Patent Publication Number: US-2018040789-A1

Title: Light-emitting device and camera module having same

Description:
TECHNICAL FIELD 
     Embodiments relate to a light-emitting device and a camera module having the same. 
     BACKGROUND ART 
     Light-emitting devices, for example, light emitting diodes are a type of semiconductor devices that convert electrical energy into light and are being popularized as next-generation light sources in place of existing fluorescent and incandescent lamps. 
     Since light emitting diodes generate light by using semiconductor devices, the light emitting diodes consume very low power as compared with incandescent lamps that generate light by heating tungsten or fluorescent lamps that allow ultraviolet rays generated through a high pressure discharge to collide with a phosphor to generate light. 
     In recent years, kinds of portable devices with camera functions are increasing. Such a portable device includes a flash to provide an amount of light, which needs for capturing an image at night. In this regard, white light emitting diodes (LEDs) are increasing in use as light sources of camera flashes. Currently, there are two methods of using a light-emitting diode as a light source of a camera flash, i.e., a method using a reflector and an external cover having a reflective surface with high reflexibility, which is designed to match a radiation angle of the light-emitting diode with a view angle of a camera and a method in which a flash lens and a structure for fixing the flash lens are integrated with a light-emitting diode package. 
     The needs of the flash for the light-emitting diodes are increasing. 
     DISCLOSURE OF THE INVENTION 
     Technical Problem 
     Embodiments provide a light-emitting device having a reflective frame opening a light-emitting chip on a body. 
     Embodiments also provide a light-emitting device in which an inclination of a corner region of a side surface of an opening portion of a reflective frame opening a light-emitting chip is greater than that in a different axial direction. 
     Embodiments also provide a camera module in which an illuminance in a diagonal direction is improved by light emitted through an opening portion of a reflective frame of a light-emitting device. 
     Technical Solution 
     A light-emitting device according to an embodiment includes: a body; a plurality of lead frames on the body; a light-emitting chip disposed on at least one of the plurality of lead frames and electrically connected to the plurality of lead frames; and a reflective frame having an opening portion for opening an upper portion of the light-emitting chip and disposed on the body, wherein the light-emitting chip includes a first side surface, a second side surface adjacent to the first side surface, and a corner region between the first and second side surfaces, an inner surface disposed around the opening portion of the reflective frame includes a first reflective region adjacent to the first side surface of the light-emitting chip, a second reflective region adjacent to the second side surface of the light-emitting chip, and a third reflective region adjacent to the edge of the light-emitting chip, and the third reflective region has an inclination greater than that of each of the first and second reflective regions. 
     A camera module according to an embodiment includes an optical lens disposed on an opening portion of a reflective frame of the light-emitting device. 
     Advantageous Effects 
     In the embodiments, the illuminance of the edge portion of the target screen may be improved by the light emitted from the light-emitting device. 
     In the embodiments, the difference between the central illuminance of the screen and the illuminance in the outer region may be reduced by the light-emitting device. 
     In the embodiments, the light-emitting device and the camera module having the same may be improved in optical reliability. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a camera module according to an embodiment. 
         FIG. 2  is a plan view illustrating a light-emitting device of the camera module of  FIG. 1 . 
         FIG. 3  is a perspective of the light-emitting device of  FIG. 2 . 
         FIG. 4  is a cross-sectional view taken along line A-A in the light-emitting device of  FIG. 2 . 
         FIG. 5  is a cross-sectional view taken along line B-B in the light-emitting device of  FIG. 2 . 
         FIG. 6  is a detailed view illustrating an opening portion of a reflective frame of the light-emitting device of  FIG. 2 . 
         FIGS. 7 and 8  are detailed plan views of the opening portion of  FIG. 6 . 
         FIG. 9  is a view of a screen in the camera module according to an embodiment. 
         FIG. 10  is a view illustrating another example of the light-emitting device of the camera module of  FIG. 1 . 
         FIG. 11  is a view illustrating another example of the light-emitting device of the camera module of  FIG. 1 . 
         FIG. 12  is a side cross-sectional of the light-emitting device of  FIG. 11 . 
         FIG. 13  is a view illustrating a first example of a light-emitting chip of the light-emitting device according to an embodiment. 
         FIG. 14  is a view illustrating a first example of the light-emitting chip of the light-emitting device according to an embodiment. 
         FIG. 15  is a view illustrating a third example of the light-emitting chip of the light-emitting device according to an embodiment. 
         FIGS. 16A and 16B to 22A and 22B  are views illustrating illuminance distribution and brightness at a center by samples of the light-emitting device according to an embodiment. 
     
    
    
