WO2009072786A2 - Led package and method for fabricating the same - Google Patents
Led package and method for fabricating the same Download PDFInfo
- Publication number
- WO2009072786A2 WO2009072786A2 PCT/KR2008/007103 KR2008007103W WO2009072786A2 WO 2009072786 A2 WO2009072786 A2 WO 2009072786A2 KR 2008007103 W KR2008007103 W KR 2008007103W WO 2009072786 A2 WO2009072786 A2 WO 2009072786A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- encapsulation member
- housing
- led package
- molding process
- led chip
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 78
- 238000005538 encapsulation Methods 0.000 claims abstract description 130
- 238000001721 transfer moulding Methods 0.000 claims abstract description 54
- 229920005989 resin Polymers 0.000 claims abstract description 29
- 239000011347 resin Substances 0.000 claims abstract description 29
- 238000000465 moulding Methods 0.000 claims description 21
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 4
- 239000012778 molding material Substances 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 2
- 229910052906 cristobalite Inorganic materials 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 229910052682 stishovite Inorganic materials 0.000 claims description 2
- 229910052905 tridymite Inorganic materials 0.000 claims description 2
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 claims description 2
- 229920006336 epoxy molding compound Polymers 0.000 description 16
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 239000007787 solid Substances 0.000 description 7
- 239000004593 Epoxy Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 229920001296 polysiloxane Polymers 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 3
- 229920002050 silicone resin Polymers 0.000 description 3
- RKUAZJIXKHPFRK-UHFFFAOYSA-N 1,3,5-trichloro-2-(2,4-dichlorophenyl)benzene Chemical compound ClC1=CC(Cl)=CC=C1C1=C(Cl)C=C(Cl)C=C1Cl RKUAZJIXKHPFRK-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/52—Encapsulations
- H01L33/54—Encapsulations having a particular shape
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/483—Containers
- H01L33/486—Containers adapted for surface mounting
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/58—Optical field-shaping elements
- H01L33/60—Reflective elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/64—Heat extraction or cooling elements
- H01L33/641—Heat extraction or cooling elements characterized by the materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/64—Heat extraction or cooling elements
- H01L33/642—Heat extraction or cooling elements characterized by the shape
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/64—Heat extraction or cooling elements
- H01L33/647—Heat extraction or cooling elements the elements conducting electric current to or from the semiconductor body
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
- H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/484—Connecting portions
- H01L2224/48463—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond
- H01L2224/48465—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond the other connecting portion not on the bonding area being a wedge bond, i.e. ball-to-wedge, regular stitch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
- H01L2933/0008—Processes
- H01L2933/0033—Processes relating to semiconductor body packages
- H01L2933/005—Processes relating to semiconductor body packages relating to encapsulations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
- H01L2933/0091—Scattering means in or on the semiconductor body or semiconductor body package
Definitions
- the present invention relates to a light emitting diode (LED) package and a method of fabricating the same, and more particularly, to an improvement of an LED package, which includes a light-transmittable encapsulation member for encapsulating an LED chip and a housing configured to surround the encapsulation member.
- LED light emitting diode
- An LED is a semiconductor light emitting device in which a current is supplied thereto and electrons and holes may be recombined in p-n semiconductor junctions to emit light.
- the LED is fabricated as a package structure including an LED chip, and the light emitting device configured as described above may be generally referred to as an "LED package.”
- the LED package includes a base which is mounted with the LED chip and is provided with electric terminals, and a light-transmittable encapsulation member which is configured to protect the LED chip.
- a lead frame or a printed circuit board (PCB) has been prevailingly used as the base which is mounted with the LED chip.
- the LED package may also be classified into a lead frame type LED package and a PCB type LED package.
- an additional component such as a heat sink may also be used as the base which is mounted with the LED chip.
- the lead frame type LED package includes a housing for defining a cavity in which the encapsulation member is formed.
- a housing generally serves to reflect light in order to narrow a viewing angle, i.e., in order to collect light, so that the housing has been referred to as a reflector.
- the housing is formed of an opaque resin material by an ejection molding process and then a liquefied light-transmittable resin is injected into the cavity of the housing in a dotting manner to thereby form the encapsulation member. It is conventionally difficult to design and fabricate the LED package with a viewing angle of light variably changed.
- the design for the light viewing angle of the housing primarily depends on the shape for the reflection surface of the housing (in particular, the angle for the reflection surface). Further, since there is a large difference between the molding method of the housing and the molding method of the encapsulation member, it is difficult to consecutively fabricate the LED package and the fabrication process for the LED package is cumbersome and complicated.
- the encapsulation member is configured to have an undesired, upwardly convex shape due to the surface tension exerted on the liquefied resin.
- the shape of the encapsulation member deteriorates various performances of the LED package in the optical aspect. For example, if the LED package fabricated as described above is employed in the back light, the convex portion of the encapsulation member faces a light guide plate, thereby generating a hot spot phenomenon, i.e., a phenomenon in which there exists a point-shaped region excessively brighter than other regions.
- an object of the present invention is to provide an LED package and a method for fabricating the same, in which an encapsulation member for encapsulating an LED chip within a housing is easily designed to have a shape as required.
- Another object of the present invention is to provide an LED package and a method for fabricating the same, in which a housing is formed of a light- transmittable material which may control the transparency and the viewing angle, so that controlling the transparency of the housing may enlarge a design range for the viewing angle of light.
- a further object of the present invention is to provide an LED package and a method for fabricating the same, in which a housing is formed by a method which is identical to or similar with a process for forming an encapsulation member, thereby being capable of fabricating the LED package in a consecutive and simple manner.
- An LED package comprises a base having an LED chip mounted thereon, an encapsulation member formed by a light-transmittable resin to encapsulate the LED chip, and a housing formed to expose a top portion of the encapsulation member and to encompass a side surface of the encapsulation member, wherein the encapsulation member is formed by a molding process using a mold to have a top surface of a desired shape.
- the top portion of the encapsulation member may be formed in the shape of a plane or lens.
- the molding process using a mold be transfer molding process.
- the housing may be formed by a transfer molding process before or after the encapsulation member is formed. Further, the housing is light- transmittable. More preferably, the housing may be a semitransparent housing, which includes a diffuser for adjusting the transparency of the housing and is used as a reflector.
- An LED package comprises a base having an LED chip mounted thereon, an encapsulation member formed by a light-transmittable resin to encapsulate the LED chip, and a housing formed to expose a top portion of the encapsulation member and to encompass a side surface of the encapsulation member, wherein the housing is light-transmittable.
- the housing and the encapsulation member are preferably formed by a transfer molding process.
- a method for fabricating an LED package comprises the steps of mounting an LED chip on a base, forming a housing for supporting the base, and forming an light-transmittable encapsulation member for encapsulating the LED chip, the housing encompassing a side surface of the encapsulation member, wherein the step of forming the encapsulation member comprises the step of molding the encapsulation member using a mold so that the encapsulation member has a predetermined, desired top surface.
- the molding process is transfer molding process.
- a method for fabricating an LED package comprises the steps of: mounting an LED chip on a base, forming an light-transmittable encapsulation member for encapsulating the LED chip and supporting the base, and forming a housing for encompassing a side surface of the encapsulation member, wherein the step of forming the encapsulation member comprises the step of molding the encapsulation member using a mold.
- the molding process is transfer molding process.
- a mixing ratio of the diffuser is preferably adjusted to adjust a viewing angle.
- the transfer molding is repeated twice or more in the step of forming the housing as described above, a structure in which a plurality of the housings are laminated with each other is made.
- the transfer molding is referred to as multiple transfer molding.
- the transfer molding is repeated twice or more in the step of forming the encapsulation member as described above, a structure in which a plurality of the encapsulation members are laminated with each other is made.
- the transfer molding is referred to as multiple transfer molding.
