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The study of semiconductor material is a basic experiment. This study aims to identify the effect of SnO2 doped Indium sol-gel color and the effect of the number of slicks on the thin film spread evenly on the glass transparent. The variation of SnO2 doping Indium is 0, 5, 10, 15, 20, and 25%. The technique used in making thin films uses the sol-gel spin coating technique. Spin coating is a technique that is simple, economical, and produces a fairly good thin film. The manufacturing process kind of three stages namely substrate washing, sol-gel making, and thin film growth done respectively. The results showed that sol gel with doping variations had different colors, the higher doping percentage, the clearer sol-gel solution was. The coating results of the thin films have increased, the more coated the surface of the layer looks more evenly with the number of 1, 2, 3, and 4 slicks respectively. The increase doping variations influence to the transparent color of sol-gel be increased. The increase number of slick effect to the thin films more thickness and smooth.