Scanning antenna

A scanning antenna, in which a plurality of antenna units are arranged, comprising:

• a TFT substrate including a first dielectric substrate, a plurality of TFTs supported on the first dielectric substrate, a plurality of gate bus lines, a plurality of source bus lines, a plurality of patch electrodes, and a first alignment film covering the plurality of patch electrodes;
• a slot substrate including a second dielectric substrate, a slot electrode formed on a first main surface of the second dielectric substrate, the slot electrode including a plurality of slots arranged corresponding to the plurality of patch electrodes, and a second alignment film covering the slot electrode;
• a liquid crystal layer provided between the TFT substrate and the slot substrate, the liquid crystal layer containing a liquid crystal molecule having an isothiocyanate group;
• and
• a reflective conductive plate disposed to face a second main surface on an opposite side to the first main surface of the second dielectric substrate with a dielectric layer interposed therebetween,
• wherein the plurality of patch electrodes and the slot electrodes are each formed of a Cu layer or an Al layer,
• and wherein between the first alignment film and the plurality of patch electrodes and between the second alignment film and the slot electrode are each independently provided with a resin layer containing a compound having an atomic group forming a coordinate bond with Cu or Al.