NOVELTY - A fluorine-containing aromatic group-having compound (1), is new.    USE - For partial-hydrolysis condensate of composition used for forming thin film of electronic-electrical component (all claimed), and for battery film material, protective coat, fuel cell, photoresist, anti-reflective coating, light waveguide material, coating material, component for electrons, sealing agent, overcoat agent, transparent-film material, adhesive agent, fiber material, weather resistance coating material, water repellent, oil-repellent agent, moisture-proof coating agent and insulation film of electronic devices e.g. optoelectric transducer, diode, transistor, thermistor, varistor, thyristor, dynamic-random-access-memory (DRAM), static-random-access-memory (SRAM), mask read only memory, flash memory, microprocessor, monolithic-microwave integrated circuit and hybrid integrated circuit, multilayer wiring board e.g. printed wiring board and build-up circuit board, and display.    ADVANTAGE - The novel compound has low dielectric constant and provides thin film with excellent mechanical characteristics. The partial-hydrolysis condensate has excellent resistance with respect to plasma processing and washing process during manufacture of insulation film of electronic devices.    DETAILED DESCRIPTION - A fluorine-containing aromatic group-having compound of formula (1), is new.    V-(-ArF-(-(Y)m-C'=C(Z)-Q))p (1)    ArF = fluorine-containing aromatic group having valency of (n+1);    Y = -T-group, -O-T-group or -S-T-group;    T = 1-8C alkylene group optionally substituted with halogen atom, bivalent cyclic aliphatic group, or phenylene group optionally substituted by halogen atom or 1-4C alkyl group;    Q = H atom, halogen atom, 1-8C alkyl group optionally substituted with halogen atom, univalent cyclic aliphatic group or phenyl group optionally substituted by halogen atom or 1-4C alkyl group;    Z = silyl group having one or more hydrolyzable group substituted on either C or C';    m = 0 or 1;    n = 1-5;and    p = 1-3.    When p is 1, V is fluorine atom or univalent fluorine-containing aromatic group. When p is 2, V is single bond or bivalent fluorine-containing aromatic group. When p is 3, V is trivalent fluorine-containing aromatic group. Z couples with at least one of two carbon atoms having double bond and hydrogen atom couples with other carbon atom.    INDEPENDENT CLAIMS are included for the following:    (1) partial-hydrolysis condensate, which is formed by carrying out partial-hydrolysis condensation of the novel compound;    (2) application composition, contains the partial-hydrolysis condensate and solvent;    (3) partial-hydrolysis condensate film formed on a base material using the application composition;    (4) thin film formed by curing the partial hydrolysis condensate simultaneously during the film formation; and    (5) electronic-electrical component, which has the thin film.