- the encapsulation member is separately formed in a dotting manner
- only one mold having a plurality of spaces for forming an encapsulation member is used, and the liquefied resin is filled in the spaces at a time and then is rapidly cured according to one embodiment of the present invention.
- a plurality of LED packages can be quickly fabricated, thereby largely enhancing the productivity of LED packages.
- FIG. 1 is a perspective view illustrating an LED package according to an embodiment of the present invention.
- Fig. 2 is a sectional view illustrating the LED package according to the embodiment of the present invention.
- Figs. 3 to 5 are photographs showing LED packages, in which the transparency of a light-transmittable housing is adjusted depending on the content of a diffuser included therein.
- Figs. 6 (a) and 6 (b) are sectional views illustrating LED packages according to other embodiments of the present invention.
- Fig. 7 shows views illustrating a method of fabricating an LED package according to an embodiment of the present invention.
- Fig. 8 shows views illustrating a transfer molding process for a housing and an encapsulation member in the method of fabricating an LED package as shown in Fig. 7.
- Fig. 9 shows views illustrating a method of fabricating an LED package according to another embodiment of the present invention.
- Fig. 10 is a view illustrating a transfer molding process for an encapsulation member according to a further embodiment of the present invention, wherein the transfer molding process is appropriate to form an encapsulation member of an LED package having a thin housing.
- Fig. 11 is a view illustrating a transfer molding process for an encapsulation member according to a still further embodiment of the present invention.
- Fig. 12 is a view illustrating an LED package according to a still further embodiment of the present invention.
- Fig. 1 is a perspective view illustrating an LED package according to an embodiment of the present invention
- Fig. 2 is a sectional view illustrating the LED package according to the embodiment of the present invention.
- an LED package 1 includes a lead frame 10 having a first lead terminal 12 and a second lead terminal 14, wherein the lead frame 10 functions as a base on which a LED chip 2 is mounted.
- the lead frame 10 is formed by cutting a large patterned thin metal plate in order to provide the first lead terminal 12 and the second lead terminal 14 which are spaced apart from each other. At this time, a plurality of the lead frames 10 for a plurality of the LED packages may be obtained from the thin metal plate. Further, the cutting process of the lead frame 10 is performed after a housing 20 and an encapsulation member 30, which will be described later, are formed.
- the LED chip 2 is die-attached onto a top surface of the first lead terminal 12 of the lead frame 10, and the LED chip 2 on the first lead terminal 12 is electrically connected to the second lead terminal 14 via a bonding wire.
- the LED package 1 of this embodiment includes the housing 20 and the encapsulation member 30.
- the encapsulation member 30 is formed of a light- transmittable material and encapsulates the LED chip 2 to protect the LED chip 2 and the like.
- the housing 20 may function as a reflector and is configured to encompass a side surface of the encapsulation member 30 and to expose a top portion of the encapsulation member 30.
- the housing 20 serves to support the lead frame 10, i.e., the first lead terminal 12 and the second lead terminal 14.
- the encapsulation member 30 and the housing 20 are formed by a transfer molding process.
- the housing 20 is formed of an epoxy molding compound (EMC) by the transfer molding process in order to support the lead frame 10 before the encapsulation member 30 is formed.
- EMC epoxy molding compound
- a bottom surface of the housing 20 is substantially flush with that of the lead frame 10, so that the first and second lead terminals 12 and 14 of the lead frame 10 may be exposed to the outside in the neighborhood of the bottom surface of the housing 20 even without a bending process.
- the housing 20 is formed of the EMC into which a white, milky and/or light gray diffuser 21 (as shown in Fig. 2) such as
- the housing 20 comprises the diffuser 21, so that the transparency of the housing 20 and the viewing angle of the LED package 1 can be adjusted depending on the content of the diffuser 21 mixed into the transparent EMC.
- Figs. 3 to 5 are photographs of practical products of LED packages in which the transparency of the housing 20 varies depending on the content of the diffuser 21.
- the LED package shown in Fig. 3 includes a housing formed of a transparent EMC without TiO 2 diffuser. The housing is substantially transparent, and the amount of light emitted through the housing is so large that the viewing angle is relatively broad.
- the LED package shown in Fig. 4 includes the housing formed of an EMC in which 0.3 % of the TiO 2 diffuser is mixed.
- the housing is semitransparent, and the amount of the light reflected from the inner surface of the housing toward the encapsulation member is so large that the viewing angle of the LED package shown in Fig. 4 is narrower than that of the LED package shown in Fig. 3.
- the LED package shown in Fig. 5 includes a housing formed of an EMC in which 3% of the
- TiO 2 diffuser is mixed.
- the transparency of the housing is the smallest, and the LED package may emit the light with a narrow light viewing angle of about 120 degrees which is appropriate for a backlight unit.
- the housing 20 is shaped to encompass the side surface of the encapsulation member 30 on the whole and to allow the top portion of the encapsulation member 30 to be exposed. Since the housing 20 for supporting the lead frame 10 is formed prior to the encapsulation member 30 in this embodiment, the housing 20 is configured to include a cavity for defining the position of the encapsulation member 30 which will be subsequently formed.
- the encapsulation member 30, into which a light-transmittable resin such as epoxy or silicone is molded is formed by a molding process using a mold, particularly, by a transfer molding process in order to obtain a desired shape.
- the encapsulation member 30 is formed by a molding process using a mold, particularly, by a transfer molding process, wherein the molding process using a mold allows the shape of a top surface 31, through which the light is primarily emitted, to be formed as desired.
- the transfer molding makes it possible to form the encapsulation member 30 having a planar top surface.
- a phosphor which is excited by light having a specific wavelength to emit light having a different wavelength may be contained in the encapsulation member 30.
- the shape of the encapsulation member 30 is not limited to the planar shape, but various encapsulation members 30 having hemispherically convex or concave lens shapes or various lens shapes having Fresnel patterns may be formed by a molding process using a mold, such as a transfer molding process. Fresnel pattern contributes to enlarging the viewing angle of its corresponding lens.
- Fig. 6 (a) shows the configuration of the LED package 1 according to another embodiment of the present invention, wherein a lens type encapsulation member 30 having a hemispheric top surface, is formed by a transfer molding process.
- a lens type encapsulation member 30 having a hemispheric top surface is formed by a transfer molding process.
- another base which is mounted the LED chip 2 with may be used.
- a printed circuit board (PCB) 100 is used as the base which is mounted with the LED chip 2.
- the LED chip 2 is mounted on the top central region of the PCB 100.
- the top surface of the PCB 100 is provide with first and second electrode patterns 102 and 103 which are electrically connected to the LED chip 2 by bonding wires, wherein the first and second electrode patterns 102 and 103 may be formed by an electroplating process.
- both the encapsulation member 30 and the housing 20 are formed by a transfer molding process.
- thermosetting plastic such as epoxy or silicone.
- a portion to be firstly formed is not influenced by the melting temperature of the other portion to be formed later.
- a housing having a cavity is formed by a transfer molding process and then a liquefied resin is injected into the cavity in a dotting manner to form the encapsulation member 30. If the transfer molding is used, it is possible to make an integrated housing 20 in which a plurality of partial housings are laminated by repeating the transfer molding twice or more in order to form the integrated housing.
- transfer molding it is possible to make an integrated encapsulation member 30 in which a plurality of partial encapsulation members are laminated by repeating the transfer molding twice or more.
- the transfer molding repeated twice or more as described above is referred to as multiple transfer molding.
- FIG. 7 shows plan views illustrating a method for fabricating an LED package according to an embodiment of the present invention on a process-by- process basis.
- the lead frame 10 which includes the first and second lead terminals 12 and 14 is prepared.
- the LED chip is mounted on the lead frame 10 and the bonding wire is connected to the lead frame 10
- the LED chip and the bonding wire will be omitted from the drawings for the convenience of illustration.
- the lead frame 10 is no more than a portion of a patterned thin metal plate including a plurality of lead frames which have not been cut yet in the practical method for fabricating the LED package, only one lead frame 10 which has been previously cut is shown for the convenience of illustration and description.
