Patent Number: 
Section: claims

1. A scintillator panel for converting radiation into scintillation light, the scintillator panel comprising:a substrate having a front surface and a back surface, and formed with a plurality of convex portions projecting from the front surface in a predetermined direction toward the front surface from the back surface and a concave portion defined by the convex portions;a plurality of first scintillator sections formed on the respective convex portions of the substrate; anda second scintillator section formed on the bottom surface of the concave portion of the substrate;wherein the convex portions are arrayed periodically in a two-dimensional array,the first scintillator section has a first portion extending along the predetermined direction from an upper surface of the convex portion, and a second portion extending along the predetermined direction from side surfaces of the convex portion so as to contact with the first portion,the first and second portions are composed of a plurality of columnar crystals of a scintillator material,the first scintillator sections are separated from one another, andthe second scintillator section is in contact with the second portion. 2. The scintillator panel according to claim 1, whereinthe first portion is composed of a plurality of the columnar crystals formed by crystal growth along the predetermined direction from the upper surface of the convex portion, andthe second portion is composed of a plurality of the columnar crystals formed by crystal growth along a direction intersecting with the predetermined direction from the side surfaces of the convex portion. 3. The scintillator panel according to claim 2, whereina column diameter of the columnar crystals composing the first portion expands as distance from the upper surface of the convex portion increases,a column diameter of the columnar crystals composing the second portion expands as distance from the side surfaces of the convex portion increases, andan enlargement factor of a column diameter of the columnar crystals composing the second portion is greater than an enlargement factor of a column diameter of the columnar crystals composing the first portion. 4. The scintillator panel according to claim 1, wherein a height of the convex portion is greater than column diameters of the columnar crystals. 5. The scintillator panel according to claim 1 further comprising a protective film formed so as to cover the first and second scintillator sections. 6. The scintillator panel according to claim 1 further comprising a light shielding layer formed among the first scintillator sections, and for shielding the scintillation light. 7. A radiation detector comprising;a substrate having a front surface and a back surface, and formed with a plurality of convex portions projecting from the front surface in a predetermined direction toward the front surface from the back surface and a concave portion defined by the convex portions, the substrate having a plurality of photoelectric conversion elements;a plurality of first scintillator sections formed on the respective convex portions of the substrate; anda second scintillator section formed on the bottom surface of the concave portion of the substrate;wherein the convex portions are formed so as to correspond to each of the photoelectric conversion elements, and arrayed periodically in a two-dimensional array,the first scintillator section has a first portion extending along the predetermined direction from an upper surface of the convex portion, and a second portion extending along the predetermined direction from side surfaces of the convex portion so as to contact with the first portion,the first and second portions are composed of a plurality of columnar crystals of a scintillator material,the first scintillator sections are separated from one another, andthe second scintillator section is in contact with the second portion. 8. The radiation detector according to claim 7, wherein the convex portions of the substrate are transmissive to the scintillation light.