     MODE FOR CARRYING OUT THE INVENTION 
     In the description of embodiments, it will be understood that when a layer (or film), region, pattern or structure is referred to as being ‘on’ or ‘under’ another layer (or film), region, pad or pattern, the terminology of ‘on’ and ‘under’ includes both the meanings of ‘directly’ and ‘indirectly’. Further, the reference about ‘on’ and ‘under’ each layer or structure will be made on the basis of drawings. 
       FIG. 1  is a perspective view of a camera module according to an embodiment,  FIG. 2  is a plan view illustrating a light-emitting device of the camera module of  FIG. 1 ,  FIG. 3  is a perspective of the light-emitting device of  FIG. 2 ,  FIG. 4  is a cross-sectional view taken along line A-A in the light-emitting device of  FIG. 2 ,  FIG. 5  is a cross-sectional view taken along line B-B in the light-emitting device of  FIG. 2 ,  FIG. 6  is a detailed view illustrating an opening portion of a reflective frame of the light-emitting device of  FIG. 2 , and  FIGS. 7 and 8  are detailed plan views of the opening portion of  FIG. 6 . 
     Referring to  FIGS. 1 to 9 , a camera module includes a light-emitting device  400  and a camera  405 , which are disposed on a circuit board  401 , and the light-emitting device  400  is disposed adjacent to the camera  405  on the circuit board  401 . 
     The circuit board  401  may include a PCB, a metal core PCB (MCPCB) or a flexible PCB (FPCB), which is made of a resin material, but is not limited thereto. 
     The light-emitting device  400  may be disposed on a circuit pattern of the circuit board  401  and electrically connected to the circuit board  401 . An optical lens (not shown) may be coupled to the light-emitting device  400 , but is not limited thereto. The optical lens may be coupled in a region of an opening portion (see reference numeral  445  of  FIG. 2 ) of the light-emitting device  400  or disposed on the opening portion (see reference numeral  445  of  FIG. 2 ). 
     The light-emitting device  400  may be mounted on the circuit board  401  in the form of a chip or mounted in the form of a package in which a chip is packaged. The light-emitting device according to an embodiment will be described as an example of a light-emitting device that will be described below. 
     Referring to  FIG. 2 , the light-emitting device  400  include a body  410 , a plurality of lead frames  421  and  431  of which at least a portion is coupled to the body  410 , a light-emitting chip  450  disposed on at least one of the plurality of lead frames  421  and  431 , and a reflective frame  440  disposed on the body  410 . 
     At least two lead frames  421  and  431  may be coupled to the body  410 , and the light-emitting chip  450  may be disposed on the at least two lead frames  421  and  431 . 
     The body  410  may be made of a material having reflectivity greater than a refractive index thereof, for example, a material having reflectivity of 70% or more with respect to a wavelength emitted by the light-emitting chip  450 . The reflectivity of the body  410  is above 70%, the body  410  may be made of a non-transmissive material. The body  410  may be made of a resin-based insulation material, for example, a resin material such as of polyphthalamide (PPA). The body  410  may be made of a thermosetting resin including a silicon-based material, an epoxy-based material, or a plastic material, or a material having high heat resistance and high light resistance. The silicon-based body  410  is made of a white-based resin. Also, an acid anhydride, an antioxidant, a release agent, a light reflector, an inorganic filler, a curing catalyst, a light stabilizer, a lubricant, and titanium dioxide may be selectively added to the body  410 . The body  410  may be molded by using at least one kind of material selected from the group consisting of an epoxy resin, a modified epoxy resin, a silicone resin, a modified silicone resin, an acrylic resin, and a urethane resin. For example, an epoxy resin composed of triglycidylisocyanurate, hydrogenated bisphenol A diglycidyl ether and the like, and an acid anhydride composed of hexahydrophthalic anhydride and 3-methylhexahydrophthalic anhydride, 4-methylhexahydrophthalic anhydride may be added to an epoxy resin by using DBU (1,8-Diazabicyclo (5,4,0) undecene-7) as a curing accelerator and ethylene glycol, titanium oxide pigment and glass fiber as a cocatalyst to partially cure the mixture through heating, and thereby to obtain a B-staged solidified epoxy resin composition for forming the body  410 , but is not limited thereto. The body  410  may be formed by appropriately mixing at least one kind of material selected from the group consisting of a diffusing agent, a pigment, a fluorescent material, a reflective material, a light shielding material, a light stabilizer, and a lubricant with the thermosetting resin. 
     The body  410  may be made of a reflective material, for example, a resin material in which metal oxide is added to a resin material such as epoxy or silicone, and the metal oxide may include at least one of TiO 2 , SiO 2 , and A 1   2 O 3 . The body  410  may effectively reflect incident light. For another example, the body  410  may be made of a transparent resin material or a resin material having a phosphor for converting a wavelength of incident light. 
     The body  410  may include a plurality of outer surfaces, for example, at least four side surfaces  411 ,  412 ,  413 , and  414 . At least one or all of the plurality of side surfaces  411 ,  412 ,  413 , and  414  may be disposed to be tilted with respect to a bottom surface of the body  410  or horizontal bottom surfaces of the lead frames  421  and  431 . Referring to the first to fourth side surfaces  411 ,  412 ,  413 , and  414  of the body  410 , the first side surface  411  and the second side surface  412  are disposed at opposite sides, and the third side surface  413  and the fourth side surface  414  are disposed at opposite sides. Each of the first side surface  411  and the second side surface  412  has a length Y 1  equal to or different from a length X 1  of each of the third side surface  413  and the fourth side surface  414 . For example, each of the first side surface  411  and the second side surface  412  may have a length Y 1  equal to or greater than a length X 1  of each of the third side surface  413  and the fourth side surface  414 . Each of the first side surface  411  and the second side surface  412  may be defined as a long side surface having a length greater than that of each of the third and fourth side surfaces  413  and  414 , and each of the third and fourth side surfaces  413  and  414  may be defined as a short side surface having a length less than that of each of the first and second side surfaces  411  and  412 . 
     The length Y 1  of the first side surface  411  or the second side surface  412  may be a distance between the third side surface  413  and the fourth side surface  414 . 
     An edge portion that is a boundary between the first to fourth side surfaces  411 ,  412 ,  413 , and  414  may have an angled surface or curved surface, but is not limited thereto. The length of the body  410  may be a length in a first axis (X) direction and also a length of each of the short side surfaces that is the length X 1  of each of the third and fourth side surfaces  413  and  414 . The length of the body  410  may be a width in a second axis (Y) direction and also a length of each of the long side surfaces that is the length Y 1  of each of the third and fourth side surfaces  413  and  414 . The first and second axes (X and Y) directions may be perpendicular to each other. 
     The body  410  includes a cavity  415 . The cavity  415  may be provided in a shape in which the inside of the body  410  is recessed from a top surface thereof. A plurality of lead frames  421  and  431  may be exposed in the cavity  415 . 
     Guide protrusions  418  and  419  are disposed around an upper portion of the body  410 . The guide protrusions  418  and  419  may guide insertion of the reflective frame  440  to prevent the reflective frame  440  from horizontally moving. The guide protrusions  418  and  419  may be disposed to be spaced apart from each other and include a first guide protrusion  418  and a second guide protrusion  419 . The first guide protrusion  418  may extend upward from the third side surface  413  of the body  410  up to a portion above the first and second side surfaces  411  and  412 . The second guide protrusion  419  may extend upward from the fourth side surface  414  of the body  410  up to a portion above the first and second side surfaces  411  and  412 . The top surfaces of the first and second guide protrusions  418  and  419  may be the top surface of the body  410 . 
     A hook protrusion  417  is disposed around an upper portion of the cavity  415 . The hook protrusion  417  may have a structure that is stepped from each of the guide protrusions  418  and  419  of the body  417 , for example, have a stair-type structure, a tilted structure, or a curved structure. The hook protrusion  417  functions as a support part supporting the reflective frame  440 . The hook protrusion  417  is disposed more adjacent to the top surface of the body  410  than the bottom of the cavity  415 . 
     Referring to  FIGS. 2 to 5 , a first lead frame  421  may be disposed in a first region on the bottom of the cavity  415  of the body  410 . As illustrated in  FIG. 5 , a protrusion  425  of the first lead frame  421  may protrude outward from the first side surface  411  of the body  410 . A second lead frame  431  may be disposed in a second region on the bottom of the cavity  415 . As illustrated in  FIG. 5 , a protrusion  435  of the second lead frame  435  may protrude outward from the second side surface  412  of the body  410 . The protrusions  425  and  435  of the first and second lead frames  421  and  431  may increase a contact area and a heat dissipation area to improve solder bonding and heat dissipation. 
     Stepped structures  422  and  423  may be provided on a lower portion of the first lead frame  421  as illustrated in  FIG. 4 . The stepped structures  422  and  423  may enhance coupling force with the body  410 . 
     Stepped structures  424  and  434  may be provided on upper portions of the first and second lead frames  421  and  431  as illustrated in  FIG. 5 . The stepped structures  424  and  434  may enhance coupling force with the body  410 . 
     Also, at least one hole (not shown) may be defined in each of the first and second lead frames  421  and  431 . A portion of the body  410  may be coupled to the hole. 
     Each of the lead frames  421  and  431  may include a metal material, for example, at least one of titanium (Ti), copper (Cu), nickel (Ni), gold (Au), chrome (Cr), tantalum (Ta), platinum (Pt), tin (Sn), silver (Ag), and phosphorous (P) and be provided as a single metal layer or a multilayered metal layer. The lead frames  421  and  431  may have the same thickness. Each of the lead frames  421  and  431  may function as a terminal for supplying power. 
     The reflective frame  440  may be disposed on the body  410 . The reflective frame  440  may be disposed to overlap an upper side of a region of the cavity  415 . The reflective frame  440  may be disposed on the first and second lead frames  421  and  431 . The reflective frame  440  may be disposed to vertically overlap the first and second lead frames  421  and  431  in the region of the cavity  415 . 
     An adhesion member  460  may be disposed between the reflective frame  440  and the body  410 . The adhesion member  460  allows the reflective frame  440  to adhere to the cavity  415  of the body  410 . The adhesion member  460  may include an adhesive such as silicon or epoxy. The adhesion member  460  may be made of the same material as the body  410 . A portion of the reflective frame  460  may come into direct contact with the body  410 . The adhesion member  460  may be omitted, but is not limited thereto. 
     The reflective frame  440  may be made of a metal material. The reflective layer  440  may be made of at least one of Ag, Ni, Al, Rh, Pd, Ir, Ru, Mg, Zn, Pt, Cu, Au, Hf or an alloy selected from the materials. The reflective frame  440  may be made of a non-metal material having reflectivity higher than that of the body  410 . The reflective frame  440  may be made of the same material as the body, e.g., a material having reflectivity higher than that of the body  410 . The light reflectivity of the reflective frame  440  may be greater than that of the body  410 . 
