Antenna device

An antenna device, comprising:

• a first substrate;
• a first conductive layer disposed on the first substrate, the first conductive layer having a first edge;
• a second substrate disposed opposite to the first substrate;
• a second conductive layer disposed on the second substrate, wherein the first edge is aligned with a second edge of an overlapping region of the first conductive layer and the second conductive layer;
• a liquid-crystal layer disposed between the first conductive layer and the second conductive layer;
• a stopper structure disposed on the first edge;
• and
• an alignment layer disposed between the first conductive layer and the liquid-crystal layer,
• wherein the alignment layer comprises a first portion and a second portion, the first portion overlaps the stopper structure in a normal direction of the first substrate, and the second portion overlaps a top surface of the first conductive layer and not overlaps the stopper structure in the normal direction of the first substrate, wherein a minimum thickness of the first portion is different from a minimum thickness of the second portion.