Structure, method for manufacturing structure, and composition

Abstract

Provided are a structure having excellent shielding performance against electromagnetic waves in a frequency band of several tens of GHz, and a composition. Further, provided is a method for manufacturing a structure which makes it possible to easily manufacture a structure having excellent shielding performance against electromagnetic waves in a frequency band of several tens of GHz. The structure includes a substrate, a plurality of passive elements disposed on the substrate, and an electromagnetic wave absorbing film positioned at least in a region between the plurality of passive elements disposed on the substrate. The passive element is selected from the group consisting of an inductor and a balun. The electromagnetic wave absorbing film contains magnetic particles. In a case where a real part of a complex relative magnetic permeability μ of the electromagnetic wave absorbing film is defined as μ' and a complex part of the complex relative magnetic permeability μ of the electromagnetic wave absorbing film is defined as μ″, the complex part μ″ of the complex relative magnetic permeability μ of the electromagnetic wave absorbing film satisfies any one of requirements 1 to 3. Requirement 1: μ″ at a frequency of 28 GHz is 0.1 to 10, Requirement 2: μ″ at a frequency of 47 GHz is 0.1 to 5, and Requirement 3: μ″ at a frequency of 60 GHz is 0.1 to 2.