| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To control curvature of a silicon semiconductor substrate 11 in a solar battery, while maintaining BSF effects, the solar battery that has formed a back electrode layer on a non-euphotic side of the silicon semiconductor substrate whose principal ingredient is aluminum. <P>SOLUTION: A conductive paste applied to a backside 11b of a semiconductor substrate 11 contains at least aluminum powder and organic vehicle, where the difference d<SB>90</SB>-d<SB>10</SB>between a particle size d<SB>90</SB>of 90% of the aluminum powder and a particle size d<SB>10</SB>of 10% of the aluminum powder is 13μm or smaller. Such an equalization of the particle sizes of aluminum powder enables neck growth to be suppressed at calcination; and since this prevents rough and large particles from forming at an early stage of sintering, the average size of joined particles primarily constituted of aluminum on the back electrode layer 14 is made 40μm or smaller. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
