NOVELTY - A radiation sensitive resin composition comprises a polymer having structural unit (I) in same or different polymer molecule, and epoxy-group-containing structural unit, photo acid generating body, and semiconductor quantum dot.    USE - Radiation sensitive resin composition for forming cured film, wavelength conversion film and light emitting layer of a light emitting element (all claimed), that is utilized in field of LED and a solar cell.    ADVANTAGE - The composition has outstanding radiation sensitivity, high reliability, improved developability, improved hardening of the film, and improves fluorescence characteristic, reliability, patterning property and productivity of the film, and improves energy conversion efficiency of the semiconductor.    DETAILED DESCRIPTION - A radiation sensitive resin composition comprises a polymer structural unit of formula (I) in same or different polymer molecule, and epoxy-group-containing structural unit, photo acid generating body, and semiconductor quantum dot.    R1, R2 = alkyl, cycloalkyl, aryl (all optionally substituted) or H;    R3 = alkyl, cycloalkyl, aralkyl, aryl (all optionally substituted) or -M(R3m)3;    M = Si, Ge or Sn;    R3m = alkyl group; and    R1+R3 = cyclic ether.    INDEPENDENT CLAIMS are also included for the following:    (1) a cured film formed using the radiation sensitive resin composition    (2) a light emitting element comprising light emitting layer formed using the radiation sensitive resin composition    (3) a wavelength conversion film formed using the radiation sensitive resin composition    (4) a method for forming light emitting layer of a light emitting element, which involves forming coating film of radiation sensitive resin composition on a substrate, irradiating radiation in greater than or equal to 1 sides of the coating film, developing coating film irradiated in radiation and heating the developed coating film.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a light emitting element.    Wavelength conversion substrate (11)    Black matrix (14)    Adhesive bond layer (15)    Light source (16)    Light source substrate (17)