Metal Grating For X-Rays, Production Method For Metal Grating For X-Rays, Metal Grating Unit For X-Rays, And X-Ray Imaging Device

An X-ray metal grating structure comprising a grating-forming workpiece having one surface formed with a grating region in which a plurality of first structural portions mutually having a same shape are periodically provided, wherein:

• the grating region comprising the plurality of first structural portions, a second structural portion as a remaining part of the grating region other than the plurality of first structural portions, and an air gap formed between each of the first structural portions and the second structural portion, in such a manner as to provide a given spacing therebetween in a given planar direction on a grating plane of the grating region, and extend along a direction normal to the grating plane of the grating region;
• and
• the first structural portion and the second structural portion are made, respectively, of first and second grating region materials each having a respective one of mutually different first and second characteristic values of a given characteristic with respect to X-ray, wherein at least one of the first and second grating region materials is a metal.