Patent Number: 
Section: claims

1. A method of manufacturing a radiological image conversion panel comprising a phosphor layer containing therein a fluorescent substance which emits light through radiation exposure, the method comprising the step offorming the fluorescent substance into respective columnar structures on one of surfaces of a substrate to thereby obtain a phosphor layer made up of a group of columnar structures;forming a moisture-proof film in a manner to cover an entire outer surface of each of the columnar structures, wherein the columnar structures have deliquescent characteristics, and wherein the moisture-proof film is formed of an inorganic material having a lower refractive index than the refractive index of the columnar structures; andafter forming the moisture-proof film, forming reflection films by respectively covering the entire outer surface of each of the columnar structures with a reflection film while leaving a gap between respective adjoining columnar structures, the reflection film being arranged to reflect light of a predetermined wavelength; wherein a refractive index of the gap is lower than a refractive index of the columnar structures, and the reflection films are formed of an inorganic material having a higher refractive index than the refractive index of the columnar structures. 2. The method of manufacturing a radiological image conversion panel according to claim 1, wherein the reflection films are formed by atomic layer deposition method in the step of forming reflection films. 3. A method of manufacturing a radiological image conversion panel comprising a phosphor layer containing therein a fluorescent substance which emits light through radiation exposure, the method comprising the step of forming the fluorescent substance into respective columnar structures on one of surfaces of a substrate to thereby obtain a phosphor layer made up of a group of columnar structures, the method further comprising the step of:forming a moisture-proof film in a manner to cover an entire outer surface of each of the columnar structures, wherein the columnar structures have deliquescent characteristics, and wherein the moisture-proof film is formed of an inorganic material having a higher refractive index than the refractive index of the reflection films; andafter forming the moisture-proof film, forming reflection films by respectively covering an entire outer surface of each of the columnar structures with a reflection film while leaving a gap between respective adjoining columnar structures, the reflection film being arranged to reflect light of a predetermined wavelength, wherein a refractive index of the gap is higher than a refractive index of the columnar structures, and the reflection films are formed of an inorganic material having a lower refractive index than the refractive index of the columnar structures. 4. A radiological image conversion panel comprising:a substrate and a phosphor layer which is made up of a group of columnar structures of the fluorescent substance formed into respective columnar structures on one of surfaces of the substrate;a moisture-proof film covering an outer surface of each of the columnar structures between the outer surface of each of the columnar structures and the reflection film, wherein the moisture-proof film is formed of an inorganic material having a lower refractive index than the refractive index of the reflection films; anda reflection film which reflects light of a predetermined wavelength, the reflection film covering an entire outer surface of each of the columnar structures,wherein a refractive index of the columnar structures is higher than a refractive index of a gap between respective adjoining columnar structures, and the reflection film is formed of an inorganic material having a higher refractive index than the refractive index of the columnar structures. 5. A radiological image conversion panel comprising:a substrate and a phosphor layer which is made up of a group of columnar structures of the fluorescent substance formed into respective columnar structures on one of surfaces of the substrate;a moisture-proof film covering the outer surface of each of the columnar structures between the outer surface of each of the columnar structures and the reflective film, wherein the moisture-proof film is formed of an inorganic material having a higher refractive index than the refractive index of the reflection films; anda reflection film which reflects light of a predetermined wavelength, the reflection film being arranged to cover an entire outer surface of each of the columnar structures;wherein a refractive index of the columnar structures is lower than a refractive index of a gap between respective adjoining columnar structures, and the reflection film is formed of an inorganic material having a lower refractive index than the refractive index of the columnar structures.