Chip coated light emitting diode package and manufacturing method thereof

• US 8,013,352 B2
• Filed: 01/08/2010
• Issued: 09/06/2011
• Est. Priority Date: 01/10/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung LED Co., Ltd. (Samsung Electronics Co. Ltd.)
• Inventors: Han, Seong Yeon, Lee, Seon Goo, Han, Kyung Taeg
• Primary Examiner(s): Richards; N Drew
• Assistant Examiner(s): DIALLO, MAMADOU L
• Application Number:
  US12/684,614
• Publication Number:
  US 20100109040A1
• Time in Patent Office: 606 Days
• Field of Search: 257/81, 257/82, 257/91, 257/98, 257/99, 257/100, 257/116, 257/117, 257432-437, 257/749, 257E33056-E33059, 257/E25.032, 438/22
• 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 2224/48257 connecting the wire to a die pad of the item
• CPC Class Codes: H01L 2224/48465 the other connecting portion not on the bonding area being a wedge bond, i.e. ball-to-wedge, regular stitch
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• 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 2924/01078 Platinum [Pt]
• CPC Class Codes: H01L 2924/01079 Gold [Au]
• CPC Class Codes: H01L 33/508 having a non-uniform spatial arrangement or non-uniform concentration, e.g. patterned wavelength conversion layer, wavelength conversion layer with a concentration gradient of the wavelength conversion material
• 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

Abstract

A chip coated LED package and a manufacturing method thereof. The chip coated LED package includes a light emitting chip composed of a chip die-attached on a submount and a resin layer uniformly covering an outer surface of the chip die. The chip coated LED package also includes an electrode part electrically connected by metal wires with at least one bump ball exposed through an upper surface of the resin layer. The chip coated LED package further includes a package body having the electrode part and the light emitting chip mounted thereon. The invention improves light efficiency by preventing difference in color temperature according to irradiation angles, increases a yield, miniaturizes the package, and accommodates mass production.

Claims

1. An illumination device comprising:

a package body having an electrode part; and

a light emitting chip mounted on the package body including;

a submount;

a light emitting diode (LED) chip die attached to the submount;

a resin layer covering an upper surface of the LED chip die; and

at least one bump ball provided on the LED chip die and exposed through an upper surface of the resin layer, the bump ball having an upper surface being substantially coplanar with an upper surface of the resin layer,

wherein the LED chip die has at least one first electrode disposed on the upper surface thereof and a second electrode disposed on a lower surface thereof,

wherein an entire portion of the resin layer under which the LED chip die is disposed has a substantially uniform vertical thickness, and

wherein the at least one bump ball are connected to the first electrode and the electrode part is electrically connected to the at least one bump ball.

2. The illumination device according to claim 1, wherein the resin layer contains a fluorescent material for converting the wavelength of light generated from the LED chip die.

3. The illumination device according to claim 1, wherein the at least one bump ball have a substantially uniform vertical thickness.

4. The illumination device according to claim 1, wherein the resin layer contacts directly a portion of the upper surface of the chip die other than an area of the upper surface of the chip die on which the bump ball is disposed.

5. The illumination device according to claim 1, wherein the electrode part comprises a lead frame integrally provided to the package body.

6. The illumination device according to claim 1, wherein the package body comprises a resin structure which is injection molded with resin to have a cavity formed therein, the cavity for exposing the electrode part with the light emitting chip mounted thereon.

7. The illumination device according to claim 6, wherein the cavity comprises a reflecting part formed on an inner surface thereof for reflecting the light generated from the light emitting chip.

8. The illumination device according to claim 6, wherein the cavity comprises a filler made of transparent resin filled therein and the package body further comprises a lens provided on an upper part thereof.

9. The illumination device according to claim 1, wherein the package body comprises a substrate having the electrode part pattern-printed on an upper surface thereof.

10. An illumination device comprising:

a package body having an electrode part; and

a light emitting chip mounted on the package body including;

a submount,

a light emitting diode (LED) chip die attached to the submount;

a resin layer covering an upper surface of the LED chip die; and

at least one bump ball provided on the LED chip die and exposed through an upper surface of the resin layer,

wherein the LED chip die has at least one first electrode disposed on the upper surface thereof and a second electrode disposed on a lower surface thereof,

wherein an entire portion of the resin layer under which the LED chip die is disposed has a substantially uniform vertical thickness, and

wherein the at least one bump ball are connected to the first electrode and the electrode part is electrically connected to the at least one bump ball,

wherein the package body has a disposition hole formed therein, the disposition hole exposing a metallic chassis with the light emitting chip mounted thereon, and the package body comprises a substrate having the electrode part that is pattern printed on an upper surface of the substrate.

11. The illumination device according to claim 10, wherein the disposition hole comprises a reflecting part formed on an inner surface thereof for reflecting the light generated from the light emitting chip.

12. An illumination device comprising:

a package body having an electrode part; and

a light emitting chip mounted on the package body including;

a submount;

a light emitting diode (LED) chip die attached to the submount;

a resin layer covering an upper surface of the chip die; and

at least one bump ball provided on the chip die and exposed through an upper surface of the resin layer, the bump ball having an upper surface substantially coplanar with an upper surface of the resin layer,

wherein the resin layer directly contacts a portion of the upper surface of the chip die other than an area of the upper surface of the chip die on which the bump ball is disposed,

wherein the electrode part is electrically connected to the at least one bump ball.

13. An illumination device comprising:

a package body having an electrode part; and

a light emitting chip mounted on the package body including;

a submount;

a light emitting diode (LED) chip die attached to the submount;

a resin layer covering an upper surface of the chip die; and

at least one bump ball provided on the chip die and exposed through an upper surface of the resin layer, the bump ball having an upper surface substantially coplanar with an upper surface of the resin layer,

wherein an entire portion of the resin layer under which the LED chip die is disposed has a substantially uniform vertical thickness,

wherein the electrode part is electrically connected to the at least one bump ball.