Source: http://www.google.com/patents/US20100112735?ie=ISO-8859-1
Timestamp: 2015-07-03 13:51:29
Document Index: 218592363

Matched Legal Cases: ['Application No. 2006', 'art 17', 'art 120', 'art 120', 'art 120', 'art 120']

Patent US20100112735 - Chip coated light emitting diode package and manufacturing method thereof - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA 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...http://www.google.com/patents/US20100112735?utm_source=gb-gplus-sharePatent US20100112735 - Chip coated light emitting diode package and manufacturing method thereofAdvanced Patent SearchPublication numberUS20100112735 A1Publication typeApplicationApplication numberUS 12/684,578Publication dateMay 6, 2010Filing dateJan 8, 2010Priority dateJan 10, 2006Also published asUS7714342, US7795052, US8013352, US8324646, US20070158669, US20100109040, US20100289051Publication number12684578, 684578, US 2010/0112735 A1, US 2010/112735 A1, US 20100112735 A1, US 20100112735A1, US 2010112735 A1, US 2010112735A1, US-A1-20100112735, US-A1-2010112735, US2010/0112735A1, US2010/112735A1, US20100112735 A1, US20100112735A1, US2010112735 A1, US2010112735A1InventorsSeon Goo Lee, Kyung Taeg Han, Seong Yeon HanOriginal AssigneeSamsung Electro-Mechanics Co., LtdExport CitationBiBTeX, EndNote, RefManReferenced by (3), Classifications (19), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetChip coated light emitting diode package and manufacturing method thereof
US 20100112735 A1Abstract
10. A method of manufacturing a chip coated Light Emitting Diode (LED) package comprising:
die-attaching a plurality of chip dies on a wafer; providing at least one bump ball on an upper surface of each of the chip dies; forming a resin layer to cover the chip dies including the bump balls; polishing an upper surface of the resin layer to expose the bump balls; and cutting the wafer and the resin layer between the chip dies into individual light emitting chips. 11. The method according to claim 10, wherein the step of forming a resin layer comprises printing a resin material on the wafer to cover the chip dies including the bump balls and thermally curing the printed resin layer.
12. The method according to claim 10, wherein the resin layer is made of a resin material containing a fluorescent material for converting the wavelength of light generated from the chip dies.
13. The method according to claim 10, further comprising: mounting each of the light emitting chips comprising the chip die mounted on a submount and the resin layer covering an outer surface of the chip die on an electrode part of a package body formed by injection molding to have an upward-opening cavity, and wire bonding the light emitting chip with the electrode part comprising a lead frame by a metal wire.
14. The method according to claim 10, further comprising: mounting each of the light emitting chips comprising a chip die mounted on a submount and a resin layer covering an outer surface of the chip die on an upper surface of a metallic chassis, and wire bonding the light emitting chip with the electrode part comprising an electrode pattern formed on an upper surface of the package body having a disposition hole formed therein, the disposition hole exposing the light emitting diode chip, by a metal wire.
This application claims the benefit of Korean Patent Application No. 2006-0002829 filed on Jan. 10, 2006, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.
In general, a Light Emitting Diode (hereinafter referred to as ‘LED’) is an electric component which converts electric energy to light energy from recombination of minority carriers (electrons and holes) injected through a p-n junction structure of semiconductor and thereby emits the light. That is, when a forward voltage is applied to a semiconductor of a particular element, electrons and holes migrate through the junction of an anode and a cathode and recombine with each other. The recombined state has a smaller energy than when the electrons and the holes are separated from each other. Using this difference in energy, the LED emits light.
The range of light generated from the LED is from a red region (630 nm to 780 nm) to a blue-Ultraviolet region (350 nm) including blue, green and white. As the LEDs have advantages such as low power consumption, high efficiency, prolonged operation and lifetime, the demand therefore has been increasing.