- the housing 20 is formed on the lead frame 10 by a transfer molding process.
- the housing 20 causes the first and second lead terminals 12 and 14 to be exposed upwards through the cavity of the housing 20 itself.
- the housing 20 formed on the lead frame 10 supports the lead frame 10.
- a molding material used for the transfer molding of the housing 20 is a tablet-type solid EMC which is made by adding a diffuser to a transparent powder-type EMC.
- a light-transmittable resin such as silicone may be used without using epoxy as the primary component.
- the encapsulation member 30 of epoxy or silicone for encapsulating the LED chip (not shown in Fig.
- a transfer molding process is formed inside of the cavity of the housing 20 by a transfer molding process.
- a solid EMC in particular, a tablet-type solid EMC
- the encapsulation member may be formed of a liquefied epoxy or silicone by an injection molding process.
- the shape of the encapsulation member 30 molded by means of a mold is previously defined by the previously designed mold, and the shape of the encapsulation member is preferably shaped as a plane or lens. At this time, since the encapsulation member 30 is formed in the cavity of the housing 20, the housing 20 is shaped to surround the side surface of the encapsulation member 30 on the whole.
- Fig. 8 (a) is a view illustrating a transfer molding process for the housing 20, and Fig. 8 (b) is a view illustrating a transfer molding process of the encapsulation member 30.
- a resin under the high temperature and pressure is injected into a mold Ml for forming the housing, which includes an injection hole I, so that the mold Ml is filled with the resin, and then, the housing 20 is formed by curing the filled resin.
- a gate G (see Fig. 8 (b)) to be used for the transfer molding of the encapsulation member 30 which will be performed later has been previously formed.
- a groove which has been previously formed on an upper end of the cavity of the housing 20 may be used as a resin injection gate.
- the resin is injected into a space defined by the cavity of the housing 20 and the mold M2 through an injection hole I of a mold M2 for forming the encapsulation member and the gate G which has been previously formed in the housing 20.
- the shape of the top surface of the encapsulation member is defined, for example, in the shape of a plane or lens by means of the mold M2.
- Figs. 7 and 8 are accomplished for the lead frame 10, they may be accomplished for another kind of base such as a PCB instead of the lead frame 10. Except that the other kind of base is used instead of the lead frame, the processes shown in Figs. 7 and 8 may be applied as they are without further modification.
- Fig. 9 shows plan views illustrating a method for fabricating an LED package according to another embodiment of the present invention on a process-by- process basis.
- the lead frame 10 which comprises the first and second lead terminals 12 and 14 is prepared as shown in Fig. 9 (a).
- the LED chip is mounted on the lead frame 10 and the bonding wire is connected to the lead frame 10, the LED chip and the bonding wire will be omitted from the drawings for the convenience of illustration.
- the lead frame 10 is no more than a portion of a patterned thin metal plate including a plurality of lead frames which have not been cut yet in the practical method for fabricating the LED package, only one lead frame 10 which has been previously cut is shown for the convenience of illustration and description.
- the encapsulation member 30 for encapsulating the LED chip (not shown in Fig. 9) is previously formed prior to the formation of the housing 20.
- the encapsulation member 30 is formed to support the lead frame 10 which comprises the first and second lead terminals 12 and 14.
- the encapsulation member 30 is formed in the shape predetermined by the mold for transfer molding.
- a solid EMC (in particular, a tablet-type solid EMC) may be used in the transfer molding process of the encapsulation member 30, wherein the solid EMC may include a phosphor.
- injection molding may be used to form the encapsulation member 30, wherein a liquefied epoxy resin or a liquefied silicone resin is directly injected into the mold in the injection molding process.
- the liquefied epoxy resin or the liquefied silicone resin may include a phosphor.
- the housing 20 is formed for surrounding the side surface of the encapsulation member 30.
- the transfer molding may also be used.
- Either a tablet-type solid EMC which is made by adding a diff ⁇ ser to a transparent powder type EMC or a liquefied epoxy or silicone may be used as the molding material used for the transfer molding of the housing 20.
- Fig. 10 is a view illustrating a transfer molding process in which a resin is directly injected into a cavity of the turned-over housing 20 according to a further embodiment of the present invention.
- a mold M3 causes the cavity of the housing
- the mold M3 has an injection hole I directly connected to the cavity of the housing 20.
- the transfer molding process may be preferably used to form the encapsulation member, for example, in a side view type LED package in which the thickness of the housing 20 is relatively thin so that the housing 20 may be easily broken.
- Fig. 11 is a view illustrating a transfer molding process for an encapsulation member according to a still further embodiment of the present invention.
- a cavity 201 in which an LED chip is received is formed in the housing 20, and the cavity 201 is closed by a plate-shaped mold M4 which is positioned on the top side of the cavity.
- a groove 202 is formed at an edge of the cavity
- the groove 202 conforms to an injection hole I which is formed in the mold M4 with the cavity 201 closed by the mold M4, so that an injection passage for a resin into the cavity 201 may be compartmentally formed. If the resin is injected through the injection hole I and the groove 202 and then the injected resin is cured, the encapsulation member 30 is formed in the cavity 201.
- the upper shape of the encapsulation member 30 is defined by the mold M4. For example, if the mold M4 having a planar surface for closing the cavity 201 is used, the encapsulation member 30 whose top surface is plane is formed.
- lenses having various shapes i.e., a spherical lens, a Fresnel lens or other shaped lens, may be formed. Patterns, roughness and/or unevenness on a surface of the lens may be regular or irregular.
- upper and lower molds for receiving and supporting a housing or an LED package including the housing and a mold M4 used for the molding may be used to molding the encapsulation member while the upper and lower molds and the mold M4 are assembled as a set.
- Fig. 12 is a plan view illustrating an LED package according to a still further embodiment of the present invention.
- a plurality of recesses 102 for receiving the LED chip 102 are formed on the base 10, which may comprise a lead frame, a PCB or other substrates.
- another plurality of recesses 103 for receiving bonding pads (or wire balls) for the bonding wires are further formed on the base 10. The recesses 102 and prevent the LED packages from not being slimed (or compacted) by increasing the thickness of the LED chip 2 or the bonding pads (or wire balls).
- the recess 102 in which the LED chip 2 is received, may be filled with a resin (preferably, a silicone resin) including an anti-deterioration material and/or a phosphor.
- the recesses 102 and 103 may contribute to increasing the adhesion between the encapsulation member 30 and the lead frame 10.
- a plurality of recesses which are in contact with the encapsulation member to increase the adhesion, may be formed on the base 10 irregardless of the position of the LED chip and the bonding pads.
- the present invention is not limited to the aforementioned embodiments but may be applied to all kinds of LED packages having an encapsulation member and a housing, for example, a side view type LED package, a PCB type or chip LED package, a lamp type LED package or a high-flux type LED package as well as a top type LED package.
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- Manufacturing & Machinery (AREA)
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Abstract
An LED package is disclosed herein. The disclosed LED package comprises a base having an LED chip mounted thereon, an encapsulation member formed by a light-transmittable resin to encapsulate the LED chip, and a housing formed to expose a top portion of the encapsulation member and to encompass a side surface of the encapsulation member, wherein the encapsulation member is formed by a transfer molding process using a mold to have a predetermined shape. Further, the housing may be light-transmittable.
Description
[DESCRIPTION] [invention Title]
LED PACKAGE AND METHOD FOR FABRICATING THE SAME [Technical Field] The present invention relates to a light emitting diode (LED) package and a method of fabricating the same, and more particularly, to an improvement of an LED package, which includes a light-transmittable encapsulation member for encapsulating an LED chip and a housing configured to surround the encapsulation member. [Background Art]
An LED is a semiconductor light emitting device in which a current is supplied thereto and electrons and holes may be recombined in p-n semiconductor junctions to emit light. Conventionally, the LED is fabricated as a package structure including an LED chip, and the light emitting device configured as described above may be generally referred to as an "LED package."
