Anisotropic spherical material

特許 権利維持 PROBLEM TO BE SOLVED: To provide a direction measuring method of an anisotropic spherical material, a direction measuring device for the anisotropic spherical material, and a manufacturing method of a spherical acoustic surface wave element, capable of determining accurately a direction showing anisotropy, and manufacturing the highly-accurate spherical acoustic surface wave element by forming a thin-film structure at a specified proper position.