Such a fluorescent material is a wavelength-converting means that converts a first wavelength of blue light emitted from the light emitting chip 14 to a second wavelength of white light. The fluorescent material is made of Yitrium Aluminum Garnett (YAG) -based, Terbium Aluminum Garnett (TAG) -based, or silicate-based powder, and is mixed in the transparent resin, the main substance of the transparent resin part 17.
FIG. 2( a) to (f) is a view illustrating a manufacturing process of an LED package according to the present invention;
FIG. 2( a) to (f) is a view illustrating the fabrication of a chip coated LED package according to the present invention and FIG. 3 is a perspective view illustrating a chip coated LED package according to a first embodiment of the present invention.
In the meantime, FIG. 4 illustrates a chip coated LED package according to a second embodiment of the present invention. In this embodiment, the package body 130 of the. LED package 100 a may include a metal chassis 132 with the light emitting chip 110 mounted thereon and a substrate 131 having a predetermined dimension of disposition hole 133 for exposing the light emitting chip 110 and having the electrode part 120 pattern printed on an upper surface thereof.
As shown in FIG. 2( a), a manufacturing method of the LED package with the above described configuration starts with die-attaching a plurality of chip dies 101 manufactured by a semiconductor process on a wafer W.
In addition, as shown in FIG. 2( b), at least one bump ball 102 is provided on an upper surface of each of the chip dies 101 die-attached on the wafer W.
Subsequently, as shown in FIG. 2( c), the step of forming a resin layer 103 on the wafer W includes printing a transparent resin such as silicone and epoxy on the wafer W to cover the plurality of chip dies 101 each with the bump ball 102 provided on an upper surface thereof.
In addition, as shown in FIG. 2( d) , an upper surface of the resin layer 103 provided on the wafer W is polished by a polishing means (not shown) to expose the bump balls 102 provided on the chip dies 101. The polishing method can be selected in consideration of precision and productivity, such as using a grinder or cutting with a fly cutter.
Subsequently, as shown in FIG. 2( e) , the wafer W with the chip dies 101 and the resin layer 103 polished to expose the bump balls 102 is cut along horizontal and vertical cut lines between the adjacent chip dies 101 and separated into light emitting chips 110 generating light when power is applied.
As shown in FIG. 2( f) , the light emitting chip 110 with the above configuration is mounted on an upper surface of the electrode part 120 provided as a lead frame 121, and the electrode part 120 is wire bonded to an end of the metal wire 125 having the other end bonded to the bump ball 102 of the light emitting chip 110.
When a forward current is applied to the LED packages 100 and 100 a with the above described configurations, the light emitting chip 110 is supplied with current via the electrode part 120, and thereby the chip die 101 of the light emitting chip 110 emits light in a color out of Red R, Green G and Blue B depending on the material of the semiconductor constituting the chip die 101.
Referenced byCiting PatentFiling datePublication dateApplicantTitleUS7846754 *Aug 27, 2009Dec 7, 2010Samsung Led Co., Ltd.High power light emitting diode package and method of producing the sameUS8049323 *Feb 16, 2007Nov 1, 2011Taiwan Semiconductor Manufacturing Co., Ltd.Chip holder with wafer level redistribution layerUS20120300465 *Nov 14, 2011Nov 29, 2012Samsung Electronics Co., Ltd.Display device* Cited by examinerClassifications U.S. Classification438/27, 257/E33.056, 257/E33.061, 257/E21.499International ClassificationH01L33/58, H01L33/44, H01L33/00, H01L33/50, H01L33/62, H01L21/50Cooperative ClassificationH01L2224/48247, H01L33/62, H01L2924/01078, H01L2924/01079, H01L2224/48257, H01L2224/48091, H01L2224/48465, H01L33/508European ClassificationH01L33/62Legal EventsDateCodeEventDescriptionAug 7, 2012ASAssignmentFree format text: MERGER;ASSIGNOR:SAMSUNG LED CO., LTD.;REEL/FRAME:028744/0272Owner name: SAMSUNG ELECTRONICS CO., LTD., KOREA, REPUBLIC OFEffective date: 20120403Feb 28, 2014FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services