Light-emitting device having tapered portions of different lengths

摘要

A light-emitting device includes a case including a first substrate and a sidewall on the first substrate, a light-emitting, element that is mounted on the first substrate in a region surrounded by the sidewall and includes a second substrate and a crystal layer, the light-emitting element being formed rectangular in a plane viewed in a direction perpendicular to the first substrate, and a low-refractive-index layer that is located between the light-emitting element and the sidewall and has a smaller refractive index than the second substrate. A side surface along a longitudinal direction of the second substrate is provided with a tapered portion on a side of the first substrate.

主权项

1. A light-emitting device, comprising:
a case comprising a first substrate and a sidewall on the first substrate; a light-emitting element that is mounted on the first substrate in a region surrounded by the sidewall and the light-emitting element comprises a second substrate and a crystal layer, the light-emitting element being formed rectangularly with two adjacent sides different in length in a plane viewed in a direction perpendicular to the first substrate; and a low-refractive-index layer that is located between the light-emitting element and the sidewall and has a smaller refractive index than the second substrate, wherein a side surface along a longitudinal direction of the second substrate is provided with a tapered portion on a side of the first substrate, wherein a side surface along a lateral direction of the second substrate is provided with a tapered portion on the side of the first substrate, and wherein a non-tapered portion on the side surface along the longitudinal direction of the second substrate has a higher smoothness than a non-tapered portion on the side surface along a lateral direction of the second substrate.