Side-view type light emitting device

• US 20060186427A1
• Filed: 02/17/2006
• Published: 08/24/2006
• Est. Priority Date: 02/18/2005
• Status: Active Grant

• Current Assignee: Nichia Corporation
• Original Assignee: Nichia Corporation
• Inventors: Yamashita, Ryohei, Takine, Kenji
• Granted Patent: US 7,479,665 B2
• Time in Patent Office: Days
• US Class Current: 257/99
• CPC Class Codes: H01L 2224/45144 Gold (Au) as principal constituent
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• CPC Class Codes: H01L 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• 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 2924/09701 Low temperature co-fired ceramic [LTCC]
• CPC Class Codes: H01L 33/486 adapted for surface mounting
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
• CPC Class Codes: H05K 2201/099 Coating over pads, e.g. solder resist partly over pads
• CPC Class Codes: H05K 2201/09909 Special local insulating pattern, e.g. as dam around component
• CPC Class Codes: H05K 2201/10106 Light emitting diode [LED]
• CPC Class Codes: H05K 2201/10454 Vertically mounted
• CPC Class Codes: H05K 3/3442 having edge contacts, e.g. leadless chip capacitors, chip carriers
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A side-view type light emitting device capable of effectively releasing heat generated on the surface of the substrate is provided. The side-view type light emitting device 1 comprising a substrate 1-1, a positive surface electrode 1-2, a negative surface electrode 1-3, a light emitting element 1-4, a sealing member 1-5 sealing the light emitting element 1-4, a positive rear surface electrode 1-6, a negative rear surface electrode 1-7, and a short-cut preventing member 1-8. The positive surface electrode 1-2 and the positive rear surface electrode 1-6 are electrically connected via a first through hole 1-9 and the negative surface electrode 1-3 and the negative rear surface electrode 1-7 are electrically connected via a second through hole 1-10.

Claims

1. A side-view type light emitting device, comprising:

a substrate,

a positive surface electrode disposed on a surface of said substrate,

a negative surface electrode disposed on the surface of said substrate,

a positive rear surface electrode disposed on a rear surface of said substrate,

a negative rear surface electrode disposed on the rear surface of said substrate,

at least one first through hole provided in said substrate to electrically connect said positive surface electrode and said positive rear surface electrode,

at least one second through hole provided in said substrate to electrically connect said negative surface electrode and said negative rear surface electrode,

a light emitting element mounted on either said positive surface electrode or said negative surface electrode and electrically connected to corresponding positive surface electrode and negative surface electrode,

a sealing member sealing said light emitting element, and

at least one short-circuit preventing member disposed between said positive rear surface electrode and said negative rear surface electrode.

2. The side-view type light emitting device according to claim 1, wherein the short-circuit preventing member overlaps at least one of said positive rear surface electrode and said negative rear surface electrode.

3. The side-view type light emitting device according to claim 1, further comprising a first supplemental rear surface electrode disposed on a side surface of said short-circuit preventing member.

4. The side-view type light emitting device according to claim 3, further comprising a second supplemental rear surface electrode disposed on an opposite side surface of said short-circuit preventing member.

5. The side-view type light emitting device according to claim 1, wherein the short-circuit preventing member has a square or rectangular shape.

6. The side-view type light emitting device according to claim 1, which further comprises a second short-circuit preventing member disposed over the positive rear surface electrode or the negative rear surface electrode.

7. The side-view type light emitting device according to claim 6, wherein the second short-circuit preventing member is located over the negative rear surface electrode.

8. The side-view type light emitting device according to claim 6, further comprising a third supplemental rear surface electrode disposed on a side surface of said second short-circuit preventing member.

9. The side-view type light emitting device according to claim 3, further comprising a fourth supplemental rear surface electrode disposed on an opposite side surface of said second short-circuit preventing member.

10. The side-view type light emitting device according to claim 1, wherein the short short-circuit preventing member is formed from glass epoxy resin or ceramic.

11. The side-view type light emitting device according to claim 6, wherein the second short short-circuit preventing member is formed from glass epoxy resin or ceramic.

12. The side-view type light emitting device according to claim 6, wherein the second short-circuit preventing member has a square or rectangular shape.

13. The side-view type light emitting device according to claim 1,

wherein at least one of said first through hole and second through hole is provided in a region under said light emitting element.

14. The side-view type light emitting device according to claim 1, wherein at least one of said first through hole and second through hole is provided under said light emitting element.

15. A method for manufacturing a side-view type light emitting device, comprising:

providing a substrate;

forming a positive surface electrode and a negative surface electrode disposed on a surface of said substrate;

forming a positive rear surface electrode and a negative rear surface electrode disposed on a rear surface of said substrate;

forming at least one first through hole provided in said substrate to electrically connect said positive surface electrode and said positive rear surface electrode,

forming at least one second through hole provided in said substrate to electrically connect said negative surface electrode and said negative rear surface electrode;

mounting a light emitting element on either said positive surface electrode or said negative surface electrode and electrically connected to corresponding positive surface electrode and negative surface electrode;

forming a sealing member sealing said light emitting element; and

disposing at least one short-circuit preventing member disposed between said positive rear surface electrode and said negative rear surface electrode.

16. The method according to claim 15, wherein the short-circuit preventing member overlaps at least one of said positive rear surface electrode and said negative rear surface electrode.

17. The method according to claim 15, further comprising forming a first supplemental rear surface electrode on a side surface of said short-circuit preventing member.

18. The method according to claim 17, further comprising forming a second supplemental rear surface electrode on an opposite side surface of said short-circuit preventing member.

19. The method according to claim 15, wherein the short-circuit preventing member has a square or rectangular shape.

20. The method according to claim 15, which further comprises forming a second short-circuit preventing member over the positive rear surface electrode or over the negative rear surface electrode.