TECHNOLOGY FOCUS - CERAMICS AND GLASS - Preferred Properties: The glass cloth has a thickness of 10-200 mu m. A difference in the refractive indices between the organic-inorganic hybrid composition after curing and the glass cloth is less than or equal to 0.01. The diphenylsilanediol, alkoxy silane, polymer or metal alkoxide has a higher refractive index than that of the glass cloth. The other one has a lower refractive index than that of the glass cloth or the same refractive index as that of the glass cloth. Preferred Method: Step (C) is repeated at least once. In step (C), the glass cloth burned in an oxygen furnace at 500-700 degrees C for 10-60 minutes is used. The glass cloth is dipped in the organic-inorganic hybrid composition in a sol state and then cured at 50-300 degrees C for 5-120 minutes.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The organic-inorganic hybrid composition comprises 10-100 pts. wt. alkoxy silane based on 100 pts. wt. diphenylsilanediol. It further comprises more than 0 and less than or equal to 100 pts. wt. metal alkoxide, based on 100 pts. wt. diphenylsilanediol.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The organic-inorganic hybrid composition further comprises more than 0 and less than or equal to 100 pts. wt. polymer, based on 100 pts. wt. diphenylsilanediol. EXAMPLE - Diphenylsilanediol (100 pts. wt.; refractive index of 1.513 before curing), tetraethoxysilane (32.5 pts. wt.; refractive index of 1.382 before curing), glycidyloxypropyltrimethoxysilane (64.0 pts. wt.; refractive index of 1.429 before curing), aminopropyltrimethoxysilane (0.5 pt. wt.; refractive index of 1.424 before curing), aluminum butoxide (2.0 pts. wt.; refractive index of 1.439 before curing and 1.7 after curing), and zirconium propoxide (1.0 pt. wt.; refractive index of 1.451 before curing and 2.2 after curing) were mixed and added with distilled water (80.0 pts. wt.), followed by hydrolysis at 25 degrees C for 24 hours to prepare an organic-inorganic hybrid composition in a sol state. Polyacrylate (5 pts. wt.) was added to prepare a dipping organic-inorganic hybrid composition in a sol state. A glass cloth (50 mu m thickness; refractive index of 1.51) prepared by using S-glass that was burned in an oxygen furnace at 500 degrees C for 10 minutes was dipped into the organic-inorganic hybrid composition in a sol state and then residual solvent was removed at room temperature for 1 minute, followed by primary curing at a 120 degrees C oven for 5 minutes. After curing, another dipping and curing were performed to manufacture a transparent composite film having a thickness of 55 mu m, coefficient of thermal expansion of 17 ppm/K, glass transition temperature of 230 degrees C, no cracks, refractive index of composition after curing of 1.5103, and light transmittance of 85%.