semiconductor substrate, and become smallest at the opposite endmost parts of the semiconductor substrate, and a relation of pitches among the rear-surface lead bonding electrodes is represented as A≧C>B, when a pitch in a central part of the semiconductor substrate is designated as A, a pitch in one of the opposite endmost parts of the semiconductor substrate is designated as B, and a pitch in an intermediate part between the central part and one of the opposite endmost parts of the semiconductor substrate is designated as C wherein the relation of the pitches among the rear-surface lead bonding electrodes is represented as A=C, and as A:B=2:1.