Generally, the LED package includes a base which is mounted with the LED chip and is provided with electric terminals, and a light-transmittable encapsulation member which is configured to protect the LED chip. A lead frame or a printed circuit board (PCB) has been prevailingly used as the base which is mounted with the LED chip. Depending on what is used as the base, the LED package may also be classified into a lead frame type LED package and a PCB type LED package. Further, an additional component such as a heat sink may also be used as the base which is mounted with the LED chip.
The lead frame type LED package includes a housing for defining a cavity in which the encapsulation member is formed. Such a housing generally serves to reflect light in order to narrow a viewing angle, i.e., in order to collect light, so that the housing has been referred to as a reflector. In the LED package as described above, the housing is formed of an opaque resin material by an ejection molding process and then a liquefied light-transmittable resin is injected into the cavity of the housing in a dotting manner to thereby form the encapsulation member.
It is conventionally difficult to design and fabricate the LED package with a viewing angle of light variably changed. This is because the design for the light viewing angle of the housing primarily depends on the shape for the reflection surface of the housing (in particular, the angle for the reflection surface). Further, since there is a large difference between the molding method of the housing and the molding method of the encapsulation member, it is difficult to consecutively fabricate the LED package and the fabrication process for the LED package is cumbersome and complicated.
According to the technique in which a liquefied resin is injected into the cavity of the ejection-molded housing in a dotting manner to form the encapsulation member, the encapsulation member is configured to have an undesired, upwardly convex shape due to the surface tension exerted on the liquefied resin. The shape of the encapsulation member deteriorates various performances of the LED package in the optical aspect. For example, if the LED package fabricated as described above is employed in the back light, the convex portion of the encapsulation member faces a light guide plate, thereby generating a hot spot phenomenon, i.e., a phenomenon in which there exists a point-shaped region excessively brighter than other regions. At this time, it is noted that such a convex shape of the encapsulation member as described above is different from that of the convex lens that is designed as required to control the viewing angle of light. On the other hand, if the amount of the liquefied resin injected into the cavity is reduced, there is generated an undesired, concave shape to thereby decrease the light emitting efficiency of the LED package. [Disclosure] [Technical Problem] Accordingly, an object of the present invention is to provide an LED package and a method for fabricating the same, in which an encapsulation member for encapsulating an LED chip within a housing is easily designed to have a shape as required.
Another object of the present invention is to provide an LED package and a method for fabricating the same, in which a housing is formed of a light-
transmittable material which may control the transparency and the viewing angle, so that controlling the transparency of the housing may enlarge a design range for the viewing angle of light.
A further object of the present invention is to provide an LED package and a method for fabricating the same, in which a housing is formed by a method which is identical to or similar with a process for forming an encapsulation member, thereby being capable of fabricating the LED package in a consecutive and simple manner. [Technical Solution]
An LED package according to an aspect of the present invention comprises a base having an LED chip mounted thereon, an encapsulation member formed by a light-transmittable resin to encapsulate the LED chip, and a housing formed to expose a top portion of the encapsulation member and to encompass a side surface of the encapsulation member, wherein the encapsulation member is formed by a molding process using a mold to have a top surface of a desired shape. At this time, the top portion of the encapsulation member may be formed in the shape of a plane or lens. Here, it is preferable that the molding process using a mold be transfer molding process.
Preferably, the housing may be formed by a transfer molding process before or after the encapsulation member is formed. Further, the housing is light- transmittable. More preferably, the housing may be a semitransparent housing, which includes a diffuser for adjusting the transparency of the housing and is used as a reflector.
An LED package according to another aspect of the present invention comprises a base having an LED chip mounted thereon, an encapsulation member formed by a light-transmittable resin to encapsulate the LED chip, and a housing formed to expose a top portion of the encapsulation member and to encompass a side surface of the encapsulation member, wherein the housing is light-transmittable. At this time, the housing and the encapsulation member are preferably formed by a transfer molding process. A method for fabricating an LED package according to an aspect of the
present invention comprises the steps of mounting an LED chip on a base, forming a housing for supporting the base, and forming an light-transmittable encapsulation member for encapsulating the LED chip, the housing encompassing a side surface of the encapsulation member, wherein the step of forming the encapsulation member comprises the step of molding the encapsulation member using a mold so that the encapsulation member has a predetermined, desired top surface. Preferably, the molding process is transfer molding process.
A method for fabricating an LED package according to another aspect of the present invention comprises the steps of: mounting an LED chip on a base, forming an light-transmittable encapsulation member for encapsulating the LED chip and supporting the base, and forming a housing for encompassing a side surface of the encapsulation member, wherein the step of forming the encapsulation member comprises the step of molding the encapsulation member using a mold. Preferably, the molding process is transfer molding process. In the step of forming the housing, a mixing ratio of the diffuser is preferably adjusted to adjust a viewing angle.
Further, if the transfer molding is repeated twice or more in the step of forming the housing as described above, a structure in which a plurality of the housings are laminated with each other is made. The transfer molding is referred to as multiple transfer molding. Further, if the transfer molding is repeated twice or more in the step of forming the encapsulation member as described above, a structure in which a plurality of the encapsulation members are laminated with each other is made. The transfer molding is referred to as multiple transfer molding. [Advantageous Effects 1 According to an embodiment of the present invention, a control range of a light viewing angle of an LED package is enlarged, and the LED package can be easily designed to have the desired light viewing angle. Further, it is possible to solve various problems, which are caused by a shape of an encapsulation member that would not be required during the fabrication of the LED package, such as a hot spot phenomenon, in which a contact portion between a light guide plate and the
encapsulation member of the LED package is excessively bright when the LED package is used as a backlight, or the degradation of the light emitting efficiency caused by the concave shape of the encapsulation member. Further, according to an embodiment of the present invention, since the encapsulation member and the housing are formed by a transfer molding process, a molding equipment may be used as it is while a mold may be replaced with another to form both the encapsulation member and the housing, which is more economical than the prior art. Furthermore, unlike the prior art in which the encapsulation member is separately formed in a dotting manner, only one mold having a plurality of spaces for forming an encapsulation member is used, and the liquefied resin is filled in the spaces at a time and then is rapidly cured according to one embodiment of the present invention. Thus, a plurality of LED packages can be quickly fabricated, thereby largely enhancing the productivity of LED packages.
[Description of Drawings] Fig. 1 is a perspective view illustrating an LED package according to an embodiment of the present invention.
Fig. 2 is a sectional view illustrating the LED package according to the embodiment of the present invention.
Figs. 3 to 5 are photographs showing LED packages, in which the transparency of a light-transmittable housing is adjusted depending on the content of a diffuser included therein.
Figs. 6 (a) and 6 (b) are sectional views illustrating LED packages according to other embodiments of the present invention.
Fig. 7 shows views illustrating a method of fabricating an LED package according to an embodiment of the present invention.
Fig. 8 shows views illustrating a transfer molding process for a housing and an encapsulation member in the method of fabricating an LED package as shown in Fig. 7.
Fig. 9 shows views illustrating a method of fabricating an LED package according to another embodiment of the present invention.
Fig. 10 is a view illustrating a transfer molding process for an encapsulation member according to a further embodiment of the present invention, wherein the transfer molding process is appropriate to form an encapsulation member of an LED package having a thin housing. Fig. 11 is a view illustrating a transfer molding process for an encapsulation member according to a still further embodiment of the present invention.
Fig. 12 is a view illustrating an LED package according to a still further embodiment of the present invention. [Best Mode] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided only for illustrative purposes so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the following embodiments but may be implemented in other forms. In the drawings, the widths, lengths, thicknesses and the like of elements may be exaggerated for convenience of illustration. Like reference numerals indicate like elements throughout the specification and drawings.
