Semiconductor light-emitting device

1. A light-emitting device comprising:

a substrate having a plane surface;

a semiconductor light-emitting element mounted on the plane surface of the substrate and which emits light in a range from ultraviolet ray to visible light;

laminated structure which covers the semiconductor light-emitting element and contacts the plane surface of the substrate, the structure having a radius R 1 and a height R 2 , where R 1 and R 2 satisfy ½(R 1 )<R 2 < 2 R 1 , the laminated structure comprising:

a first light transmissible layer;

a phosphor layer which covers the first light transmissible layer, the phosphor layer contacting with the plane surface of the substrate and containing phosphor particles and matrix, a surface of the phosphor layer having unevenness reflecting shapes of the phosphor particles, the phosphor particles having a diameter ranging from 45 μm to 70 μm; and

a second light transmissible layer which covers the phosphor layer and contacting with the plane surface of the substrate,

wherein the phosphor particles are contained in the phosphor layer at a concentration of 20 wt % or more.

2. The light-emitting device according to claim 1 , wherein the phosphor layer has a cross-section perpendicular to the plane surface of the substrate, a shape of an inner periphery of the cross-section being either semi-arc-shaped, parabola-shaped, or U-shaped, or cornered-shaped having at least two straight lines.

3. The light-emitting device according to claim 1 , wherein the first light transmissible layer has a cross-section perpendicular to the plane surface of the substrate, a shape of an outer periphery of the cross-section being either semi-arc-shaped, parabola-shaped, or U-shaped, or cornered-shaped having at least two straight lines.

4. The light-emitting device according to claim 1 , wherein the second light transmissible layer has a cross-section perpendicular to the plane surface of the substrate, a shape of an outer periphery of the cross-section being either semi-arc-shaped, parabola-shaped, or U-shaped, or cornered-shaped having at least two straight lines.

5. The light-emitting device according to claim 1 , further comprising at least one another phosphor layer adjacent to the phosphor layer or inside of the first light transmissible layer or outside of the second light transmissible layer, the phosphor particles contained in respective phosphor layers being different in at least one of kind and concentration.

6. The light-emitting device according to claim 1 , further comprising a third light transmissible layer above the second light transmissible layer, a refractive index of the third light transmissible layer being different from that of the second light transmissible layer.

7. The light-emitting device according to claim 1 , further comprising at least one another phosphor layer between the first and second light transmissible layers, and a third light transmissible layer being sandwiched between adjacent phosphor layers.

8. The light-emitting device according to claim 1 , wherein an edge of the second light transmissible layer coincides with an outline of the substrate.

9. The light-emitting device according to claim 1 , wherein the unevenness occurs at a top part of the phosphor layer.

10. The light-emitting device according to claim 1 , wherein the matrix is a resin.

11. The light-emitting device according to claim 10 , wherein a reduced trailing of the resin occurs in a trailing part of the phosphor layer.

12. The light-emitting device according to claim 1 , wherein the second light transmissible layer is in contact with air.