TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Substances: The molecule length of long chain substance is two times or more of molecule length of short chain substance. The long chain substance contains fluorocarbon and hydrocarbon groups in side chain, and further has alkoxy silyl group. The molecule composition ratio of long chain substance, short chain substance and substance having siloxane group is 1:10:1-1:0:0. The short chain substance and long chain substance are connect-fixed to silica membrane and/or glass plate through silyl group of silica membrane containing siloxane substance. Alternately, the short chain substance and long chain substance are mutually separated by glass plate surface through silyl and siloxane group. Composite film having critical surface energy of 5-20 mN/m is formed on surface of glass plate through alkali barrier film. The composite film further contains methyl silyl group. The long chain substance has organic fluorine-containing ether group or organic fluorine-containing polyether group of formula (1 or 2). The long chain substance containing organic fluorine-containing ether group or organic fluorine-containing polyether group, and alkoxy silyl group is of formula (3,4 or 5). The short chain substance further having alkoxy silyl group is of formula: CF3-(CF2)o-(CH2)2-Si(OA)3 or CF3-(CF2)o-(CH2)2-SiCH3(OA)2. The substance having alkoxy silyl group is of formula: (AO)3Si(OSi(OA)2)pOA.k,l,m,n,o,p=integer;A=alkyl;OA=chlorine or NCO;andZ=linear functional group, such as (CH2)m, O(CH2)m or (CH2)2O(CH2)mO(CH2)2.Preferred Method: The excess composite film formation solution on surface of glass plate is wash-removed or wiped off using organic solvent. Silica membrane is formed at surface as alkali barrier film before forming composite film. Heating is carried out at 250-450 degrees C. The composite film is processed by a solution containing substance having methyl silyl group. Preferred Solvent: The organic solvent is fluorocarbon group organic solvent. Preferred Catalyst: A ketimine compound or an organic acid, aldimine compound, enamine compound, oxazolidine compound, aminoalkyl alkoxysilane compound or titanium dioxide is used instead of silanol condensation catalyst.