     As illustrated in  FIGS. 4 and 5 , the reflective frame  440  includes at least one opening portion  445  through which light is emitted. The opening portion  445  may vertically overlap at least one light-emitting chip  450 . The opening portion  445  may be a hole vertically passing through a top surface of the light-emitting chip  450 . The opening portion  445  may have a rhombus shape having a polygonal shape, a circular shape, an oval shape, or a curved shape in a shape of an upper portion thereof and a polygonal shape having a polygonal shape, a circular shape, an oval shape, or a curved shape in a shape of a lower portion thereof. 
     The opening portion  445  may be defined along a periphery of the light-emitting chip  450  to open an upper portion of the light-emitting chip  450 . The opening portion  445  may be a region through which light emitted from the light-emitting chip  450  is emitted. 
     The opening portion  445  may have a side surface  442  that is disposed adjacent to the light-emitting chip  450  downward. The side surface  442  of the opening portion  445  may be a tilted surface. The tilted surface may have a linear shape in which a line connecting an upper end to a lower end of the opening portion  445  is horizontal or a concavely or convexly curved shape. The side surface  442  of the opening portion  445  may have the tiled surface that is a curved or flat surface. 
     The side surface  442  of the opening portion  445  of the reflective frame  440  may be disposed around each of the light-emitting chips  450 . The lower end  441  of the opening portion  445  may be disposed at a position lower than that of the top surface of the light-emitting chip  450 . For example, the lower end  441  of the opening portion  445  may be disposed at a position lower than that of an active layer (see reference numeral  317  of  FIG. 13 ) of the light-emitting chip  450 . Thus, the side surface  442  of the opening portion  445  of the reflective frame  440  may effectively reflect light emitted from the active layer. 
     As illustrated in  FIG. 4 , the lower end  441  of the side surface of the opening portion  445  may be spaced a predetermined distance G 1  from the top surface of each of the first and second lead frames  421  and  431 . For example, the lower end  441  of the side surface of the opening portion  445  may be spaced a distance G 1 , i.e.,  50  gni or more, e.g., a range of 80 μm to 150 μm from the first lead frame  421 . When the lower end  441  of the side surface of the opening portion  445  is disposed to a distance less than the above-described range, the opening portion  445  may electrically interfere with the first and second lead frames  421  and  431 . On the other hand, when the lower end  441  of the side surface of the opening portion  445  is disposed to a distance greater than the above-described range, light loss may occur. 
     The lower end  441  of the side surface of the opening portion  445  may be spaced a predetermined distance G 2  from the light-emitting chip  450 . For example, the lower end  441  of the side surface of the opening portion  445  may be spaced a predetermined distance G 2 , i.e., 80 μm or more, e.g., a range 90 μm to 120 μm from the light-emitting chip  450 . When the distance G 2  between the lower end  441  of the side surface of the opening portion  445  and the light-emitting chip  450  is less than the above-described range, it may be difficult to secure a process error when the light-emitting chip  450  is mounted. On the other hand, when the distance G 2  is greater than the above-described range, the opening portion  445  may increase in size to cause insignificant improvement in light extraction efficiency. 
     The opening portion  445  of the reflective frame  440  may a bottom surface area greater than a top surface area of the light-emitting chip  450  and less than a top surface area of the first lead frame  421  exposed to the cavity  415 . The opening portion  445  may have a bottom surface area less than a top surface area thereof. 
     A width of the bottom surface of the opening portion  445  in the first axis (X) direction may be grater than that of the top surface of the light-emitting chip  450  in the first axis (X) direction and less than that of the top surface of the first lead frame  421  exposed to the cavity  415  in the first axis (X) direction. 
     A stopping protrusion  447  may be disposed on outer periphery of the reflective frame  440 . The stopping protrusion  447  may extend or protrude upward from the hook protrusion  417  of the body  410 . The stopping protrusion  447  may be placed on the hook protrusion  417  of the body  410  to come into contact with the hook protrusion  417  of the body  410 . Since the stopping protrusion  447  is hooked with the hook protrusion  417  of the body  410 , an inserted depth of the reflective frame  440  or a distance between the reflective frame  440  and each of the first and second lead frames  421  and  431  may be adjusted. 
     The light-emitting chip  450  may be disposed on at least one of the first lead frame  421  and the second lead frame  431  and electrically connected to the first and second lead frames  421  and  431 . The light-emitting chip  450  may be connected to at least one of the first and second lead frames  421  and  431  through a conductive adhesive or conductive bump. The light-emitting chip  450  may be connected in a flip chip manner or connected by using at least one wire or a plurality of wires. The light-emitting chip  450  may have a horizontal chip or vertical chip structure, but is not limited thereto. 
     The light-emitting chip  450  may selectively emit light in a range from a visible light band to an ultraviolet light band. For example, the light-emitting chip  450  may be one selected from a red LED chip, a blue LED chip, a green LED chip, a yellow green LED chip, and a white LED chip. The light-emitting chip  450  may include an LED chip including at least one of the group III-V and/or II-VI compound semiconductors. The light-emitting device may include the light-emitting chip  450  having a large areas, for example, 0.6 mm or more or 1 mm or less to improve intensities of light. 
     A protection chip (not shown) may be disposed on at least one of the first and second lead frames  421  and  431 . The protection chip may be connected to the light-emitting chip  450  in parallel to protect the light-emitting chip  450 . The protection chip may be implemented with at least one of a thyristor, a Zener diode, or a transient voltage suppression (TVS). 
     A phosphor film  445  may be disposed on the light-emitting chip  450 . The phosphor film  455  may include at least one phosphor of red, green, and blue phosphors. For example, the light-emitting chip  450  emits blue light, the phosphor film  455  may include a yellow phosphor or green and red phosphors. 
     For another example, the light-emitting chip  450  emits UV light, the phosphor film  455  may include at least one or all of blue, green, and red phosphors. 
     For another example, the phosphor film  455  may not be provided on the light-emitting chip  450  and thus may include a phosphor for converting a wavelength of light in a molding member (not shown). The phosphor may be selected from YAG, TAG, silicate, nitride, oxy-nitride-based materials. The phosphor may include at least one of a red phosphor, a yellow phosphor, a blue phosphor, and a green phosphor, but is not limited thereto. The phosphor may include phosphors emitting light having different colors on the light-emitting chip  450 , but is not limited thereto. 
     The molding member (not shown) may be disposed in the cavity  415  and the region of the opening portion  445 . The molding member (not shown) may be made of a light transmissive material such as silicon or epoxy and be provided as a single layer or multilayer. The molding member (not shown) may have a surface having at least one of a flat shape, a concave shape, and a convex shape, but is not limited thereto. 
     An optical lens may be coupled to the opening portion  445  of the reflective frame  440 . The optical lens may include a convex lens, a concave lens, or a convex lens having a total reflective surface at a central portion thereof with respect to the light-emitting chip  450 , but is not limited thereto. The optical lens may include a Fresnel lens. 
     Referring to  FIGS. 6 to 8 , a structure of the reflective frame  440  will be described in detail. When a vertical direction with respect to a center of the opening portion  445  of the reflective frame  440  or a center of the light-emitting chip  450  is defined as an optical axis (Z) direction, the optical axis (Z) direction may be defined in the first axis (X) direction perpendicular to the optical axis (Z) direction and the second axis (Y) direction perpendicular to the first axis (X) direction. 
     An axis direction having an isogonic angle (e.g., 45 degrees) with respect to the first and second axes (X and Y) between the first and second axes (X and Y) may be defined as a third axis (W) direction. The third axis (W) direction may be a direction passing through a diagonal direction from a center of the light-emitting chip  450 . The first to third axes X, Y, and W may be defined on the same plane and perpendicular to the optical axis Z. 
     Referring to  FIGS. 2 and 6 , a central portion of two side surfaces SI opposite to each other of the side surfaces of the light-emitting chip  450  from the optical axis Z may be disposed on a straight-line in the first axis (X) direction and pass through the first and second lead frames  421  and  431 . A central portion of two side surfaces S 2  opposite to each other of the side surfaces of the light-emitting chip  450  from the optical axis Z may be disposed on a straight-line in the second axis (Y) direction and pass through the first or second lead frame  421  to  431 . The straight-line in the third axis (W) direction may pass through a diagonal direction of the light-emitting chip  450  from the optical axis Z and also pass through the first and second lead frames  421  and  431 . 
     Referring to  FIG. 6 , a center P 1  of the bottom surface of the opening portion  445  and a center P 2  of a top surface of the opening portion  445  may be disposed on the optical axis Z and disposed at a center of the light-emitting chip  450 . A boundary of the bottom surface or lower end of the opening portion  445  may be defined as a first outline A 0 , and a boundary of the top surface or upper end of the opening portion  445  may be defined as a second outline B 0 . 
     The first outline A 0  includes a first point A 1  crossing a straight-line in the first axis (X) direction from the center P 1  of the bottom surface of the opening portion  445 , a second point (A 2 ) crossing a straight-line in the second axis (Y) direction, and a third point A 3  crossing a straight-line in the third axis (W) direction. The first point Al may be a region adjacent to the first side surface S 1  of the light-emitting chip  450 , and the second point A 2  may be a region adjacent to the second side surface S 2  of the light-emitting chip  450 , and the third point A 3  may be a region adjacent to a corner region S 3  between the first and second side surfaces S 1  and S 2  of the light-emitting chip  450 . 
     The second outline B 0  includes a fourth point B 1  crossing a straight-line in the first axis (X) direction from the center P 2  of the top surface of the opening portion  445 , a fifth point (B 2 ) crossing a straight-line in the second axis (Y) direction, and a sixth point B 3  crossing a straight-line in the third axis (W) direction. 
