US 2015/0084080 A1 · LIGHT EMITTING APPARATUS AND METHOD FOR MANUFACTURING SAME

Abstract

There is provided a light-emitting device comprising a light-emitting element and a substrate for light-emitting element. The light-emitting element is in a mounted state on a mounting surface of the substrate, the mounting surface being one of two opposed main surfaces of the substrate. The substrate is provided with a protection element for the light-emitting element, the protection element comprising a voltage-dependent resistive layer embedded in the substrate, and comprising a first electrode and a second electrode each of which is in connection with the voltage-dependent resistive layer. The mounted light-emitting element is in an overlapping relation with the voltage-dependent resistive layer. A reflective layer is provided on at least one of the substrate and the voltage-dependent resistive layer such that the reflective layer is located adjacent to the first electrode which is in contact with a substrate exposure surface of the voltage-dependent resistive layer.

Claims17

Dependent claims

A light-emitting device comprising a light-emitting element and a substrate for light-emitting element,

wherein the light-emitting element is in a mounted state on a mounting surface of the substrate, the mounting surface being one of two opposed main surfaces of the substrate,
wherein the substrate is provided with a protection element for the light-emitting element, the protection element comprising a voltage-dependent resistive layer embedded in the substrate, and comprising a first electrode and a second electrode each of which is in connection with the voltage-dependent resistive layer,
wherein the mounted light-emitting element is in an overlapping relation with the voltage-dependent resistive layer, and
wherein a reflective layer is provided on at least one of the substrate and the voltage-dependent resistive layer such that the reflective layer is located adjacent to the first electrode which is in contact with a substrate exposure surface of the voltage-dependent resistive layer.

1 more element

A method for manufacturing a light-emitting device comprising a substrate for light-emitting element and a light-emitting element mounted on the substrate, the substrate including a varistor element comprising a voltage-dependent resistive layer embedded in the substrate and first and second electrodes each of which is in connection with the voltage-dependent resistive layer, the method comprising the steps of:

(A) forming a second electrode precursor layer on a main surface of a green sheet;
(B) pressing the second electrode precursor layer into the green sheet from above by means of a convex-shaped die, and thereby forming a recessed portion in the green sheet with the second electrode precursor layer disposed on a bottom surface of the recessed portion;
(C) disposing the voltage-dependent resistive layer in the recessed portion;
(D) sintering the green sheet with the voltage-dependent resistive layer and the second electrode precursor layer disposed in the recessed portion of the green sheet, and thereby producing a substrate with the voltage-dependent resistive layer and the second electrode embedded in the substrate;
(E) forming a reflective layer on the substrate and/or the voltage-dependent resistive layer;
and
(F) forming the first electrode on the substrate except for a forming region for the reflective layer, the first electrode being in contact with the voltage-dependent resistive layer.

4 more elements

Dependencies are inferred from the claim text.

Light emitting apparatus and method for manufacturing same

Life of this patent

Light emitting apparatus and method for manufacturing same

Life of this patent

Abstract

Claims17