| 摘要 |
PROBLEM TO BE SOLVED: To economically obtain a base plate having high conversion efficiency from a light ray to electricity by forming a polyimide resin thin film on a surface while moving a lengthy strip-like metal base plate in a lengthwise direction, and pressing it by rolls during heating melting to transfer an uneven groove thereto. SOLUTION: A metal base plate 2 is coated on its surface with resin thin film forming solution by a die coater 3 while rewinding the plate 2 wound in a roll state, dried in a heating dry furnace 4, and sandwiched under pressure between transfer rolls 5 to transfer an uneven groove to a surface of the formed resin thin film. Further, it is again dried in a heating dry furnace 6. For example, 3,3',4,4'-benzophenonetetracarboxylic acid anhydride, and 4,4'- diphenylmethanediisocanate-2,4-trylenediisocyanate copolymer are dissolved in dimethylformamide to solution containing 15 wt.% of solid content, and filtered by a filter having a pore size of 1μm to polyamide resin solution for forming a film. |