     A first distance D 1  from the center P 1  of the bottom surface of the opening portion  445  or the optical axis Z to the first point A 1  disposed on the first axis X of the first outline A 0  may be equal to or greater than a second distance D 2  up to the second point A 2  disposed on the second axis Y. A ratio of the first distance D 11  to second distance D 2  may be a ratio of lengths of the second side surface S 2  and the first side surface S 1  of the light-emitting chip, for example, a ratio of D 1 :D 2  may be a ratio of lengths of S 2 :S 1  or a ratio of 1:0.8 to 1:1. When the second distance D 2  is greater by the ratio or more than the first distance D 1 , illuminance distribution in the second axis (Y) direction may have distribution that is not uniform when compared to illuminance distribution in the first axis (X) direction. When the light-emitting chip  450  has a rectangular shape or square shape, the light-emitting chip  450  may be spaced the same distance from the first and second points A 1  and A 2 . 
     A third distance D 3  from the center P 1  of the bottom surface of the opening portion  445  or the optical axis Z to the third point A 3  disposed on the third axis W of the first outline A 0  may be greater than one or all of the first and second distances D 1  and D 2 . Thus, a distance between the corner region S 3  of the light-emitting chip  450  and the third point A 3  may be equal to or different from that between each of the side surfaces Si and S 2  of the light-emitting chip  450  and each of the first and second points A 1  and A 2 . For example, when the distance between the corner region S 3  of the light-emitting chip  450  and the third point A 3  may be equal to that between each of the side surfaces S 1  and S 2  of the light-emitting chip  450  and each of the first and second points A 1  and A 2 , each of the points A 1 , A 2 , and A 3  of the inner surface  442  of the opening portion  445  may be equal to the distance between each of the side surfaces S 1  and S 2  of the light-emitting chip  450  and the corner region S 3 . Each of a line connecting the first point A 1  to the third point A 3  and a line connecting the third point A 3  to the second point A 2  may have a curved line. 
     A fourth distance D 4  from the center P 2  of the top surface of the opening portion  445  or the optical axis Z to the fourth point B 1  disposed on the first axis X of the second outline B 0  may be equal to or greater than a fifth distance D 5  up to the fifth point B 2 . A ratio of the fourth distance D 4  to the fifth distance D 5  may be equal to that of the first and second distances D 1  and D 2 , and illuminance distribution in the first axis (X) direction and the second axis (Y) direction may vary to the ratio. 
     A sixth distance D 6  from the center P 2  of the top surface of the opening portion  445  to the sixth point B 3  disposed on the third axis W may be less than one or all of the fourth and fifth distances D 4  and D 5 . Thus, an amount of light reflected from a region corresponding to each of the corner regions S 3  of the light-emitting chip  450  to an opposite region in the region of the inner surface  442  of the opening portion  445  may increase. 
     A first segment R 1  connecting the first point A 1  of the first outline A 0  to the fourth point B 1  of the second outline B 0  of the opening portion  445  may be tilted at a first angle θ1 with respect to the optical axis Z, a second segment R 2  connecting the second point A 2  to the fifth point B 2  may be tilted at a second angle θ2 with respect to the optical axis Z, and a third segment R 3  connecting the third point A 3  to the sixth point B 3  may be tilted at a third angle θ3 with respect to the optical axis Z. The third angle θ3 may be less than one or all of the first and second angles θ1 and θ2. 
     An inclination of the third segment R 3  may be greater than that of each of the first and second segments R 1  and R 2 . The inclination of the third segment R 3  may be an exterior angle between the third segment R 3  and the third axis W, the inclination of the first segment R 1  may be an exterior angle between the first segment R 1  and the first axis X, and the inclination of the second segment R 2  may be an exterior angle between the second segment R 2  and the second axis Y. 
     An inclination of each of regions S 11 , S 12 , and S 13  that is tilted to the inner surface  442  of the opening portion  445  may be an exterior angle between the inner surface  442  of the opening portion  445  and the regions S 11 , S 12 , and S 13  disposed on the first, second, and third axes Z, Y, and Z. The inclination of each of the regions S 11 , S 12 , and S 13  that is tilted to the inner surface  442  of the opening portion  445  may be obtained by a difference in slop of the first to third segments R 1 , R 2 , and R 3 . The side surface  442  adjacent to the first to third segments R 1 , R 2 , and R 3  may be a flat or curved surface, but is not limited thereto. 
     The regions S 11 , S 12 , and S 13  of the inner surface  442  include the first axis X and a first reflective region S 11  adjacent to the first axis X, the second axis Y and a second reflective region S 12  adjacent to the second axis Y, and the third axis W and a third reflective region S 13  adjacent to the third axis W. 
     The first reflective region S 11  disposed on the first axis X and the second reflective area S 12  disposed on the second axis Y may gradually increases in inclination as being adjacent to the third reflective region S 13  disposed on the third axis W or the third segment R 3 . The inner surface  442  of the opening portion  445  may gradually increase in inclination as being adjacent to the third axis W. On the other hand, the inner surface  442  of the opening portion  445  may gradually decrease in inclination as being away from the third axis W. 
     The side surface  442  of the opening portion  445  includes the first reflective region S 11  adjacent to the first side surface S 1  of the light-emitting chip  450  or disposed in the first axis (X) direction, the second reflective region S 12  adjacent to the second side surface S 2  of the light-emitting chip  450  or disposed in the second axis (Y) direction, and the third reflective region S 13  adjacent to the corner region S 3  of the light-emitting chip  450  or disposed in the third axis (W) direction. An inclination of the third reflective region S 13  may be greater than that of each of the first and second reflective regions S 11  and S 12 . Each of the first and second reflective regions S 11  and S 12  may gradually increase in inclination as being close to the third reflective region S 13 . 
     The third reflective region S 13  having the third segment R 3  may be a region adjacent to the corner region S 3  of the light-emitting chip  450  and be disposed between the first reflective region S 11  having the first segment R 1  and the second reflective region S 12  having the second segment R 2 . The third reflective region S 13  may reflect light incident from the light-emitting chip  450  to an opposite side by the inclination or the third angle  03  to improve the illuminance distribution in the diagonal direction in the camera module and reduce a deviation in illuminance distribution in the diagonal direction and illuminance distribution in the central portion. 
     The opening portion  445  may have a height H 1  greater 1.8 times to 2.2 times than the fourth distance D 4 , e.g., ranging from 2 mm to 3 mm. When the height H 1  of the opening portion  445  is less than the above-described range, it may be difficult to couple the constituents such as the optical lens and collect light. When the height H 1  of the opening portion  445  is greater than the above-described range, the camera module may increase in thickness. 
     Referring to  FIGS. 6 and 8 , in the width of the top surface of the opening portion  445 , a width K 1  of the top surface in the first axis (X) direction and a width K 2  of the top surface in the second axis (Y) direction may be greater than that K 3  of the top surface in the third axis (W) direction, and a length E 3  of the third segment R 3  may be less than that E 1  or E 2  of each of the first and second segments R 1  and R 2 . Since the inclination of the third segment R 3  is greater than that of each of the first and second segments R 1  and R 2 , the difference in width and length may be provided as described above. In addition, an amount of light reflected between the regions having the third segments R 3 , which face each other, may be increase. Each of the distances E 1 , E 2 , and E 3  between the first outline A 0  of the lower end and the second outline B 0  of the upper end of the side surface  442  may gradually decrease as being adjacent to the third axis W. 
     Referring to  FIGS. 7 and 8 , in the width of the bottom surface of the opening portion  445 , a width K 4  of the bottom surface in the first axis (X) direction and a width K 5  of the bottom surface in the second axis (Y) direction may be equal to or greater than that K 5  of the bottom surface in the second axis (Y) direction. The width K 6  of the bottom surface in the third axis (W) direction may be greater than that K 4  or K 5  of each of the bottom surfaces in the first and second axes X and Y. 
     In an embodiment, a width K 6  of the bottom surface in the third axis (W) direction of the widths of the bottom surface of the opening portion  445  of the reflective frame  440  may be greater than that K 4  or K 5  of each of the bottom surfaces in the first and second axes (X, Y) directions, and the width K 1  or K 2  of the top surface in the first or second axis (X or Y) direction of the widths of the top surface of the opening portion  445  may be greater than that K 3  of the top surface in the third axis (W) direction. 
     Also, the first to third segments R 1 , R 2 , and R 3  of the opening portion  445  may gradually decrease in length and increase in inclination as being close to the third segment R 3  adjacent to the corner region S 3  of the light-emitting chip  450 . Thus, an illuminance surface of light emitted from the light-emitting device may have a rectangular shape to improve the illuminance distribution in the diagonal direction. 
       FIG. 9  is a view for explaining a method for comparing light uniformity in the camera module. 
     Referring to  FIG. 9 , if an output screen of the camera module has a ratio (x:y) of 4:4, when a diagonal length of a rectangular shape corresponding to the ratio is 1 field, i.e., when a diagonal length of the rectangular shape is 100%, a diameter of a circle passing through the rectangular shape may be 0.7 fields or 70%. When  1  field is measured at a predetermined distance (for example, 1 m) from a center Pc of the circle, it is called a field of view (FOV). Here, when 0.7 fields are measured, it may be defined as 0.7 FOV. Here, the predetermined distance may be a distance up to a surface (to be irradiated) on which the camera module is evaluated. The light-emitting device may be defined as a flash device. 
     A light receiving sensor is disposed in a circle having a diagonal length of the 0.7 field square as a diameter and in an edge area C 1 , C 2 , C 3 , and C 4  of a 0.7 field square, thereby measuring the light uniformity of the camera module. 
     Referring to  FIGS. 2 and 9 , the light-emitting device  400  according to an embodiment may lower central illuminance of light emitted from the light-emitting chip  450  by the opening portion  445  of the reflective frame  440  and increase the illumination intensity of the 1.0 field. Thus, a difference in illuminance between the central illuminance and the 1.0 filed may be improved. The light-emitting device  400  according to an embodiment may compensate the illuminance in the diagonal direction or the corner region C 1 , C 2 , C 3 , and C 4  to reduce a deviation in the illuminance distribution over the entire area of the screen. 
     Table 1 shows results obtained by comparing samples #0 to #6 to each other according to an embodiment. The samples #0 to #6 represent distances D2, D3, D4, D5, and D6 with respect to the first distance D1 of the opening portion  445 , D6, and a height H1, respectively. Here, a unit of numerical values in Table 1 may be a ratio therebetween. 
     Table 2 shows an inclination of the side  442  of the opening portion  445  in the first axis (X) direction, an inclination in the second axis (Y) direction, and an inclination of the second axis (Y) direction in the samples #0 to #6 of Table 1 and also shows ratios of illuminance distribution in the camera module. 
     
