SEMICONDUCTOR LIGHT EMITTING DEVICE AND PLANAR LIGHT SOURCE

• US 20090121248A1
• Filed: 10/31/2008
• Published: 05/14/2009
• Est. Priority Date: 11/02/2007
• Status: Active Grant

• Current Assignee: Sanken Electric Company Limited
• Original Assignee: Sanken Electric Company Limited
• Inventors: SANO, Takeshi, HOSHINO, Masanori, TSUKAGOSHI, Kouji
• Granted Patent: US 8,362,493 B2
• Time in Patent Office: Days
• US Class Current: 257/98
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 33/483 Containers
• CPC Class Codes: H01L 33/54 having a particular shape

Abstract

A semiconductor light emitting device includes: a base portion having a concave portion formed in one of major surfaces thereof; and a light emitting element mounted on a bottom surface of the concave portion of the base portion. The base portion comprises a side wall portion that surrounds the light emitting element. The light emitting element is covered with a resin portion filled in the concave portion. At least a part of an upper surface of the resin portion is positioned closer to the bottom surface of the concave portion than an upper surface of the side wall portion.

Claims

1. A semiconductor light emitting device comprising:

a base portion having a concave portion formed in one of major surfaces thereof; and

a light emitting element mounted on a bottom surface of the concave portion of the base portion,

wherein the base portion comprises a side wall portion that surrounds the light emitting element,

wherein the light emitting element is covered with a resin portion filled in the concave portion, and

wherein at least a part of an upper surface of the resin portion is positioned closer to the bottom surface of the concave portion than an upper surface of the side wall portion.

2. The semiconductor light emitting device according to claim 1, wherein an entire part of the upper surface of the resin portion is not positioned farther away from the bottom surface of the concave portion than the upper surface of the side wall portion.

3. The semiconductor light emitting device according to claim 1, wherein a height defined between the upper surface of the resin portion and a plane containing the bottom surface of the concave portion decreases toward a center of the resin portion in cross-sectional view.

4. The semiconductor light emitting device according to claim 1,

wherein the base portion comprises:

a supporting plate containing metal; and

a surrounding portion that surrounds the supporting plate and includes an extending portion extending upward from an upper surface of the supporting plate, and

wherein the light emitting element is disposed on the supporting plate.

5. The semiconductor light emitting device according to claim 4,

wherein the supporting plate has a groove portion formed thereon, and

wherein the light emitting element is disposed on a bottom surface of the groove portion.

6. A planar light source comprising:

a semiconductor light emitting device comprising;

a base portion having a concave portion formed in one of major surfaces thereof; and

a light emitting element mounted on a bottom surface of the concave portion of the base portion,

wherein the base portion comprises a side wall portion that surrounds the light emitting element,

wherein the light emitting element is covered with a resin portion filled in the concave portion, and

wherein at least a part of an upper surface of the resin portion is positioned closer to the bottom surface of the concave portion than an upper surface of said side wall portion; and

a light guide plate into which light emitted from the light emitting element is introduced,

wherein the upper surface of the side wall portion of the base portion is arranged opposite to a side surface of said light guide plate.