Fig. 1 is a perspective view illustrating an LED package according to an embodiment of the present invention, and Fig. 2 is a sectional view illustrating the LED package according to the embodiment of the present invention.
Referring to Figs. 1 and 2, an LED package 1 according to this embodiment includes a lead frame 10 having a first lead terminal 12 and a second lead terminal 14, wherein the lead frame 10 functions as a base on which a LED chip 2 is mounted. The lead frame 10 is formed by cutting a large patterned thin metal plate in order to provide the first lead terminal 12 and the second lead terminal 14 which are spaced apart from each other. At this time, a plurality of the lead frames 10 for a plurality of the LED packages may be obtained from the thin metal plate. Further, the cutting process of the lead frame 10 is performed after a housing 20 and an encapsulation member 30, which will be described later, are formed. The LED chip 2 is die-attached onto a top surface of the first lead terminal
12 of the lead frame 10, and the LED chip 2 on the first lead terminal 12 is electrically connected to the second lead terminal 14 via a bonding wire.
Further, the LED package 1 of this embodiment includes the housing 20 and the encapsulation member 30. The encapsulation member 30 is formed of a light- transmittable material and encapsulates the LED chip 2 to protect the LED chip 2 and the like. The housing 20 may function as a reflector and is configured to encompass a side surface of the encapsulation member 30 and to expose a top portion of the encapsulation member 30. In this embodiment, the housing 20 serves to support the lead frame 10, i.e., the first lead terminal 12 and the second lead terminal 14.
As will be described in detail below, the encapsulation member 30 and the housing 20 are formed by a transfer molding process. In this embodiment, the housing 20 is formed of an epoxy molding compound (EMC) by the transfer molding process in order to support the lead frame 10 before the encapsulation member 30 is formed. At this time, a bottom surface of the housing 20 is substantially flush with that of the lead frame 10, so that the first and second lead terminals 12 and 14 of the lead frame 10 may be exposed to the outside in the neighborhood of the bottom surface of the housing 20 even without a bending process.
In order to function as the reflector, the housing 20 is formed of the EMC into which a white, milky and/or light gray diffuser 21 (as shown in Fig. 2) such as
TiO2, SiO2, ZnO or Y2O3 is mixed. Therefore, the housing 20 comprises the diffuser 21, so that the transparency of the housing 20 and the viewing angle of the LED package 1 can be adjusted depending on the content of the diffuser 21 mixed into the transparent EMC. Figs. 3 to 5 are photographs of practical products of LED packages in which the transparency of the housing 20 varies depending on the content of the diffuser 21. The LED package shown in Fig. 3 includes a housing formed of a transparent EMC without TiO2 diffuser. The housing is substantially transparent, and the amount of light emitted through the housing is so large that the viewing angle is relatively broad. The LED package shown in Fig. 4 includes the housing formed of an EMC in which
0.3 % of the TiO2 diffuser is mixed. The housing is semitransparent, and the amount of the light reflected from the inner surface of the housing toward the encapsulation member is so large that the viewing angle of the LED package shown in Fig. 4 is narrower than that of the LED package shown in Fig. 3. The LED package shown in Fig. 5 includes a housing formed of an EMC in which 3% of the
TiO2 diffuser is mixed. The transparency of the housing is the smallest, and the LED package may emit the light with a narrow light viewing angle of about 120 degrees which is appropriate for a backlight unit.
Referring back to Figs. 1 and 2, the housing 20 is shaped to encompass the side surface of the encapsulation member 30 on the whole and to allow the top portion of the encapsulation member 30 to be exposed. Since the housing 20 for supporting the lead frame 10 is formed prior to the encapsulation member 30 in this embodiment, the housing 20 is configured to include a cavity for defining the position of the encapsulation member 30 which will be subsequently formed. In this embodiment, the encapsulation member 30, into which a light-transmittable resin such as epoxy or silicone is molded, is formed by a molding process using a mold, particularly, by a transfer molding process in order to obtain a desired shape.
It is preferable that the encapsulation member 30 is formed by a molding process using a mold, particularly, by a transfer molding process, wherein the molding process using a mold allows the shape of a top surface 31, through which the light is primarily emitted, to be formed as desired. For example, the transfer molding makes it possible to form the encapsulation member 30 having a planar top surface. When a liquefied resin is injected into the cavity of the housing to form the encapsulation member, the surface tension makes it impossible to obtain the planar shape as desired above. However, it is noted that the present invention does not completely exclude the injection of the liquefied resin into the cavity in a dotting manner.
A phosphor which is excited by light having a specific wavelength to emit light having a different wavelength may be contained in the encapsulation member 30.
The shape of the encapsulation member 30 is not limited to the planar shape, but various encapsulation members 30 having hemispherically convex or concave lens shapes or various lens shapes having Fresnel patterns may be formed by a molding process using a mold, such as a transfer molding process. Fresnel pattern contributes to enlarging the viewing angle of its corresponding lens.
Fig. 6 (a) shows the configuration of the LED package 1 according to another embodiment of the present invention, wherein a lens type encapsulation member 30 having a hemispheric top surface, is formed by a transfer molding process. Meanwhile, instead of the lead frame 10 as described in the previous embodiment, another base which is mounted the LED chip 2 with may be used. For example, in the LED package 1 shown in Fig. 6 (b), a printed circuit board (PCB) 100 is used as the base which is mounted with the LED chip 2. Referring to Fig. 6 (b), the LED chip 2 is mounted on the top central region of the PCB 100. Further, the top surface of the PCB 100 is provide with first and second electrode patterns 102 and 103 which are electrically connected to the LED chip 2 by bonding wires, wherein the first and second electrode patterns 102 and 103 may be formed by an electroplating process. In this embodiment, both the encapsulation member 30 and the housing 20 are formed by a transfer molding process. Although it has been described above that the housing 20 is first transfer- molded and the encapsulation member 30 is then transfer-molded as describe above, it may be considered that the encapsulation member 30 is first transfer-molded and the housing 20 is then transfer-molded. It is easy to separately transfer-mold the housing and the encapsulation member regardless of their sequential order particularly when the housing and the encapsulation member are formed of thermosetting plastic such as epoxy or silicone. This is because a portion to be firstly formed is not influenced by the melting temperature of the other portion to be formed later. Further, it may be considered that a housing having a cavity is formed by a transfer molding process and then a liquefied resin is injected into the cavity in a dotting manner to form the encapsulation member 30.
If the transfer molding is used, it is possible to make an integrated housing 20 in which a plurality of partial housings are laminated by repeating the transfer molding twice or more in order to form the integrated housing. Further, if the transfer molding is used, it is possible to make an integrated encapsulation member 30 in which a plurality of partial encapsulation members are laminated by repeating the transfer molding twice or more. The transfer molding repeated twice or more as described above is referred to as multiple transfer molding.
Now, various embodiments of a method for fabricating the LED package as described above will be described. Fig. 7 shows plan views illustrating a method for fabricating an LED package according to an embodiment of the present invention on a process-by- process basis.
First, as shown in Fig. 7 (a), the lead frame 10 which includes the first and second lead terminals 12 and 14 is prepared. At this time, although the LED chip is mounted on the lead frame 10 and the bonding wire is connected to the lead frame 10, the LED chip and the bonding wire will be omitted from the drawings for the convenience of illustration. Further, although the lead frame 10 is no more than a portion of a patterned thin metal plate including a plurality of lead frames which have not been cut yet in the practical method for fabricating the LED package, only one lead frame 10 which has been previously cut is shown for the convenience of illustration and description.
Then, as shown in Fig. 7 (b), the housing 20 is formed on the lead frame 10 by a transfer molding process. The housing 20 causes the first and second lead terminals 12 and 14 to be exposed upwards through the cavity of the housing 20 itself. In addition, the housing 20 formed on the lead frame 10 supports the lead frame 10. At this time, it is preferable that a molding material used for the transfer molding of the housing 20 is a tablet-type solid EMC which is made by adding a diffuser to a transparent powder-type EMC. However, a light-transmittable resin such as silicone may be used without using epoxy as the primary component. Then, as shown in Fig. 7 (c), the encapsulation member 30 of epoxy or
silicone for encapsulating the LED chip (not shown in Fig. 7) is formed inside of the cavity of the housing 20 by a transfer molding process. In the transfer molding of the encapsulation member 30, a solid EMC (in particular, a tablet-type solid EMC) is used. Another molding process using a mold may be considered, and for example, the encapsulation member may be formed of a liquefied epoxy or silicone by an injection molding process. Further, the shape of the encapsulation member 30 molded by means of a mold is previously defined by the previously designed mold, and the shape of the encapsulation member is preferably shaped as a plane or lens. At this time, since the encapsulation member 30 is formed in the cavity of the housing 20, the housing 20 is shaped to surround the side surface of the encapsulation member 30 on the whole.
Fig. 8 (a) is a view illustrating a transfer molding process for the housing 20, and Fig. 8 (b) is a view illustrating a transfer molding process of the encapsulation member 30. Referring to Fig. 8 (a), a resin under the high temperature and pressure is injected into a mold Ml for forming the housing, which includes an injection hole I, so that the mold Ml is filled with the resin, and then, the housing 20 is formed by curing the filled resin. At this time, a gate G (see Fig. 8 (b)) to be used for the transfer molding of the encapsulation member 30 which will be performed later has been previously formed. Further, instead of the gate G, a groove which has been previously formed on an upper end of the cavity of the housing 20 may be used as a resin injection gate.
Referring to Fig. 8 (b), the resin is injected into a space defined by the cavity of the housing 20 and the mold M2 through an injection hole I of a mold M2 for forming the encapsulation member and the gate G which has been previously formed in the housing 20. At this time, the shape of the top surface of the encapsulation member is defined, for example, in the shape of a plane or lens by means of the mold M2.
Although the processes shown in Figs. 7 and 8 are accomplished for the lead frame 10, they may be accomplished for another kind of base such as a PCB instead
of the lead frame 10. Except that the other kind of base is used instead of the lead frame, the processes shown in Figs. 7 and 8 may be applied as they are without further modification.
Fig. 9 shows plan views illustrating a method for fabricating an LED package according to another embodiment of the present invention on a process-by- process basis.
First, the lead frame 10 which comprises the first and second lead terminals 12 and 14 is prepared as shown in Fig. 9 (a). At this time, although the LED chip is mounted on the lead frame 10 and the bonding wire is connected to the lead frame 10, the LED chip and the bonding wire will be omitted from the drawings for the convenience of illustration. Further, although the lead frame 10 is no more than a portion of a patterned thin metal plate including a plurality of lead frames which have not been cut yet in the practical method for fabricating the LED package, only one lead frame 10 which has been previously cut is shown for the convenience of illustration and description.
Then, as shown in Fig. 9 (b), the encapsulation member 30 for encapsulating the LED chip (not shown in Fig. 9) is previously formed prior to the formation of the housing 20. The encapsulation member 30 is formed to support the lead frame 10 which comprises the first and second lead terminals 12 and 14. The encapsulation member 30 is formed in the shape predetermined by the mold for transfer molding.
A solid EMC (in particular, a tablet-type solid EMC) may be used in the transfer molding process of the encapsulation member 30, wherein the solid EMC may include a phosphor. Alternatively, instead of the transfer molding, injection molding may be used to form the encapsulation member 30, wherein a liquefied epoxy resin or a liquefied silicone resin is directly injected into the mold in the injection molding process. The liquefied epoxy resin or the liquefied silicone resin may include a phosphor.
Then, as shown in Fig. 9 (c), the housing 20 is formed for surrounding the side surface of the encapsulation member 30. At this time, the transfer molding may also be used. Either a tablet-type solid EMC which is made by adding a
diffυser to a transparent powder type EMC or a liquefied epoxy or silicone may be used as the molding material used for the transfer molding of the housing 20.
Fig. 10 is a view illustrating a transfer molding process in which a resin is directly injected into a cavity of the turned-over housing 20 according to a further embodiment of the present invention. A mold M3 causes the cavity of the housing
20 to be closed. Further, the mold M3 has an injection hole I directly connected to the cavity of the housing 20. The transfer molding process may be preferably used to form the encapsulation member, for example, in a side view type LED package in which the thickness of the housing 20 is relatively thin so that the housing 20 may be easily broken.
Fig. 11 is a view illustrating a transfer molding process for an encapsulation member according to a still further embodiment of the present invention. Referring to Fig. 11, a cavity 201 in which an LED chip is received is formed in the housing 20, and the cavity 201 is closed by a plate-shaped mold M4 which is positioned on the top side of the cavity. In addition, a groove 202 is formed at an edge of the cavity
201 (and more particularly, adjacent to a vertex of the cavity). The groove 202 conforms to an injection hole I which is formed in the mold M4 with the cavity 201 closed by the mold M4, so that an injection passage for a resin into the cavity 201 may be compartmentally formed. If the resin is injected through the injection hole I and the groove 202 and then the injected resin is cured, the encapsulation member 30 is formed in the cavity 201. The upper shape of the encapsulation member 30 is defined by the mold M4. For example, if the mold M4 having a planar surface for closing the cavity 201 is used, the encapsulation member 30 whose top surface is plane is formed. Depending on the surface shape of the mold M4 for closing the encapsulation member 30, lenses having various shapes, i.e., a spherical lens, a Fresnel lens or other shaped lens, may be formed. Patterns, roughness and/or unevenness on a surface of the lens may be regular or irregular.
Although not drawn, upper and lower molds for receiving and supporting a housing or an LED package including the housing and a mold M4 used for the
molding may be used to molding the encapsulation member while the upper and lower molds and the mold M4 are assembled as a set.
Fig. 12 is a plan view illustrating an LED package according to a still further embodiment of the present invention. Referring to Fig. 12, a plurality of recesses 102 for receiving the LED chip 102 are formed on the base 10, which may comprise a lead frame, a PCB or other substrates. In addition, another plurality of recesses 103 for receiving bonding pads (or wire balls) for the bonding wires are further formed on the base 10. The recesses 102 and prevent the LED packages from not being slimed (or compacted) by increasing the thickness of the LED chip 2 or the bonding pads (or wire balls). In particular, the recess 102, in which the LED chip 2 is received, may be filled with a resin (preferably, a silicone resin) including an anti-deterioration material and/or a phosphor. In addition, the recesses 102 and 103 may contribute to increasing the adhesion between the encapsulation member 30 and the lead frame 10. In order to increase the adhesion, it may be considered that a plurality of recesses, which are in contact with the encapsulation member to increase the adhesion, may be formed on the base 10 irregardless of the position of the LED chip and the bonding pads.
The present invention is not limited to the aforementioned embodiments but may be applied to all kinds of LED packages having an encapsulation member and a housing, for example, a side view type LED package, a PCB type or chip LED package, a lamp type LED package or a high-flux type LED package as well as a top type LED package.
Claims
[CLAIMS] [Claim l]
An LED package, comprising: a base having an LED chip mounted thereon; an encapsulation member formed of a light-transmittable resin to encapsulate the LED chip, the encapsulation member being formed by a molding process using a mold to have a desired top surface; and a housing formed to expose a top portion of the encapsulation member and to encompass a side surface of the encapsulation member.
[Claim 2]
The LED package as claimed in claim 1, wherein the housing is formed by a transfer molding process before or after the encapsulation member is formed.
[Claim 3]
The LED package as claimed in claim 2, wherein the housing is light- transmittable.
[Claim 4]
The LED package as claimed in claim 3, wherein the housing is a semitransparent housing, which includes a diffuser for adjusting a viewing angle and is used as a reflector.
[Claim 5]
The LED package as claimed in claim 1, wherein the top portion of the encapsulation member is formed in the shape of a plane or lens.
[Claim 6]
The LED package as claimed in claim 1, wherein the molding process using a mold is transfer molding process.
[Claim 7]
An LED package, comprising: a base having an LED chip mounted thereon; an encapsulation member formed by a light-transmittable resin to encapsulate the LED chip; and a housing formed to expose a top portion of the encapsulation member and to encompass a side surface of the encapsulation member, the housing being light- transmittable.
[Claim 8]
The LED package as claimed in claim 7, wherein the housing is a semitransparent housing, which includes a diffuser for adjusting a viewing angle and is used as a reflector.
[Claim 9] The LED package as claimed in claim 7, wherein the housing and the encapsulation member are formed by a transfer molding process.
[Claim 10]
The LED package as claimed in claim 1 or 7, wherein an upper surface of the base is formed with at least one recess for receiving the LED chip or a bonding pad for a bonding wire.
[Claim 11]
A method for fabricating an LED package, comprising the steps of: mounting an LED chip on a base; forming a housing for supporting the base; and forming an light-transmittable encapsulation member for encapsulating the
LED chip, the housing encompassing a side surface of the encapsulation member, wherein the step of forming the encapsulation member comprises the step of molding the encapsulation member using a mold so that the encapsulation member has a desired top surface.
[Claim 12]
A method for fabricating an LED package, comprising the steps of: mounting an LED chip on a base; forming an light-transmittable encapsulation member for encapsulating the LED chip and supporting the base; and forming a housing for encompassing a side surface of the encapsulation member, wherein the step of forming the encapsulation member comprises the step of molding the encapsulation member using a mold so that the encapsulation member has a desired top surface.
[Claim 13]
The method as claimed in claim 11 or 12, wherein the step of forming the housing is performed by a transfer molding process.
[Claim 14] The method as claimed in claim 13, wherein the step of forming the housing is performed using a molding material in which a diffuser is mixed into a transparent resin.
[Claim 15]
The method as claimed in claim 14, wherein in the step of forming the housing, a mixing ratio of the diffuser is adjusted to adjust a viewing angle.
[Claim 16]
The method as claimed in claim 14, wherein the diffuser is at least one selected from the group consisting of TiO2, SiO2, ZnO and Y2O3.
[Claim 17] The method as claimed in claim 11 or 12, wherein the step of forming the encapsulation member is performed by a transfer molding process.
[Claim 18]
The method as claimed in claim 11 or 12, wherein the step of forming the encapsulation member or the housing is performed by a multiple transfer molding process.
[Claim 19]
An LED package, comprising: a base having an LED chip mounted thereon; an encapsulation member formed by a light-transmittable resin to encapsulate the LED chip; and a housing formed to expose a top portion of the encapsulation member and to encompass a side surface of the encapsulation member, wherein the housing is formed by a transfer molding process using a mold. [Claim 20]
The LED package as claimed in claim 19, wherein the encapsulation member is formed by injecting a liquefied light-transmittable resin into a cavity in a dotting manner, the cavity being formed in the housing.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010536841A JP2011507228A (en) | 2007-12-06 | 2008-12-02 | LED package and method of manufacturing the same |
US12/746,447 US20110108866A1 (en) | 2007-12-06 | 2008-12-02 | Led package and method for fabricating the same |
EP08857114.6A EP2215667B1 (en) | 2007-12-06 | 2008-12-02 | Method for fabricating an led package |
US14/142,071 US9698319B2 (en) | 2007-12-06 | 2013-12-27 | LED package with lead terminals having protrusions of differing widths and method for fabricating the same |
US14/318,125 US20140306257A1 (en) | 2007-12-06 | 2014-06-27 | Led package and method for fabricating the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20070126436A KR101488448B1 (en) | 2007-12-06 | 2007-12-06 | Led package and method for fabricating the same |
KR10-2007-0126436 | 2007-12-06 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/746,447 A-371-Of-International US20110108866A1 (en) | 2007-12-06 | 2008-12-02 | Led package and method for fabricating the same |
US14/142,071 Continuation US9698319B2 (en) | 2007-12-06 | 2013-12-27 | LED package with lead terminals having protrusions of differing widths and method for fabricating the same |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2009072786A2 true WO2009072786A2 (en) | 2009-06-11 |
WO2009072786A3 WO2009072786A3 (en) | 2009-09-03 |
Family
ID=40718337
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2008/007103 WO2009072786A2 (en) | 2007-12-06 | 2008-12-02 | Led package and method for fabricating the same |
Country Status (6)
Country | Link |
---|---|
US (3) | US20110108866A1 (en) |
EP (1) | EP2215667B1 (en) |
JP (1) | JP2011507228A (en) |
KR (1) | KR101488448B1 (en) |
TW (1) | TWI497746B (en) |
WO (1) | WO2009072786A2 (en) |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002052615A2 (en) | 2000-12-27 | 2002-07-04 | Osram Opto Semiconductors Gmbh | Radiation-emitting semiconductor component with a luminescence conversion element |
US20050093005A1 (en) | 2002-06-28 | 2005-05-05 | Osram Opto Semiconductors Gmbh | Optoelectronic component and method for producing it |
US20050245018A1 (en) | 2001-10-31 | 2005-11-03 | Georg Bogner | Optoelectronic component |
WO2007007959A1 (en) | 2005-07-13 | 2007-01-18 | Seoul Semiconductor Co., Ltd. | Mold for forming a molding member and method of fabricating a molding member using the same |
US20070034886A1 (en) | 2005-08-11 | 2007-02-15 | Wong Boon S | PLCC package with integrated lens and method for making the package |
EP1801893A2 (en) | 2005-12-26 | 2007-06-27 | Kabushiki Kaisha Toshiba | Lens-equipped light-emitting diode device and method of manufacturing the same |
Family Cites Families (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3504079B2 (en) * | 1996-08-31 | 2004-03-08 | 株式会社東芝 | Method for manufacturing semiconductor light emitting diode device |
KR19980025874A (en) * | 1996-10-05 | 1998-07-15 | 김광호 | Semiconductor chip package for CCD |
JP3356068B2 (en) * | 1998-07-27 | 2002-12-09 | 松下電器産業株式会社 | Method for manufacturing photoelectric conversion element |
JP2000183407A (en) * | 1998-12-16 | 2000-06-30 | Rohm Co Ltd | Optical semiconductor device |
JP2001168400A (en) * | 1999-12-09 | 2001-06-22 | Rohm Co Ltd | Chip type light emitting device with case and its manufacturing method |
US20030075724A1 (en) * | 2001-10-19 | 2003-04-24 | Bily Wang | Wing-shaped surface mount package for light emitting diodes |
JP3474841B2 (en) * | 2000-09-14 | 2003-12-08 | スタンレー電気株式会社 | Manufacturing method of surface mount components |
JP4009097B2 (en) * | 2001-12-07 | 2007-11-14 | 日立電線株式会社 | LIGHT EMITTING DEVICE, ITS MANUFACTURING METHOD, AND LEAD FRAME USED FOR MANUFACTURING LIGHT EMITTING DEVICE |