       
         
           
               
               
               
               
               
               
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                 Classification 
                 H1 
                 D5 
                 D2 
                 D6 
                 D3 
                 D4 
                 D1 
               
               
                   
               
             
            
               
                 Sample#0 
                 2.380 
                 1.728 
                 0.940 
                 1.546 
                 1.118 
                 1.687 
                 1 
               
               
                 Sample#1 
                 2.380 
                 1.728 
                 0.940 
                 1.617 
                 1.118 
                 1.687 
                 1 
               
               
                 Sample#2 
                 2.380 
                 1.728 
                 0.940 
                 1.898 
                 1.118 
                 1.687 
                 1 
               
               
                 Sample#3 
                 2.380 
                 1.728 
                 0.940 
                 1.997 
                 1.118 
                 1.687 
                 1 
               
               
                 Sample#4 
                 2.380 
                 1.728 
                 0.940 
                 1.617 
                 1.005 
                 1.687 
                 1 
               
               
                 Sample#5 
                 2.380 
                 1.728 
                 0.940 
                 1.748 
                 1.005 
                 1.687 
                 1 
               
               
                 Sample#6 
                 2.380 
                 1.728 
                 0.940 
                 1.798 
                 1.005 
                 1.687 
                 1 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 2 
               
               
                   
               
               
                   
                 X- 
                 W- 
                 Y- 
                 1.0F 
                   
                   
               
               
                 Classification 
                 inclination 
                 inclination 
                 inclination 
                 (FOV72) 
                 1.0F/X 
                 1.0F/Y 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 Sample#0 
                 3.020305 
                 5.560748 
                 3.464338 
                 30.0% 
                 44.8% 
                 55.0% 
               
               
                 Sample#1 
                 3.020305 
                 4.769539 
                 3.464338 
                 24.2% 
                 37.0% 
                 48.5% 
               
               
                 Sample#2 
                 3.020305 
                 3.051282 
                 3.464338 
                 18.6% 
                 25.2% 
                 47.7% 
               
               
                 Sample#3 
                 3.020305 
                 2.707622 
                 3.464338 
                 18.6% 
                 24.8% 
                 53.4% 
               
               
                 Sample#4 
                 3.020305 
                 3.888889 
                 3.464338 
                 20.5% 
                 37.7% 
                 45.9% 
               
               
                 Sample#5 
                 3.020305 
                 3.20323 
                 3.464338 
                 15.2% 
                 28.1% 
                 39.9% 
               
               
                 Sample#6 
                 3.020305 
                 3.001261 
                 3.464338 
                 14.4% 
                 26.4% 
                 40.7% 
               
               
                   
               
            
           
         
       
     
