For thermal emitters at a designed IR-band, choice of materials for MIM patterns becomes important since more emission can be obtained at elevated temperatures. In this regard, when Au and Cr are stacked and heated, Cr will quickly diffuse into Au, destroying the MIM structure and degrading optical properties. Therefore, we focused on searching for homogeneous metallic materials with strong absorption. We propose to use high entropy alloys (HEA), which are, by a narrow definition, metallic materials in which five or more metallic elements are alloyed in the same atomic number ratio. It has the characteristic of maximizing the configuration entropy of the metallic material . The configuration entropy S can be written as: