Patent Publication Number: US-8987022-B2

Title: Light-emitting device package and method of manufacturing the same

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the benefit of Korean Patent Applications No. 10-2011-0004528, filed on Jan. 17, 2011 and No. 10-2011-0005984, filed on Jan. 20, 2011, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference. 
     BACKGROUND 
     1. Field 
     The present disclosure relates to light-emitting device packages and methods of manufacturing the same, and more particularly, to light-emitting device packages which may be manufactured using post-molding and with improved heat emission performance and optical quality, and methods of manufacturing the light-emitting device packages. 
     2. Description of the Related Art 
     Light-emitting diodes (LEDs) are semiconductor light-emitting devices that change an electric signal into light by using characteristics of compound semiconductors. Semiconductor light-emitting devices such as LEDs have a longer lifetime than other general luminous bodies, are driven at a low voltage, and have low power consumption. Also, the semiconductor light-emitting devices such as LEDs have excellent response speeds and impact resistance and are small and light in weight. Such a semiconductor light-emitting device may emit lights having different wavelengths depending on the type and composition of a semiconductor used and if necessary, may form lights having other various wavelengths. Currently, lighting lamps using a white light-emitting device having high brightness have been replaced with general fluorescent lamps or incandescent lamps. 
     In order to provide lighting apparatuses using the semiconductor light-emitting devices, a packaging process, which connects a light-emitting device chip to a lead frame and sealed, is required. For example, in a general light-emitting device package, a lead frame, in which a cup-form molding member is pre-mold, is prepared, a light-emitting device chip is attached on the lead frame in the molding member so as to wire bond the light-emitting device chip and the lead frame, a phosphor is filled in the molding member so as to surround the light-emitting device chip, and finally, the molding member is sealed using a lens-form heat emission member. 
     However, in the light-emitting device package manufactured as above, the density of the phosphor is not uniform and thus optical quality deviation may be generated. Also, light emitted through the side of the light-emitting device chip may not be sufficiently used. 
     SUMMARY 
     Provided are light-emitting device packages having reduced optical quality deviation and improved optical efficiency and methods of manufacturing the same. 
     Provided are light-emitting device packages having simple manufacturing process and improved mechanical reliability and methods of manufacturing the same. 
     Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments. 
     According to an aspect of the present invention, a light-emitting device package includes: a heat dissipation pad; a pair of lead frames disposed to be spaced apart from each other at both sides of the heat dissipation pad; a light-emitting device formed on the heat dissipation pad; a molding member for surrounding and fixing the heat dissipation pad and the lead frames; and bonding wires for electrically connecting the lead frames to the light-emitting device, wherein the molding member is formed to surround the entire side of the light-emitting device formed on the heat dissipation pad, and the upper surface of the light-emitting device is exposed to the outside of the molding member at the upper surface of the molding member. 
     A bottom surface of the heat dissipation pad may be exposed to the outside of the molding member at a bottom surface of the molding member. 
     The lead frames may include wire bonding regions connected to the bonding wires and protruded toward the light-emitting device. 
     The wire bonding regions may be exposed to the outside of the molding member at the upper surface of the molding member, and the bottom surfaces of the lead frames may be partially exposed to the outside of the molding member at the bottom surface of the molding member. 
     A level of the upper surface of the molding member may be the same as a level of the upper surfaces of the wire bonding regions, and a level of the bottom surface of the molding member may be the same as a level of the bottom surface of the heat dissipation pad and a level of the bottom surfaces of the lead frames. 
     The lead frames may be bent so that the wire bonding regions adjacent to the light-emitting device are higher than the other portions of the lead frames. 
     Any one of the pair of lead frames disposed to be spaced apart from each other at both sides of the heat dissipation pad may be connected to the heat dissipation pad as a single body. 
     The heat dissipation pad may include a region, on which the light-emitting device is to be disposed, at the center thereof and a width of the heat dissipation pad other than the region, on which the light-emitting device is to be disposed, may be larger than a width of the center, on which the light-emitting device is to be disposed. 
     The light-emitting device package may further include a phosphor layer formed on the upper surface of the light-emitting device. 
     The molding member may be formed to surround the side of the phosphor layer. 
     The level of the upper surface of the molding member may be the same as the level of the upper surface of the light-emitting device, and the phosphor layer formed on the light-emitting device may be formed to be higher than the upper surface of the molding member. 
     The light-emitting device package may further include a lens-form transparent encapsulation member formed on the molding member and the light-emitting device. 
     The lead frames may not be bent and instead be flat, the upper surfaces of the lead frames may be filled in the molding member, and the bottom surfaces of the lead frames may be exposed to the outside of the molding member at the bottom surface of the molding member. 
     The molding member may include openings penetrating the molding member for partially exposing the lead frame to the outside and the bonding wires may be connected to the lead frames through the openings. 
     The molding member may include a white or colored molding material. 
     According to another aspect of the present invention, a method of manufacturing a light-emitting device package includes: disposing a pair of lead frames in parallel at both sides of a heat dissipation pad; disposing a light-emitting device on the heat dissipation pad; forming a molding member to surround the heat dissipation pad and the lead frames; and connecting bonding wires between the light-emitting device and the lead frames, wherein the molding member is formed to surround the entire side of the light-emitting device formed on the heat dissipation pad, and the upper surface of the light-emitting device is exposed to the outside of the molding member at the upper surface of the molding member. 
     The forming of the molding member may include disposing the heat dissipation pad, on which the light-emitting device is attached, and the lead frames in a metal molding member and then the molding member may be formed by transfer molding. 
     The method may further include forming a lens-form transparent encapsulation member on the molding member. 
     In the forming of the molding member, a bottom surface of the heat dissipation pad may be exposed to the outside of the molding member at the bottom surface of the molding member. 
     In the forming of the molding member, the wire bonding regions may be exposed to the outside of the molding member at the upper surface of the molding member, and the bottom surfaces of the lead frames may be partially exposed to the outside of the molding member at the bottom surface of the molding member. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       These and/or other aspects will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which: 
         FIG. 1  is a cross-sectional view schematically illustrating a light-emitting device package according to an embodiment of the present invention; 
         FIG. 2  is a plan view schematically illustrating the light-emitting device package of  FIG. 1 ; 
         FIG. 3  schematically illustrates the form and arrangement of a heat dissipation pad and lead frames included in the light-emitting device package of  FIG. 1 ; 
         FIGS. 4A through 4E  are cross-sectional views schematically illustrating a method of manufacturing the light-emitting device package of  FIG. 1 ; 
         FIG. 5  is a cross-sectional view schematically illustrating a light-emitting device package according to another embodiment of the present invention; 
         FIG. 6  is a cross-sectional view schematically illustrating a light-emitting device package according to another embodiment of the present invention; 
         FIG. 7  is a cross-sectional view schematically illustrating a light-emitting device package according to another embodiment of the present invention; and 
         FIG. 8  is a cross-sectional view schematically illustrating a light-emitting device package according to another embodiment of the present invention. 
         FIGS. 9 through 13  are cross-sectional views illustrating light-emitting device packages according to embodiments of the present invention and modified examples thereof; 
         FIG. 14  is a cross-sectional view (left side) and a plan view (right side) illustrating that a multi-chip is installed in one light-emitting device package according to an embodiment of the present invention; 
         FIGS. 15 through 20  are cross-sectional views sequentially illustrating a method of manufacturing a light-emitting device package, according to an embodiment of the present invention; 
         FIG. 21  is a cross-sectional view trapezoid cross-sections of penetration holes formed in a light-emitting device chip installation area of a lead frame of light-emitting device packages according to embodiments of the present invention; 
         FIG. 22  illustrates grooves formed in a light-emitting device chip installation area of a lead frame of light-emitting device packages according to embodiments of the present invention; 
         FIGS. 23 and 24  are plan views of lead frames used in light-emitting device packages according to embodiments of the present invention; 
         FIG. 25  is cross-sectional views (upper side) and plan views (lower side) illustrating upper side design of a mold in a light-emitting device package according to an embodiment of the present invention, wherein the upper left side of  FIG. 25  is a cross-sectional view cut along a line  18 A- 18 A′ of a lower side thereof and the upper right side of  FIG. 25  is a cross-sectional view cut along a line  18 B- 18 B′ of a lower side thereof. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, a method and apparatus for manufacturing a white light-emitting device according to one or more embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals denote like elements and sizes of each element are exaggerated for clarity. 
       FIG. 1  is a cross-sectional view schematically illustrating a light-emitting device package  100  according to an embodiment of the present invention. Referring to  FIG. 1 , the light-emitting device package  100  may include a heat dissipation pad  101 , a light-emitting device  104  disposed on the heat dissipation pad  101 , a pair of lead frames  102  spaced apart from the heat dissipation pad  101  at both sides of the heat dissipation pad  101 , a molding member  107  formed to surround the heat dissipation pad  101  and the lead frames  103 , and a pair of bonding wires  106  electrically connecting the lead frames  102  and the light-emitting device  104 . Also, the light-emitting device package  100  may further include a hemisphere lens-form transparent encapsulation member  108  disposed above the molding member  107  and the light-emitting device  104 . 
     The light-emitting device  104  may be a semiconductor light-emitting device, for example, a light-emitting diode (LED). The light-emitting device  104  may be fixed on the heat dissipation pad  101  using, for example, an adhesive  103 . Also, a phosphor layer  105  may be further coated on the light-emitting device  104 . The phosphor layer  105  emits white light by being excited by light emitted from the light-emitting device  104 . In this regard, the phosphor layer  105  may be formed by dispersing a type or types of phosphor in a resin according to a predetermined mixture ratio. The type of phosphor dispersed in the resin such as silicon resin or epoxy resin and mixture ratio of the phosphor may be selected according to an emission characteristic of the light-emitting device  104 . The phosphor layer  105  is coated on the entire surface of the light-emitting device  104 , except on electrode regions of the light-emitting device  104  for wire bonding. 
     The heat dissipation pad  101  and the lead frames  102  may be formed of a metal material, such as copper (Cu), having excellent heat conductivity and electric conductivity. As illustrated in  FIG. 1 , the heat dissipation pad  101  and the lead frames  102  are surrounded by the molding member  107 . However, a bottom surface of the heat dissipation pad  101  may be exposed to the outside of the molding member  107  at a bottom surface of the molding member  107 , in order to dissipate heat generated by the light-emitting device  104  to the outside. Also, the lead frames  102  include wire bonding regions  102   a  that are electrically connected to electrodes of the light-emitting device  104  through the bonding wires  106  formed of a material having high conductivity such as gold (Au). The wire bonding regions  102   a  may be exposed to the outside of the molding member  107  for wire bonding with the bonding wires  106 . Accordingly, the bonding wires  106  may be connected to the wire bonding regions  102   a  of the lead frames  102  that are partially exposed at the upper surface of the molding member  107 . 
     Also, the lead frames  102  are connected to an external power source (not shown) and provide a current to the light-emitting device  104 . In order for the lead frames  102  to connect to the external power source, a part of the bottom surfaces of the lead frames  102  may be exposed to the outside of the molding member  107  at the bottom surface of the molding member  107 , as illustrated in  FIG. 1 . For example, a level of the upper surface of the molding member  107  is the same as a level of the upper surfaces of the wire bonding regions  102   a , and a level of the bottom surface of the molding member  107  is the same as a level of the bottom surface of the heat dissipation pad  101  and a level of the part of the bottom surfaces of the lead frames  102 . In this regard, as illustrated in  FIG. 1 , the lead frames  102  may be bent so that the wire bonding regions  102   a  adjacent to the light-emitting device  104  are higher than the other parts of the lead frames  102 . Both end side surfaces of the lead frame  102  may be surrounded by the molding member  107 . 
     The molding member  107  may be formed to surround and fix the heat dissipation pad  101  and the lead frames  102 . Also, the molding member  107  may be formed to surround the sides of the light-emitting device  104  except for the upper surface of the light-emitting device  104 . That is, the upper surface of the light-emitting device  104  may be exposed to the outside of the molding member  107  at the upper side of the molding member  107 . Accordingly, light emitted through the upper surface of the light-emitting device  104  may be guided to the outside of the light-emitting device package  100  through the lens-form transparent encapsulation member  108  without being obstructed by the molding member  107 . The level of the upper surface of the molding member  107  may be higher than that of the upper surface of the light-emitting device  104  and may be the same as a level of the upper surface of the phosphor layer  105 . Accordingly, the molding member  107  may surround the sides of the phosphor layer  105 . 
     In the current embodiment of the present invention, the molding member  107  may be formed of a white color molding material having excellent light reflectivity. For example, the molding member  107  may be formed by mixing a material such as TiO 2  in a molding resin. Since the molding member  107  directly contacts the sides of the light-emitting device  104 , when a molding material having excellent light reflectivity is used, light emitted from the sides of the light-emitting device  104  may be reflected and may be reused. Accordingly, light emission efficiency of the light-emitting device package  100  may be improved. Also, even though light is emitted to the side of the light-emitting device  104 , the phosphor layer  105  may be coated only on the upper surface of the light-emitting device  104  and thus optical quality deviation of the light-emitting device package  100  may be reduced. 
     The encapsulation member  108  may include a transparent silicon resin and may have the form of a hemisphere lens. The encapsulation member  108  may be formed to completely cover the light-emitting device  104  exposed by the molding member  107  and parts of the lead frames  102 . Here, the bonding wires  106  are completely in the encapsulation member  108  and fixed so that the bonding wires  106  may not be cut due to an external shock. 
       FIG. 2  is a plan view schematically illustrating the light-emitting device package  100 . Referring to  FIG. 2 , the lens-form encapsulation member  108  is disposed on the molding member  107 . In  FIG. 2 , the encapsulation member  108  is illustrated as a circular outline. In the encapsulation member  108  represented by the circular outline, the light-emitting device  104  under the phosphor layer  105  is disposed at the center thereof and the wire bonding regions  102   a  of the lead frames  102  are disposed at both sides of the light-emitting device  104 . The bonding wires  106  are connected between the light-emitting device  104  and the wire bonding regions  102   a  of the lead frames  102 . 
       FIG. 3  schematically illustrates the form and arrangement of the heat dissipation pad  101  and the lead frames  102  included in the light-emitting device package  100 . Referring to  FIG. 3 , the heat dissipation pad  101  and the pair of the lead frames  102  disposed at both sides of the heat dissipation pad  101  are illustrated. A region  101   a , on which the light-emitting device  104  is to be disposed, is illustrated at the center of the heat dissipation pad  101  using a dashed square. As illustrated in  FIG. 3 , a width of the heat dissipation pad  101  other than the region  101   a , on which the light-emitting device  104  is to be disposed, is larger than a width of the region  101   a , on which the light-emitting device  104  is to be disposed. Accordingly, the heat dissipation pad  101  has recesses  101   b  at both sides of the center of the heat dissipation pad  101 . An area of the heat dissipation pad  101  may be maximized due to the form of the heat dissipation pad  101  and thus heat dissipation performance may be improved. 
     Also, the lead frames  102  disposed to be parallel at both sides of the heat dissipation pad  101  may include the wire bonding regions  102   a  protruded toward the region  101   a , on which the light-emitting device  104  is to be disposed. The wire bonding regions  102   a  are each extended to the insides of the recesses  101   b  of the heat dissipation pad  101  from the sides of the lead frames  102  and thus face the region  101   a,  on which the light-emitting device  104  is to be disposed. As described above, since the lead frames  102  are bent, the wire bonding regions  102   a  may be formed to be higher than the other portions of the lead frames  102 . In such a structure, the area of the lead frames  102  may be relatively reduced and the area of the heat dissipation pad  101  may be relatively increased so that heat dissipation performance of the heat dissipation pad  101  may be improved. 
     In  FIG. 3 , one heat dissipation pad  101  and the pair of lead frames  102  for manufacturing one light-emitting device package  100  are illustrated. However, actually, a plurality of the heat dissipation pads  101  and a plurality of the lead frames  102  may be connected to each other in the form of 2D matrix by a plurality of tie bars  115 . Accordingly, in such a structure, the light-emitting device package  100  may be mass produced. 
       FIGS. 4A through 4E  are cross-sectional views schematically illustrating a method of manufacturing the light-emitting device package  100 . Referring to  FIG. 4A , the pair of lead frames  102  are disposed at both sides of the heat dissipation pad  101 , as illustrated in  FIG. 3 . Then, as illustrated in  FIG. 4B , the light-emitting device  104  is attached on the heat dissipation pad  101  using the adhesive  103 . Here, the phosphor layer  105  may be previously coated on the light-emitting device  104 . However, the light-emitting device  104  may be attached on the heat dissipation pad  101  and then the phosphor layer  105  may be coated on the light-emitting device  104 . If the light-emitting device  104  may emit white light, the phosphor layer  105  may be omitted. Also, when the light-emitting device package  100  emitting light of a specific color is manufactured, the phosphor layer  105  may not be coated on the light-emitting device  104 . 
     Then, as illustrated in  FIG. 4C , the molding member  107  is formed to surround the heat dissipation pad  101  and the lead frames  102 . For example, the heat dissipation pad  101 , on which the light-emitting device  104  is attached, and the lead frames  102  are disposed in a metal molding member and the molding member  107  may be formed by transferring molding. Here, the wire bonding regions  102   a  of the lead frames  102  and the upper surface of the light-emitting device  104  may be exposed at the upper surface of the molding member  107 , and the bottom surfaces of the lead frames  102  and the heat dissipation pad  101  may be exposed at the bottom surface of the molding member  107 . As described above, the molding member  107  may be formed of a white molding material having excellent light reflectivity. However, when light is not emitted from the side of the light-emitting device  104 , the molding member  107  may be formed of, for example, a colored molding material such as black. Then, as illustrated in  FIG. 4D , the bonding wires  106  are connected between the electrodes of the light-emitting device  104  and the wire bonding regions  102   a . Then, as illustrated in  FIG. 4E , the transparent encapsulation member  108  is formed on the molding member  107 , thereby completing the manufacture of the light-emitting device package  100 . 
     As described above, the light-emitting device package  100  according to the embodiment of the present invention may be manufactured by using post-molding in which the light-emitting device  104  is firstly disposed on the heat dissipation pad  101  and then the molding member  107  is formed on the heat dissipation pad  101  and the lead frames  102 . Accordingly, in the post-molding, a space for positioning the light-emitting device  104  may be saved compared with pre-molding in which a molding member is firstly formed on lead frames or a heat dissipation pad. In this regard, a size of the light-emitting device package  100  may be reduced. When a light-emitting device package is manufactured by using pre-molding and a light-emitting device is disposed on a heat dissipation pad or lead frames later, a sufficient marginal space for disposing the light-emitting device in a molding member needs to be prepared. When the space having the same size as the light-emitting device is prepared, it may be hard to dispose the light-emitting device due to a process error. Accordingly, in pre-molding, waste of space may relatively increase. 
       FIG. 5  is a cross-sectional view schematically illustrating a light-emitting device package  110  according to another embodiment of the present invention. The light-emitting device package  110  of  FIG. 5  is different from the light-emitting device package  100  of  FIG. 1  in that a level of the upper surface of the molding member  107  is the same as a level of the upper surface of the light-emitting device  104  in the light-emitting device package  110 . Accordingly, the phosphor layer  105  coated on the light-emitting device  104  is formed to be higher than the upper surface of the molding member  107 . The other elements of the light-emitting device package  110  of  FIG. 5  are the same as those of the light-emitting device package  100  of  FIG. 1 . 
       FIG. 6  is a cross-sectional view schematically illustrating a light-emitting device package  120  according to another embodiment of the present invention. The light-emitting device package  120  of  FIG. 6  is different from the light-emitting device package  110  of  FIG. 5  in that any one of a pair of lead frames is connected to the heat dissipation pad as a single body in the light-emitting device package  120 . That is, as illustrated in  FIG. 6 , the light-emitting device package  120  may include a first lead frame  111  connected to the heat dissipation pad to perform a heat dissipation function and a general second lead frame  102  that is not connected to the heat dissipation pad. The first lead frame  111  has a wide a heat dissipation area and thus a heat dissipation performance of the first lead frame  111  may be improved. 
       FIG. 7  is a cross-sectional view schematically illustrating a light-emitting device package  130  according to another embodiment of the present invention. The light-emitting device package  130  of  FIG. 7  is different from the light-emitting device package  110  of  FIG. 5  in that flat lead frames  112  are included in the light-emitting device package  130  of  FIG. 7 , instead of the bent lead frames  102 . Since the lead frames  112  are not bent and instead are flat, the upper surfaces of the lead frames  112  are covered by the molding member  107 . Accordingly, for wire bonding, openings  109  penetrating the molding member  107  are formed in some parts of the molding member  107  on the lead frames  112 . The lead frames  112  may be partially exposed to the outside through the openings  109 . The bonding wires  106  may be connected to the lead frames  112  through the openings  109 . In the current embodiment of the present invention, since the structure of the lead frames  112  is simple and thus a cost of manufacturing the lead frames  110  may be reduced. 
       FIG. 8  is a cross-sectional view schematically illustrating a light-emitting device package  140  according to another embodiment of the present invention. The light-emitting device package  140  of  FIG. 8  is different from the light-emitting device package  130  of  FIG. 7  in that any one of a pair of lead frames is connected to the heat dissipation pad in the light-emitting device package  140 . That is, as illustrated in  FIG. 8 , the light-emitting device package  140  may include a first lead frame  121  connected to the heat dissipation pad to perform a heat dissipation function and a general second lead frame  112  that is not connected to the heat dissipation pad. The first lead frame  121  has a wide heat dissipation area and thus a heat dissipation performance of the first lead frame  121  may be improved. 
     In  FIG. 8 , the bonding wires  106  are connected to both the first lead frame  121  and the second lead frame  112 . However, when a light-emitting device  104  having a vertical structure, in which one electrode is each formed on the upper surface and the bottom surface, is used, the bonding wire  106  may be connected only between the second lead frame  112  and the upper surface of the light-emitting device  104 . The lower surface of the light-emitting device  104  may be electrically connected to the first lead frame  121  since the light-emitting device  104  is attached on the first lead frame  121  by using a conductive adhesive or by metal bonding. Then, the bonding wire  106  may not be separately connected to the first lead frame  121 . 
     In order to simplify the manufacturing process and improve the mechanical reliability of the light-emitting device package, it is possible to embody a light-emitting device package having no bonding wire.  FIG. 9  is a cross-sectional view of a light-emitting device package  40  having no bonding wire according to an embodiment of the present invention. 
     Referring to  FIG. 9 , the light-emitting device package  40  includes first and second lead frames  152  and  154  that are spaced apart from each other, a light-emitting device  156 , a fluorescent layer  162 , a lens-form sealing member  164 , a molding member  160 , and flip-chip bonding solders  158 . Any one of the first and second lead frames  152  and  154  may be a P-type electrode and other one may be an N-type electrode. The light-emitting device  156  may include, for example, a light emitting diode (LED) or a laser diode (LD). The light-emitting device  156  includes a P-type electrode and an N-type electrode. The P-type electrode of the light-emitting device  156  corresponds to the first or second lead frame  152  or  154  used as a P-type electrode. The N-type electrode of the light-emitting device  156  corresponds to the first or second lead frame  152  or  154  used as an N-type electrode. The first and second lead frames  152  and  154  and the light-emitting device  156  are flip-chip bonded to each other using the flip-chip bonding solders  158 . The molding member  160  contacts sides of the light-emitting device  156 . The molding member  160  covers the sides of the light-emitting device  156 , fills a space between the light-emitting device  156  and the first and second lead frames  152  and  154 , and fills a space between the first lead frame  152  and the second lead frame  154 . The molding member  160  is a material having high light reflectivity and may be a white or colored molding material. When the molding member  160  is a white material, the molding member may be, for example, TiO 2 . Also, the molding member  160  improves mechanical properties between the light-emitting device  156  and the first and second lead frames  152  and  154  and may be a material having high thermal conductivity. Since the sides of the light-emitting device  156  are covered by the molding member  160 , light emitted from the sides of the light-emitting device  156  may be reflected to the upper part of the light-emitting device  156  and may be emitted in the same direction as a direction of light emitted from a light emission surface of an upper surface of the light-emitting device  156 . Accordingly, since the amount of light emitted from the light-emitting device  156  may increase, brightness of the light-emitting device package  40  may increase. An upper surface of the molding member  160  is higher than the upper surface of the light-emitting device  156 . The molding member  160  includes a downward inclination surface  160 S 1  from the inner edge of the molding member  160  to the edge of the upper surface of the light-emitting device  156 . Since the upper surface of the molding member  160  is higher than the upper surface of the light-emitting device  156 , the inside of the upper surface of the molding member  160  may be a concave region. The bottom of the concave region may be the upper surface of the light-emitting device  156 . The upper surface of the light-emitting device  156  is covered by the fluorescent layer  162  having a uniform thickness. An upper surface of the fluorescent layer  162  is lower than the upper surface of the molding member  160 . The fluorescent layer  162  may be a resin layer including a phosphor. The phosphor may be one type or plural types of phosphors. The resin layer may be, for example, a silicon layer. The convex lens-form transparent sealing member  164  covers the fluorescent layer  162  and the downward inclination surface  160 S 1  of the molding member  160  and partially covers the upper surface of the molding member  160 . The sealing member  164  may include, for example, heat-resistant epoxy or silicon. 
       FIG. 10  is a cross-sectional view of a light-emitting device package  50  according to another embodiment of the present invention. 
     Referring to  FIG. 10 , in the light-emitting device package  50 , the first and second lead frames  152  and  154  each include a plurality of penetration holes  166  each filled with fillers  168 . The plane form of the penetration holes  166  may be a circle, an oval, or a polygon, for example, a square. The cross-section of the penetration holes  166  may be a trapezoid or a square, as illustrated in  FIG. 21 . The inner surface of the penetration holes  166  may be a curved surface, instead of a plane. Also, instead of the penetration holes  166 , grooves  200  may be formed in the first and second lead frames  152  and  154 , as illustrated in  FIG. 22 . The flip-chip bonding solders  158  are between the light-emitting device  156  and the fillers  168  and contact both the light-emitting device  156  and the fillers  168 . A filler  168  may be a material having conductivity and an adhesive property. The filler  168  may be, for example, solder paste and may be polymer including a nano-sized metal, for example, epoxy including silver (Ag). In the epoxy including silver (Ag), the amount of silver (Ag) may be greater than 0 and may be 90 wt % at maximum. The other elements of the light-emitting device package  50  may be the same as those of the light-emitting device package  40  and thus a description thereof is omitted. In the light-emitting device package  50 , the first and second lead frames  152  and  154  and the flip-chip bonding solders  158  are not simply surface-contact as in the light-emitting device package  40  and instead the fillers  168  are inserted into the first and second lead frames  152  and  154 . Accordingly, the adhesive strength between the first and second lead frames  152  and  154  and the light-emitting device  156  may increase. 
       FIG. 11  is a cross-sectional view of a light-emitting device package  60  according to another embodiment of the present invention 
     In the light-emitting device package  60 , the flip-chip bonding solders  158  may be gold stud bumps  170 , as illustrated in  FIG. 11 . When the flip-chip bonding solders  158  are the gold stud bumps  170 , protrusion portions of the gold stud bumps  170  are stuck to the penetration holes  166  formed in the first and second lead frames  152  and  154 . Accordingly, the adhesive strength between the light-emitting device  156  and the first and second lead frames  152  and  154  may increase. 
       FIG. 12  is a cross-sectional view of a light-emitting device package  70  according to another embodiment of the present invention. 
     Referring to  FIG. 12 , instead of the flip-chip bonding solders  158 , first and second metal bonding layers  176  and  178  are between the first and second lead frames  152  and  154  and the light-emitting device  156 . The first and second metal bonding layers  176  and  178  may be adhesive layers having electric conductivity. The first and second lead frames  152  and  154  widely contact the light-emitting device  156  through the first and second metal bonding layers  176  and  178 , respectively. The contact surface between the first and second lead frames  152  and  154  and the light-emitting device  156  may be larger than that of in the light-emitting device packages  50  and  60 . In the light-emitting device package  70 , since the bonding surface between the light-emitting device  156  and the first and second lead frames  152  and  154  is large, the adhesive strength therebetween may increase and heat emission may be efficient. 
     In the light-emitting device package  70  of  FIG. 12 , flip-chip bonding using solders, instead of the first and second metal bonding layers  176  and  178 , may be performed. 
       FIG. 13  is a cross-sectional view of a light-emitting device package  80  according to another embodiment of the present invention. 
     Referring to  FIG. 13 , the first and second lead frames  152  and  154  are in the molding member  160 . That is, similar to the light-emitting device  156 , the sides of the first and second lead frames  152  and  154  are covered by the molding member  160 . Consequently, the first and second lead frames  152  and  154  are covered by the molding member  160  except for the bottom surfaces thereof. Accordingly, since the contact surface of the first and second lead frames  152  and  154  and the molding member  160  increases, mechanical bonding reliability between the first and second lead frames  152  and  154  and the molding member  160  may increase. In  FIG. 13 , the bottom surfaces of the first and second lead frames  152  and  154  are connected to a power source (not shown). 
       FIG. 14  is a cross-sectional view (left side) and a plan view (right side) illustrating that a plurality of light-emitting device, that is, a multi-chip, is installed in one light-emitting device package according to an embodiment of the present invention. In  FIG. 14 , the left side view is a cross-sectional view cut along a line  7 - 7 ′ of the right side view. 
     Referring to  FIG. 14 , first through fourth light-emitting device  190 ,  192 ,  194 , and  196  are installed on first through third lead frames  182 ,  184 , and  186 . The first through third lead frames  182 ,  184 , and  186  and the first through fourth light-emitting device  190 ,  192 ,  194 , and  196  may be bonded to each other in the same manner as described with respect to  FIG. 10  or  11 . Accordingly, the first through fourth light-emitting device  190 ,  192 ,  194 , and  196  may be firmly installed on the first through third lead frames  182 ,  184 , and  186 . In  FIG. 14 , four light-emitting device, namely, the first through fourth light-emitting device  190 ,  192 ,  194 , and  196 , are installed in one package; however, the number of light-emitting device chips may be greater than or equal to 4 or less than or equal to 4. The first and second lead frames  182  and  184  may be the same electrodes, for example, p-type electrodes. The third lead frame  186  may be, for example, an N-type electrode. A concave area  160 A 1  of the molding member  160  is a square. The concave area  160 A 1  may be a circle circumscribed around the fluorescent layer  162  that covers the first through fourth light-emitting device  190 ,  192 ,  194 , and  196  or may have other forms. The first through fourth light-emitting device  190 ,  192 ,  194 , and  196  are installed in the concave area  160 A 1  of the molding member  160 . The first through fourth light-emitting device  190 ,  192 ,  194 , and  196  are installed in a lattice arrangement form. The relationship between the first through fourth light-emitting device  190 ,  192 ,  194 , and  196  and the molding member  160  may be the same as described with reference to  FIGS. 9 through 13 . The first through fourth light-emitting device  190 ,  192 ,  194 , and  196  and the first through third lead frames  182 ,  184 , and  186  may be bonded to each other in the same manner as described with respect to  FIG. 12 . In  FIG. 14 , the first through third lead frames  182 ,  184 , and  186  are covered by the molding member  160  except for the bottom surfaces thereof. However, the sides of the first and second lead frames  182  and  184  may be exposed outside of the molding member  160 . It is not hard to form a light-emitting device package having various structures by combining the light-emitting device packages of  FIGS. 9 through 14 . Accordingly, examples of other light-emitting device packages except for the light-emitting device packages described above are omitted. 
     A method of manufacturing a light-emitting device package, according to an embodiment of the present invention, is described with reference to  FIG. 15 . 
     Referring to  FIG. 15 , the first and second lead frames  152  and  154  are prepared. A plurality of holes  152   h  are formed in the first and second lead frames  152  and  154 . The plane form of the holes  152   h  may be a circle, non-circle, or square. When the plane form of the holes  152   h  is a circle, a diameter of the hole  152   h  may be, for example, greater than 0 and less than or equal to 150 μm. When the plane form of the holes  152   h  is a quadrangle, the horizontal and vertical breadths of the hole  152   h  may be, for example, greater than 0 and less than or equal to 170 μm and greater than 0 and less than or equal to 100 μm, respectively. The cross-section of the holes  152   h  may be different from those illustrated in  FIG. 15  and may be, for example, a trapezoid as illustrated in  FIG. 21 . Also, grooves  200  having predetermined depths may be instead formed at locations of the holes  152   h  of the first and second lead frames  152  and  154 , as illustrated in  FIG. 22 . 
     Then, as illustrated in  FIG. 16 , the holes  152   h  are filled with conductive materials  168 , respectively. The conductive materials  168  may be solder paste or polymers including a nano-sized metal. 
     For flip-chip bonding, the light-emitting device  156 , including the flip-chip bonding solders  158 , are disposed on the first and second lead frames  152  and  154 , as illustrated in  FIG. 17 . The flip-chip bonding solders  158  contact a P-type electrode and an N-type electrode (not illustrated) of the light-emitting device  156 . The flip-chip bonding solders  158  of the light-emitting device  156  correspond to the holes  152   h  of the first and second lead frames  152  and  154  one-to-one. As such, when the light-emitting device  156  and the first and second lead frames  152  and  154  are disposed on each other, the light-emitting device  156  lowers so that the conductive materials  168  filled in the holes  168   h  of the first and second lead frames  152  and  154  are flip-chip bonded to the flip-chip bonding solders  158  of the light-emitting device  156 , respectively. 
     Then, as illustrated in  FIG. 18 , the molding member  160 , covering the sides of the light-emitting device  156 , is formed on the first and second lead frames  152  and  154 . The molding member  160  is formed not only between the first lead frame  152  and the second lead frame  154  but also between the bottom surface of the light-emitting device  156  and upper surfaces of the first and second lead frames  152  and  154 . Accordingly, a space between the flip-chip bonding solders  158  is filled with the molding member  160 . When forming the molding member  160 , an upper surface  160 S 2  of the molding member  160  is higher than an upper surface  158 S 2  of the light-emitting device  156 . Accordingly, a part where the light-emitting device  156  is formed is a concave region of the molding member  160 . Also, the molding member  160  is formed to have the downward inclination surface  160 S 1  between the upper surface  160 S 2  and the edge of the upper surface  158 S 2  of the light-emitting device  156 . The downward inclination surface  160 S 1  may be a downward inclination surface from the inner edge of the upper surface  160 S 2  of the molding member  160  and to the edge of the upper surface of the light-emitting device  156 . Since the downward inclination surface  160 S 1  is formed as part of the molding member  160 , an emission angle of light emitted from the light-emitting device  156  may increase. That is, a viewing angle of the light-emitting device  156  may increase. 
     Then, as illustrated in  FIG. 19 , the fluorescent layer  162 , covering the upper surface  158 S 2  of the light-emitting device  156 , is formed on the concave portion of the molding member  160 . The fluorescent layer  162  is formed only on the upper surface  158 S 2  of the light-emitting device  156 , and the upper surface  158 S 2  of the light-emitting device  156  is flat so that the fluorescent layer  162  may have a uniform thickness. The fluorescent layer  162  may be a resin layer including one type or plural types of phosphors, and may be, for example, a silicon resin layer. 
     The fluorescent layer  162  may be formed prior to forming of the molding member  160 . For example, the fluorescent layer  162  may be formed on the light-emitting device  156  prior to flip-chip bonding of the light-emitting device  156  and the first and second lead frames  152  and  154 . 
     Then, as illustrated in  FIG. 20 , the lens-form sealing member  164  may be formed to cover the fluorescent layer  162 . The sealing member  164  may be a flat board having a uniform thickness, instead of having a lens-form. The sealing member  164  may be formed to cover the downward inclination surface  160 S 1  of the molding member  160  and partially cover the upper surface  160 S 2  of the molding member  160 . The sealing member  164  may include, for example, silicon or heat-resistant epoxy. 
     As illustrated in  FIG. 14 , when a plurality of light-emitting device chips, namely the first through fourth light-emitting device  190 ,  192 ,  194 , and  196 , are included in one package, the light-emitting device package may be manufactured as described with reference to  FIGS. 15 through 20  except that three lead frames, namely, the first through third lead frames  182 ,  184 , and  186  that are spaced apart from each other, are used. 
       FIGS. 23 and 24  are plan views of lead frames  210  and  310  used in light-emitting device packages according to embodiments of the present invention. 
     For convenience of description, in  FIGS. 23 and 24 , only six unit lead frames  205  are included in the lead frames  210  and  310 , respectively, in two rows and three columns; however, few tens or few hundreds of unit lead frames  205  may be included in the lead frames  210  and  310 , respectively. A bump contact area  216  is at the center of each of the unit lead frame  205 . The bump contact area  216  includes a plurality of holes  218 . The plurality of holes  218  are filled with the conductive materials and correspond to solders of a light-emitting device chip, respectively. 
     In the lead frame  100  of  FIG. 23 , the unit lead frames  205  that are disposed vertically are simultaneously molded. That is, two unit lead frames  205  in a vertical direction are molded at once. In  FIG. 23 , horizontal and vertical lines  203  and  207  are cutting lines for separating the lead frame  210  into each unit lead frame  205 . A dashed line  209  located inside the cutting lines  203  and  207  represents a molding area and a molding member is formed inside the dashed line  209 . Accordingly, in  FIG. 23 , in each cut unit lead frame  205 , edges thereof are partially exposed to the outside of the molding member  160  as in  FIGS. 9 ,  10 , and  11 . In  FIGS. 23 and 24 , reference numeral  212  indicates slots formed at boundaries of each unit lead frame  205  and reference numeral  214  indicates a tie bar. The slots  212  may facilitate cutting. The tie bar  214  fixes each unit lead frame  205  to the lead frame  210  during molding. 
     In the lead frame  310  of  FIG. 24 , the edges of each unit lead frame  205  are located inside of the molding member  160 , as illustrated in  FIG. 13 . In the lead frame  310  of  FIG. 24 , the entire lead frame  310 , to which light-emitting device (not illustrated) is installed, is molded during a molding process, is cut along the cutting lines  203  and  207 , and thereby separated into each unit lead frame  205 . Accordingly, a unit light-emitting device package is formed. 
     As illustrated in  FIG. 14 , when a plurality of light-emitting devices are included in one package, the used lead frames may be the same as those of  FIG. 23  or  24  except that each unit lead frame  205  of  FIG. 23  or  24  constitute three lead frame parts. In  FIG. 23  or  24 , the unit lead frame  205  constitutes two lead frame parts. 
       FIG. 25  is cross-sectional views (upper side) and plan views (lower side) illustrating upper side design of the molding member  160  in a light-emitting device package according to an embodiment of the present invention, wherein the upper left side of  FIG. 25  is a cross-sectional view cut along a line  18 A- 18 A′ of a lower side thereof and the upper right side of  FIG. 25  is a cross-sectional view cut along a line  18 B- 18 B′ of a lower side thereof. 
     The left side of  FIG. 25  illustrates that a plane form of a concave region  160 A 2  of the molding member  160  is a circle circumscribed the edge of the light-emitting device  156 . Here, the surface of the concave region  160 A 2  of the molding member  160  has the same height as the surface of the fluorescent layer  162 . The lower right side of  FIG. 25  illustrates that a plane form of a concave region of the molding member  160  is a square as in the light-emitting device  156 . Here, the area of the concave region of the molding member  160  may be the same as the light-emitting device  156 . 
     It should be understood that the exemplary embodiments described therein should be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects within each embodiment should typically be considered as available for other similar features or aspects in other embodiments.