     Referring to  FIG. 6 , In Table 2, the X-inclination is an inclination of the first segment R 1  in the first axis direction, the Y-inclination is an inclination of the second segment R 2  in the second axis (Y 2 ) direction, and the W-inclination is an inclination of the third segment R 3  in the direction of the third axis (W) direction which is a 45 degree direction of the X axis and the Y axis, 1.0 F is a brightness ratio of the edge portion to the central illuminance, and 1.0 F/X is a brightness ratio in the corner region in the first axis (X) direction to the central illuminance, and 1.0 F/Y is a brightness ratio in the edge area in the second axis (Y) direction to the central illuminance. 
     The X-inclination is obtained by H1/(D4−D1), the Y-inclination is obtained by H1/(D5−D2), and the W-inclination is obtained by H1/(D6−D3). The value of the Y-inclination may be greater than either or both of the X-inclination value and the Y-inclination value. 
     Referring to Table 2, when the W-inclination is greater than the inclination in the X or Y axis direction as shown by the samples #0, #1, and #4, it is seen that the illuminance distribution at 1.0 F is 20% or more. Accordingly, since the inclination of the side surface of the opening portion according to an embodiment is adjusted to correspond to the position of the light-emitting chip, the illuminance distribution of the camera module, particularly, the illuminance distribution in the diagonal region may further increase. 
       FIGS. 16A to 22A and 16B to 22B  show the illuminance distributions and the center brightness of the samples #0 to #6, respectively.  FIG. 16  shows the illuminance distributions and the center brightness of the sample #0 Tables 1 and 2,  FIG. 17  shows the illuminance distributions and the center brightness of the sample #1 in Tables 1 and 2,  FIG. 18  shows the illuminance distributions and the center brightness of the sample #2 in Tables 1 and 2,  FIG. 19  shows the illuminance distributions and the center brightness of the sample #3 in Tables 1 and 2,  FIG. 20  shows the illuminance distributions and the center brightness of the sample #4 in Tables 1 and 2,  FIG. 21  shows the illuminance distributions and the center brightness of the sample #5 in Tables 1 and 2, and  FIG. 22  shows the illuminance distributions and the center brightness of the sample #6 in Tables 1 and 2. Here, in the sample #0 shown in  FIG. 16 , the illuminance of the edge area has an illuminance deviation of less than 15% as compared with the outer region in the X-axis direction and the Y-axis direction. 
       FIG. 10  is a view illustrating another example of the light-emitting device of  FIG. 2 . 
     Referring to  FIG. 10 , a light-emitting device includes a plurality of light-emitting chips  451  and  452  disposed under an opening portion  445  of a reflective frame  440 . Two light-emitting chips  451  and  452  may be disposed in a first axis (X) direction or in a second axis (Y) direction. For another example, three light-emitting chips (not shown) may be disposed in a region within an angle of 120 degrees with respect to a center. For another example, four light-emitting chip may be arranged in the form of a matrix around the center. 
     The reflective frame  440  of the light-emitting device is coupled to a body  410 , and the opening portion  445  of the reflective frame  440  has an opened structure on the plurality of light-emitting chips  451  and  452 . This will be described with reference to the foregoing embodiments. A rectangular shape connecting the outermost edge points of the plurality of light-emitting chips may correspond to a rectangular shape of the light-emitting chip of  FIG. 1  to provide the inclination of the opening portion  445 . 
       FIGS. 11 and 12  are views illustrating another example of the light-emitting device of  FIG. 2 . 
     Referring to  FIGS. 11 and 12 , a light-emitting device includes a body  410 , a plurality of lead frames  421 A,  421 B, and  431 A coupled to the body  410 , a reflective frame  440 B having a plurality of opening portions  445 A and  445 B, light-emitting chips  453  and  454  disposed under the opening portions  445 A and  445 B. 
     The plurality of lead frames  421 A,  421 B, and  431 A may be coupled to the inside of the body  410 . The plurality of lead frames  421 A,  421 B, and  431 A may include two or more lead frames, for example, three or more lead frames. A first part of each of the first and second lead frames  421 A and  421 B may be disposed under the first opening portion  445 A of the reflective frame  440 B, and a second part of the second lead frame  421 B and the third lead frame  431 A may be disposed under the second opening portion  445 B. Each of the first opening portion  445 A and the second opening portion  445 B of the reflective frame  440 B are the same as the opening portion  445  of  FIGS. 6 to 8 , the first opening portion  445 A and the second opening portion  445 B will be described with reference to the above-described descriptions. For example, a side surface  443  of the first opening portion  445 A and a side surface  444  of the second opening portion  445 B will be described with reference to the descriptions of  FIGS. 6 to 8  according to the foregoing embodiments. 
     The second light-emitting chip  453  disposed under the first opening portion  445 A may emit the same light as the second light-emitting chip  454  disposed under the second opening portion  445 B or light having a different color. The first-light-emitting chip  453  may be disposed at least one of the first parts of the first and second lead frames  421 A and  421 B, and the second light-emitting chip  454  may be disposed on at least one of the second part of the second lead frame  421 B disposed under the second opening portion  445  and the third lead frame  431 A. 
     As illustrated in  FIG. 12 , a hole  429  may be defined in the second lead frame  421 B, and a portion  410 A of the body  410  may be coupled to the hole  429 . An adhesion member  460  may be disposed on a region between the body  410  and the reflective frame  440 B. 
     The body  410  may have a first cavity  415 A under the first opening portion  445 A and a second cavity  415 B under the second opening portion  445 B, and the first and second cavities  415 A and  415 B may be spaced apart from each other. 
     A first phosphor film  456  may be disposed on the first light-emitting chip  453 , and a second phosphor film  457  may be disposed on the second light-emitting chip  454 . The first phosphor film  456  and the second phosphor film  457  may be the same or different from each other. For example, when each of the first and second light-emitting chips  453  and  454  emits blue light, the first phosphor film  456  may have a yellow phosphor, and the second phosphor film  457  may have a red phosphor. 
     For another example, when each of the first and second light-emitting chips  453  and  454  emits blue light, the first phosphor film  456  may have a green phosphor, and the second phosphor film  457  may have a red phosphor. 
     For another example, when each of the first and second light-emitting chips  453  and  454  emits blue light, the first phosphor film  456  may have yellow and green phosphors, and the second phosphor film  457  may have red and green phosphors. 
     For another example, when each of the first and second light-emitting chips  453  and  454  emits UV light, the first phosphor film  456  may have blue and red phosphors, and the second phosphor film  457  may have a green phosphor. A kind of phosphors within the phosphor films  456  and  457  may vary according to a kind of light-emitting chips  453  and  454 , but is not limited thereto. 
       FIG. 13  is a view illustrating an example of the light-emitting chip according to an embodiment. 
     Referring to  FIG. 13 , the light-emitting chip may include a substrate  111 , a first semiconductor layer  113 , a light-emitting structure  120 , an electrode layer  131 , an insulation layer  133 , a first electrode  135 , a second electrode  137 , a first connection electrode  141 , a second connection electrode  143 , and a support layer  140 . 
     The substrate  111  may include a transmissive, insulating, or conductive substrate. For example, the substrate  111  may be made of at least one of sapphire (Al 2 O 3 ), SiC, Si, GaAs, GaN, ZnO, Si, GaP, InP, Ge, and Ga 2 O 3 . A plurality of convex portions (not shown) may be disposed on at least one or all of top and bottom surfaces of the substrate  111  to improve light extraction efficiency. Each of the convex portions may include a hemispheric shape, a semi-elliptical surface, or a polygonal shape in a lateral cross-section. Here, the substrate  111  may be removed from the inside of the light-emitting chip. In this case, the first semiconductor layer  113  or a first conductive type semiconductor layer  115  may be disposed on the top surface of the light-emitting chip. 
     The first semiconductor layer  113  may be disposed under the substrate  111 . The first semiconductor layer  113  may be made of the group II-V compound semiconductors. The first semiconductor layer  113  may be provided as at least one layer or plurality of layers by using the group II-V compound semiconductors. The first semiconductor layer  113  may include at least one of semiconductor layers using the group III-V compound semiconductors, e.g., GaN, InN, AlN, InGaN, AlGaN, InAlGaN, AlInN, AlGaAs, GaP, GaAs, GaAsP, AlGaInP, and GaP. The first semiconductor layer  113  may have a compositional formula of InxAlyGal-x-yN (0≦x≦1, 0≦y≦1, 0≦x+y≦1) and include at least one of a buffer layer and an undoped semiconductor layer. The buffer layer may reduce a difference in lattice constant between the substrate and the nitride semiconductor layer, and the undoped semiconductor layer may improve crystalline quality of the semiconductor. Here, the first semiconductor layer  113  may be omitted. 
     The light-emitting structure  120  may be disposed under the first semiconductor layer  113 . The light-emitting structure  120  may be made of a material selected from the group II-V and group III-V compound semiconductors to emit light having a predetermined peak wavelength in a wavelength range of an ultraviolet light band to a visible light band. 
