| 摘要 |
PURPOSE:To enable the formation of a uniform Al layer and a P<+> layer without cohesion or cracks by a method wherein one main surface of a P type Si substrate is coated with a paste of substance mainly made of scalelike Al powder, which is then calcined. CONSTITUTION:In the case of forming the same conductivity type impurity layer 3 and an electrode 5 on one main surface of the P type Si substrate 1, a paste of substance mainly made of scalelike Al powder is applied and then calcined. For example, a material with an N<+> layer formed on the front of the substrate 1 by ion implanted is used as a junction-forming Si substrate for a solar cell. A substance produced by adding a viscous liquid, prepared by dissolution of ethylcellulose in alpha-terpineol, to the scalelike Al and by knealing it is used for the Al paste. This Al paste is screen-printed on the back of said Si substrate 1 and treated by drying, and then photo receiving plane electrodes 4 are formed after calcination in the atmosphere of nitrogen gas at 750 deg.C. |