JP2004158557A (en) * | 2002-11-05 | 2004-06-03 | Shurai Kagi Kofun Yugenkoshi | Similar flip chip type light emitting diode device package |
JP3910171B2 (en) * | 2003-02-18 | 2007-04-25 | シャープ株式会社 | Semiconductor light emitting device, method for manufacturing the same, and electronic imaging device |
US6841934B2 (en) * | 2003-02-26 | 2005-01-11 | Harvatek Corporation | White light source from light emitting diode |
JP4174823B2 (en) | 2003-03-27 | 2008-11-05 | サンケン電気株式会社 | Semiconductor light emitting device |
US7276782B2 (en) * | 2003-10-31 | 2007-10-02 | Harvatek Corporation | Package structure for semiconductor |
KR100540848B1 (en) * | 2004-01-02 | 2006-01-11 | 주식회사 메디아나전자 | White LED device comprising dual-mold and manufacturing method for the same |
JP2005259972A (en) * | 2004-03-11 | 2005-09-22 | Stanley Electric Co Ltd | Surface-mounting led |
JP2005317661A (en) * | 2004-04-27 | 2005-11-10 | Sharp Corp | Semiconductor light emitting device and its manufacturing method |
JP4359195B2 (en) * | 2004-06-11 | 2009-11-04 | 株式会社東芝 | Semiconductor light emitting device, manufacturing method thereof, and semiconductor light emitting unit |
JP2006093672A (en) * | 2004-08-26 | 2006-04-06 | Toshiba Corp | Semiconductor light emitting device |
JP4608294B2 (en) | 2004-11-30 | 2011-01-12 | 日亜化学工業株式会社 | RESIN MOLDED BODY, SURFACE MOUNTED LIGHT EMITTING DEVICE AND METHOD FOR PRODUCING THEM |
JP4979896B2 (en) * | 2005-04-25 | 2012-07-18 | パナソニック株式会社 | Light emitting device |
JP4991173B2 (en) * | 2005-04-27 | 2012-08-01 | 京セラ株式会社 | Light-emitting element mounting substrate and light-emitting device using the same |
TWI256737B (en) * | 2005-05-19 | 2006-06-11 | Pi-Fu Yang | One-block light-emitting device and manufacturing method thereof |
KR20070000638A (en) * | 2005-06-28 | 2007-01-03 | 삼성전기주식회사 | High brightness light emitting diode and method of manufacturing the same |
DE102006032415A1 (en) * | 2005-09-30 | 2007-04-05 | Osram Opto Semiconductors Gmbh | Method for producing a radiation-emitting component and radiation-emitting component |
US7521728B2 (en) * | 2006-01-20 | 2009-04-21 | Cree, Inc. | Packages for semiconductor light emitting devices utilizing dispensed reflectors and methods of forming the same |
US7808004B2 (en) * | 2006-03-17 | 2010-10-05 | Edison Opto Corporation | Light emitting diode package structure and method of manufacturing the same |
USD563333S1 (en) * | 2006-04-05 | 2008-03-04 | Seoul Semiconductor Co., Ltd. | Light emitting diode (LED) |
KR100735325B1 (en) * | 2006-04-17 | 2007-07-04 | 삼성전기주식회사 | Light emitting diode package and fabrication method thereof |
JP5119621B2 (en) * | 2006-04-21 | 2013-01-16 | 日亜化学工業株式会社 | Light emitting device |
JP2007305785A (en) * | 2006-05-11 | 2007-11-22 | Nichia Chem Ind Ltd | Light emitting device |
TWI338380B (en) * | 2006-10-11 | 2011-03-01 | Chuan Yu Hung | Light emitting diode incorporating high refractive index material |
JP5060172B2 (en) * | 2007-05-29 | 2012-10-31 | 岩谷産業株式会社 | Semiconductor light emitting device |
-
2007
- 2007-12-06 KR KR20070126436A patent/KR101488448B1/en active IP Right Grant
-
2008
- 2008-12-02 JP JP2010536841A patent/JP2011507228A/en not_active Withdrawn
- 2008-12-02 EP EP08857114.6A patent/EP2215667B1/en active Active
- 2008-12-02 US US12/746,447 patent/US20110108866A1/en not_active Abandoned
- 2008-12-02 WO PCT/KR2008/007103 patent/WO2009072786A2/en active Application Filing
- 2008-12-05 TW TW097147391A patent/TWI497746B/en active
-
2013
- 2013-12-27 US US14/142,071 patent/US9698319B2/en active Active
-
2014
- 2014-06-27 US US14/318,125 patent/US20140306257A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002052615A2 (en) | 2000-12-27 | 2002-07-04 | Osram Opto Semiconductors Gmbh | Radiation-emitting semiconductor component with a luminescence conversion element |
US20050245018A1 (en) | 2001-10-31 | 2005-11-03 | Georg Bogner | Optoelectronic component |
US20050093005A1 (en) | 2002-06-28 | 2005-05-05 | Osram Opto Semiconductors Gmbh | Optoelectronic component and method for producing it |
WO2007007959A1 (en) | 2005-07-13 | 2007-01-18 | Seoul Semiconductor Co., Ltd. | Mold for forming a molding member and method of fabricating a molding member using the same |
US20070034886A1 (en) | 2005-08-11 | 2007-02-15 | Wong Boon S | PLCC package with integrated lens and method for making the package |
EP1801893A2 (en) | 2005-12-26 | 2007-06-27 | Kabushiki Kaisha Toshiba | Lens-equipped light-emitting diode device and method of manufacturing the same |
Non-Patent Citations (1)
Title |
---|
See also references of EP2215667A4 |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
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US8716665B2 (en) | 2009-09-10 | 2014-05-06 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Compact optical proximity sensor with ball grid array and windowed substrate |
US8143608B2 (en) | 2009-09-10 | 2012-03-27 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | Package-on-package (POP) optical proximity sensor |
WO2011033404A1 (en) * | 2009-09-17 | 2011-03-24 | Koninklijke Philips Electronics N.V. | Reduced angular emission cone illumination leds |
JP2011077188A (en) * | 2009-09-29 | 2011-04-14 | Toyoda Gosei Co Ltd | Lighting system |
US9733357B2 (en) | 2009-11-23 | 2017-08-15 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Infrared proximity sensor package with improved crosstalk isolation |
CN102456824A (en) * | 2010-10-21 | 2012-05-16 | 展晶科技(深圳)有限公司 | Packaging structure of light emitting diode |
US8674488B2 (en) | 2010-11-02 | 2014-03-18 | Carsem (M) Sdn. Bhd. | Light emitting diode (LED) packages |
US8394675B2 (en) | 2010-11-02 | 2013-03-12 | Carsem (M) Sdn. Bhd. | Manufacturing light emitting diode (LED) packages |
US8314479B2 (en) | 2010-11-02 | 2012-11-20 | Carsem (M) Sdn. Bhd. | Leadframe package with recessed cavity for LED |
US8841597B2 (en) | 2010-12-27 | 2014-09-23 | Avago Technologies Ip (Singapore) Pte. Ltd. | Housing for optical proximity sensor |
WO2013056916A3 (en) * | 2011-10-20 | 2013-06-27 | Osram Gmbh | Pad for a lighting device |
US8535988B2 (en) | 2011-11-01 | 2013-09-17 | Carsem (M) Sdn. Bhd. | Large panel leadframe |
US11444227B2 (en) | 2019-10-01 | 2022-09-13 | Dominant Opto Technologies Sdn Bhd | Light emitting diode package with substrate configuration having enhanced structural integrity |
US11444225B2 (en) | 2020-09-08 | 2022-09-13 | Dominant Opto Technologies Sdn Bhd | Light emitting diode package having a protective coating |
US11329206B2 (en) | 2020-09-28 | 2022-05-10 | Dominant Opto Technologies Sdn Bhd | Lead frame and housing sub-assembly for use in a light emitting diode package and method for manufacturing the same |
Also Published As
Publication number | Publication date |
---|---|
US20140306257A1 (en) | 2014-10-16 |
KR101488448B1 (en) | 2015-02-02 |
WO2009072786A3 (en) | 2009-09-03 |
US20110108866A1 (en) | 2011-05-12 |
US20140110739A1 (en) | 2014-04-24 |
JP2011507228A (en) | 2011-03-03 |
EP2215667B1 (en) | 2019-02-27 |
TW200931691A (en) | 2009-07-16 |
KR20090059538A (en) | 2009-06-11 |
EP2215667A2 (en) | 2010-08-11 |
US9698319B2 (en) | 2017-07-04 |
TWI497746B (en) | 2015-08-21 |
EP2215667A4 (en) | 2012-04-04 |
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