Patent ID: 11867933
Assignee: TOPPAN PRINTING CO., LTD.
Field: Other consumer goods (Other fields)
Classification: CPC B  G | IPC B  G

Claim 3:
4. The display of claim 1, wherein
the reference plane is provided thereon with:
a first lattice layer having a thickness in a range of 10 nm or more and 200 nm or less,
a second lattice layer having a thickness in a range of 10 nm or more and 200 nm or less, and
an intermediate lattice layer having a thickness greater than that of the first lattice layer and that of the second lattice layer and sandwiched between the first lattice layer and the second lattice layer in a thickness direction;

the first lattice layer includes a plurality of first dielectric portions and a first metal layer, the plurality of first dielectric portions being arranged in an island array, the first metal layer having a mesh pattern which surrounds the individual first dielectric portions;
the intermediate lattice layer includes a plurality of first intermediate dielectric portions and a second intermediate dielectric layer, the plurality of first intermediate dielectric portions being arranged in an island array, the second intermediate dielectric layer having a mesh pattern which surrounds the individual first intermediate dielectric portions and having a dielectric constant lower than that of the first intermediate dielectric portions;
the second lattice layer includes a plurality of second metal portions and a second dielectric layer, the plurality of second metal portions being arranged in an island array, the second dielectric layer having a mesh pattern which surrounds the individual second metal portions;
the periodic elements are the convexities, the first dielectric portions and the first intermediate dielectric portions configure the periodic elements, and the first metal layer and the second metal portions are included in the metal layer;
a volume ratio of the first metal layer in the first lattice layer is larger than a volume ratio of the second metal portions in the second lattice layer, and a volume ratio of the second metal portions in the second lattice layer is larger than a volume ratio of metal materials in the intermediate lattice layer; and
a ratio of a width of each of the first dielectric portions to a structural period of the first dielectric portions and a ratio of a width of each of the second metal portions to a structural period of the second metal portions are each in a range of 0.25 or more and 0.75 or less.