Light emitting diode package with fluorescent cover

• US 20030141563A1
• Filed: 01/28/2002
• Published: 07/31/2003
• Est. Priority Date: 01/28/2002
• Status: Abandoned Application

• Current Assignee: Harvatek Corporation
• Original Assignee: Harvatek Corporation
• Inventors: Wang, Bily
• Application Number:
  US10/056,339
• Publication Number:
  US 20030141563A1
• Time in Patent Office: Days
• US Class Current: 257/432
• 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 33/486 adapted for surface mounting
• CPC Class Codes: H01L 33/505 characterised by the shape, e.g. plate or foil
• CPC Class Codes: H01L 33/507 the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body

Abstract

A blue LED or ultra-violet (UV) LED chip is packaged with a cover of fluorescent material. When the LED emits blue or UV light, the light is converted into colorless or white light radiating from the package. The package is furnished with bottom contacts for surface mounting.

Claims

1. A package for illuminating colorless light, comprising:

light emitting diode (LED) selected from the group consisting of a blue LED and an ultra-violet (UV) LED; and

a fluorescent cover for said LED.

2. The package as described in claim 1, further comprising:

a first metal lead on which the bottom electrode of said LED is mounted and which forms a bottom contact for surface mounting of the package; and

a second metal lead to which the top electrode of said LED is wire-bonded.

3. The package as described in claim 2, further comprising:

two conduits selected from the group consisting of through-holes and edge-recesses, each in said first metal lead and said second metal lead, and

a glue for filling the space between said LED and said fluorescent cover, for filling said through holes, and for spreading along the bottoms of said first metal lead and said second metal lead to bridge said first metal lead and said second metal lead.

4. The package as described in claim 3, wherein said fluorescent cover covers only the top surface of said first glue.

5. The package as described in claim 1, wherein:

the space between said LED and said fluorescent cover is filled with air,

two conduits selected from the group consisting of through-holes and edge-recesses, each in said first metal lead and said second metal lead, and

a glue for filling said through holes and for spreading along the bottoms of said first metal lead and said second metal lead to bridge said first metal lead and said second metal lead together.

6. The package as described in claim 5, wherein said first metal lead and said second metal lead are zigzag in shape and imbedded in a glue for holding said first metal lead and said second lead together.

7. The package as described in claim 2, wherein said first metal lead and said second metal lead are folded around an insulating substrate for holding said first metal lead and said second metal lead together.

8. The package as described in claim 7, wherein the space between the LED and the fluorescent cover is filled with glue.

9. The package as described in claim 7, wherein the space between the LED and the fluorescent cover is filled with air.

10. The package as described in claim 4, wherein an opaque side-wall surrounds said glue.

11. The package as described in claim 2, wherein the width of said fluorescent cover is extended to be the same as the length of said first metal lead and said second metal lead.

12. The package as described in claim 3, wherein the width of the glue and the fluorescent cover is extended to be the same as the length of said first metal lead and of second metal lead.

13. The package as described in claim 5, wherein the width of the fluorescent cover is extended to be the same as the length of said first metal lead and said second metal lead.

14. The package as described in claim 6, wherein the width of the fluorescent cover is extended to be the same as the length of the first metal lead and said second metal lead.

15. The package as described in claim 8, wherein the width of the fluorescent cover is extended to be the same as the length of the first metal lead and said second metal lead.

16. The package as described in claim 9, wherein the width of the fluorescent cover is extended to be the same as the length of the first metal lead and said second metal lead.

17. The package as described in claim 10, wherein the width of the fluorescent cover is extended to be the same as the length of the first metal lead and the second metal lead.