     The light-emitting structure  120  includes a first conductive type semiconductor layer  115 , a second conductive type semiconductor layer  119 , and an active layer  117  disposed between the first conductive type semiconductor layer  115  and the second conductive type semiconductor layer  119 . The other semiconductor layer may be further disposed on at least one of top and bottom surfaces of each of the layers  115 ,  117 , and  119 , but is not limited thereto. 
     The first conductive type semiconductor layer  115  may be disposed under the first semiconductor layer  113  and realized as a semiconductor into which a first conductive type dopant is doped, e.g., an n-type semiconductor layer. The first conductive type semiconductor layer  115  may include a semiconductor material having a compositional formula of In x Al y Ga 1-x-y N (0≦x≦1, 0≦y≦1, 0≦x+y≦1). The first conductive type semiconductor layer  115  may be made of a material selected from the group III-V compound semiconductors, e.g., GaN, MN, AlGaN, InGaN, InN, InAlGaN, AlInN, AlGaAs, GaP, GaAs, GaAsP, and AlGaInP. The first conductive type dopant may be an n-type dopant and include a dopant such as Si, Ge, Sn, Se, and Te. 
     The active layer  117  may be disposed under the first conductive type semiconductor layer  115  and have one of a single quantum well structure, a multi quantum well (MQW) structure, a quantum wire structure, and a quantum dot structure and also have a cycle of a wall layer and a barrier layer. The cycle of the wall layer/barrier layer includes, for example, at least one of pairs of InGaN/GaN, GaN/AlGaN, AlGaN/AlGaN, InGaN/AlGaN, InGaN/InGaN, AlGaAs/GaA, InGaAs/GaAs, InGaP/GaP, AlInGaP/InGaP, and InP/GaAs. 
     The second conductive type semiconductor layer is disposed under the active layer  117 . The first conductive type semiconductor layer  119  may include a semiconductor, into which a second conductive type dopant is doped, having a compositional formula of In x Al y Ga 1-x-yl N ( 0≦x≦2, 0≦y&lt;1, 0≦x+y≦1). For example, the second conductive type semiconductor layer  119  may be made of at least one of compound semiconductors such as GaN, InN, A 1 N, InGaN, AlGaN, InAlGaN, AIInN, AlGaAs, GaP, GaAs, GaAsP, and AlGaInP. The second conductive type semiconductor layer  119  may be a p-type semiconductor layer, and the first conductive type dopant may include Mg, Zn, Ca, Sr, or Ba as a p-type dopant. 
     For another example of the light-emitting structure  120 , the first conductive type semiconductor layer  115  may be realized as a p-type semiconductor layer, and the second conductive type semiconductor layer  119  may be realized as an n-type semiconductor layer. Also, a third conductive type semiconductor layer having a polarity opposite to that of the second conductive type semiconductor layer may be disposed on the second conductive type semiconductor layer  119 . Also, the light-emitting structure  120  may have one structure of an n-p junction structure, a p-n junction structure, an n-p-n junction structure and a p-n-p junction structure. 
     The electrode layer  131  may be disposed under the second conductive type semiconductor layer  119 . The electrode layer  131  may include a reflective layer. The electrode layer  131  may include a contact layer that comes into contact with the second conductive type semiconductor layer  119  of the light-emitting structure  120 . The reflective layer may be made of a material having reflectivity of 70% or more, e.g., one of metals such as Al, Ag, Ru, Pd, Rh, Pt, and Ir and an alloy of two or more metals of the metals. The metal of the reflective layer may come into contact with a bottom surface of the second conductive type semiconductor layer  119 . The contact layer may be an ohmic contact layer and be made of a material selected from a light transmission material, a metal material, and a non-metal material. 
     The electrode layer  131  may have a laminated structure of the light transmission electrode layer/the reflective layer. For example, the light transmission electrode layer may be made of a material selected from indium tin oxide (ITO), indium zinc oxide (IZO), indium zinc tin oxide (IZTO), indium aluminum zinc oxide (IAZO), indium gallium zinc oxide (IGZO), indium gallium tin oxide (IGTO), aluminum zinc oxide (AZO), antimony tin oxide (ATO), gallium zinc oxide (GZO), Ag, Ni, Al, Rh, Pd, Ir, Ru, Mg, Zn, Pt, Au, Hf, and combinations thereof. The reflective layer made of a metal material may be disposed under the light transmissive electrode layer. For example, the reflective layer may be made of a material selected from Ag, Ni, Al, Rh, Pd, Ir, Ru, Mg, Zn, Pt, Au, Hf, and combinations thereof. For another example, the reflective layer may have a distributed bragg reflection structure in which two layers having different refractive indexes are alternately disposed. 
     A light extraction structure such as roughness may be formed on a surface of at least one layer of the second conductive type semiconductor layer  119  and the electrode layer  131 . The light extraction structure may change a critical angle of incident light to improve light extraction efficiency. 
     The insulation layer  133  may be disposed under the electrode layer  131 , e.g., disposed on a bottom surface of the second conductive type semiconductor layer  119 , side surfaces of the second conductive type semiconductor layer  119  and the active layer  117 , and a portion of an area of the first conductive type semiconductor layer  115 . The insulation layer  133  may be disposed in a region except for the electrode layer  131 , the first electrode  135 , and the second electrode  137  of a lower region of the light-emitting structure  120  to electrically protect the lower portion of the light-emitting structure  120 . 
     The insulation layer  133  may be made of an insulation material or an insulation resin formed of at least one of oxide, nitride, fluoride, and sulfide, which include at least one of Si, Al, Cr, Si, Ti, Zn, and Zr. The insulation layer  133  may be made of a material selected from, for example, SiO 2 , Si 3 N 4 , A 1   2 O 3 , and TiO 2 . The insulation layer  133  may have a single or multi layered structure, but is not limited thereto. When a metal structure for flip bonding is formed under the light-emitting structure  120 , the insulation layer  133  may prevent interlayer short-circuit of the light-emitting structure  120  from occurring. 
     The insulation layer  133  may have a distributed bragg reflector (DBR) structure in which first and second layers having different refractive indexes are alternately disposed. Here, the first layer may be made of one of SiO 2 , Si 3 N 4 , Al 2 O 3 , and TiO 2 , and the second layer may be made of a material except for the material of the first layer, but is not limited thereto. Alternatively, the first and second layers may be made of the same material or provided as a pair having three or more layers. In this case, the electrode layer may be omitted. 
     The first electrode  135  may be disposed under a portion of a region of the first conductive type semiconductor layer  115 , and the second electrode  137  may be disposed under a portion of the electrode layer  131 . The first connection electrode  141  may be disposed under the first electrode  135 , and the second connection electrode  143  may be disposed under the second electrode  137 . 
     The first electrode  135  may be electrically connected to the first conductive type semiconductor layer  115  and the first connection electrode  141 , and the second electrode may be electrically connected to the second conductive type semiconductor layer  119  and the second connection electrode  143  through the electrode layer  131 . 
     The first electrode  135  and the second electrode  137  may be made of at least one of Cr, Ti, Co, Ni, V, Hf, Ag, Al, Ru, Rh, Pt, Pd, Ta, Mo, and W or an allow thereof and have a single or multilayered structure. The first electrode  135  and the second electrode  137  may have the same laminated structure or different laminated structures. At least one of the first electrode  135  and the second electrode  137  may further include a current spreading pattern having an arm or finger structure. Also, each of the first electrode  135  and the second electrode  137  may be provided in one or plurality, but is not limited thereto. At least one of the first and second connection electrodes  141  and  143  may be provided in plurality, but is not limited thereto. 
     Each of the first connection electrode and the second connection electrode  143  may function as a lead for supplying power and provide a heat releasing path. Each of the first connection electrode  141  and the second connection electrode  143  may have at least one of a circular shape, a polygonal shape, a cylindrical shape, or a polyprism shape. Each of the first connection electrode  141  and the second connection electrode  143  may be made of a metal powder material, e.g., Ag, Al, Au, Cr, Co, Cu, Fe, Hf, In, Mo, Ni, Si, Sn, Ta, Ti, W, and an alloy selected from the metals. Each of the first connection electrode  141  and the second connection electrode  143  may be formed by plating one metal of In, Sn, Ni, Cu, and an alloy selected from the metals to improve adhesion with the first electrode  135  and the second electrode  137 . 
     The support layer  140  may be made of a hest conductive material and disposed around the first electrode  135 , the second electrode  137 , the first connection electrode  141 , and the second connection electrode  143 . Bottom surfaces of the first and second connection electrodes  141  and  143  may be exposed through a bottom surface of the support layer  140 . 
     The support layer  140  may be used as a layer supporting the light-emitting device  100 . The support layer  140  may be made of an insulation material. The insulation material may include a resin material such as silicon or epoxy. For another example, the insulation material may include paste or insulation ink. A kind of insulation material may include alone or combinations of a polyacrylate resin, an epoxy resin, a phenolic resin, a polyamides resin, a polyimides resin, an unsaturated polyesters resin, a polyphenylene ether resin (PPE), a polyphenilene oxide resin (PPO), a polyphenylenesulfides resin, a cyanate ester resin, benzocyclobutene (BCB), polyamido-amine dendrimers (PAMAM), polypropylene-imine, Dendrimers (PPI), and PAMAM-OS(organosilicon) having a PAMAM internal structure and an organic-silicon outer surface. The support layer  140  may be made of a material different from that of the insulation layer  133 . 
