METHOD FOR FORMING THIN FILM

摘要

PROBLEM TO BE SOLVED: To provide a new method for forming a thin film without the need for a high energy process. SOLUTION: A substrate made of a porous material such as paper is impregnated with a water solution of lead nitrate, and a water solution of sodium sulfide packed in an ink cartridge with a very small nozzle is blown to the surface of the substrate. In this manner, lead of a constituent element of the water solution of lead nitrate reacts with sulfur of a constituent of the water solution of sodium sulfide to form a compound of lead sulfide on the surface of the substrate.