     At least one of compounds such as oxide, nitride, fluoride, and sulfide, which include at least one of Al, Cr, Si, Ti, Zn, and Zr, may be added to the support layer  140 . Here, the compound added to the support layer  140  may serve as a heat dispersing agent. The heat dispersing agent may be used as a powder particle having a predetermined size, a grain, a filler, and an additive. The heat dispersing agent may include a ceramic material. The ceramic material may include at least one of low temperature co-fired ceramic (LTCC), high temperature co-fired ceramic (HTCC), alumina, quartz, calcium zirconate, forsterite, SiC, graphite, fusedsilica, mullite, cordierite, zirconia, beryllia, and aluminum nitride. The ceramic material may include metal nitride, which has heat conductivity greater than that of nitride or oxide, of the insulation material such as nitride or oxide, and the metal oxide may include, for example, a material having heat conductivity of 140 W/mK or more. The ceramic material may be a ceramic-based material, for example, such as SiO 2 , Si x O y , Si 3 N 4 , Si x N y , SiO x N y , Al 2 O 3 , BN, Si 3 N 4 , SiC(SiC—BeO), BeO, CeO, and AlN. The heat conductive material may include a component of C (diamond, CNT). 
     The first and second connection electrodes  141  and  143  of the light-emitting chip are electrically connected to the circuit board. 
       FIG. 14  is a view illustrating another example of a light-emitting chip according to an embodiment. 
     Referring to  FIG. 14 , the light-emitting chip includes a light-emitting structure  225  and a plurality of pads  245  and  247 . The light emitting structure  225  may be provided as the group II-VI compound semiconductor layer, the group III-V compound semiconductor layer, or the group II-VI compound semiconductor layer. The plurality of pads  245  and  247  may be selectively connected to the semiconductor layer of the light-emitting structure  225  to supply power. 
     The light-emitting structure  225  may include a first conductive type semiconductor layer  222 , an active layer  223 , and a second conductive type semiconductor layer  224 . The light-emitting chip may include a substrate  221 . The substrate  221  may be disposed on the light-emitting structure  225 . The substrate  221  may be, for example, a light transmissive or insulation substrate or a conductive substrate. The constituents will be described with reference to the descriptions of the light-emitting structure and the substrate. 
     Pads  245  and  247  may be disposed on a lower portion of the light-emitting chip, and the pads  245  and  247  may include first and second pads  245  and  247 . The first and second pads  245  and  247  are disposed spaced apart from each other under the light-emitting chip. The first pad  245  is electrically connected to the first conductive type semiconductor layer  222 , and the second pad  247  is electrically connected to the second conductive type semiconductor layer  224 . Each of the first and second pads  245  and  247  may have a bottom shape having a polygonal or circular shape. 
     The light-emitting chip may include at least one of a buffer layer (not shown) and an undoped semiconductor layer (not shown) between the substrate  221  and the light-emitting structure  225 . The buffer layer may be a layer for reducing a lattice constant different between the substrate  221  and the semiconductor layer and may be made of a material selected from the group II-VI compound semiconductors. An undoped group III-V compound semiconductor layer may be further disposed under the buffer layer  112 , but is not limited thereto. The substrate  221  may be removed. When the substrate is removed, the phosphor layer  250  may come into contact with a top surface of the first conductive type semiconductor layer  222  or a top surface of the other semiconductor layer. 
     The light-emitting chip includes first and second electrode layers  241  and  242 , a third electrode layer  243 , and insulation layers  231  and  233 . Each of the first and second electrode layers  241  and  242  may have a single or multilayered structure and function as a current spreading layer. The first and second electrode layers  241  and  242  may include a first electrode layer  241  disposed under the light emitting structure  225  and a second electrode layer  242  disposed under the first electrode layer  241 . The first electrode layer  241  may spread current, and the second electrode layer  241  may reflect incident light. 
     The first and second electrode layers  241  and  242  may be made of materials different from each other. The first electrode layer  241  may be made of a light transmissive material, for example, metal oxide or metal nitride. The first electrode layer may be made of a material selected from indium tin oxide (ITO), ITO nitride (ITON), indium zinc oxide (IZO), IZO nitride (IZON), indium zinc tin oxide (IZTO), indium aluminum zinc oxide (IAZO), indium gallium zinc oxide (IGZO), indium gallium tin oxide (IGTO), aluminum zinc oxide (AZO), antimony tin oxide (ATO), and gallium zinc oxide (GZO). The second electrode layer  242  may come into contact with a bottom surface of the first electrode layer  241  and function as a reflective electrode layer. The second electrode layer  242  may be made of a metal, for example, Ag, Au, or Al. When a portion of a region of the first electrode layer  241  is removed, the second electrode layer  242  may come into partial contact with the bottom surface of the light emitting structure  225 . 
     For another example, the first and second electrode layers  241  and  242  may be laminated with an omni directional reflector layer (ODR) structure. The ODR structure may be a structure in which the first electrode layer  241  having a low refractive index and the second electrode layer  242  coming into contact with the first electrode layer  241  and made of a metal material having high reflectivity are laminated. The electrode layers  241  and  242  may have, for example, a laminated structure of ITO/Ag. A total orientation reflection angle may be improved at an interface between the first electrode layer  241  and the second electrode layer  242 . 
     For another example, the second electrode layer  242  may be removed or provided as a reflective layer made of different material. The reflective layer may have a distributed bragg reflector (DBR) structure. The DBR structure may include a structure in which two dielectric layers having different refractive indexes are alternately disposed, for example, may include one of a SiO 2  layer, a Si 3 N 4  layer, a TiO 2  layer, an A 1   2 O 3  layer, and an MgO layer. 
     For another example, the electrode layers  241  and  242  may include all of the DBR structure and the ODR structure. In this case, the light-emitting chip having light reflectivity of 98% or more may be provided. Since the light-emitting chip mounted in the flip manner emits light reflected from the second electrode layer  242  through the substrate  221 , most of light may be released in a vertical upward direction. Also, light emitted from a side surface of the light-emitting chip may be reflected to an incident surface area of the optical lens by the opening portion of the reflective frame. 
     The third electrode layer  243  may be disposed under the second electrode layer  242  and electrically insulated from the first and second electrode layers  241  and  242 . The third electrode layer  243  may be made of a metal, for example, at least one of Ti, Cu, Ni, Au, Cr, Ta, Pt, Sn, Ag, and P. 
     The first pad  245  and the second pad  247  are disposed under the third electrode layer  243 . The insulation layers  231  and  233  may prevent unnecessary contact between the layers of the first and second electrode layers  241  and  242 , the third electrode layer  243 , the first and second pads  245  and  247 , and the light-emitting structure  225  from occurring. The insulation layers  231  and  233  include first and second insulation layers  231  and  233 . The first insulation layer  231  is disposed between the third electrode layer  243  and the second electrode layer  242 . The second insulation layer  233  is disposed between the third electrode layer  243  and the first/second pads  245  and  247 . 
     The third conductive layer  243  is connected to the first conductive type semiconductor layer  222 . The connection part  244  of the third electrode layer  243  protrudes from a via structure through the first and second electrode layers  241  and  242  and the light emitting structure  225  to come into contact with the first conductive type semiconductor layer  222 . The connection part  244  may be provided in plurality. A portion  232  of the first insulation layer  231  extends to the surrounding of the connection part  224  of the third electrode layer  243  to prevent the third insulation layer  243 , the first and second electrode layers  241  and  242 , the second conductive type semiconductor layer  224 , and the active layer  223  from being electrically connected to each other. An insulation layer may be disposed on a side surface of the light emitting structure  225  to protect the side surface, but is not limited thereto. 
     The second pad  247  is disposed under the second insulation layer  233  and comes into contact with or is connected to at least one of the first and second electrode layers  241  and  242  through an opened region of the second insulation layer  233 . The first pad  245  is disposed under the second insulation layer  233  and connected to the third electrode layer  243  through the opened region of the second insulation layer  233 . Thus, a protrusion  248  of the first pad  247  is electrically connected to the second conductive type semiconductor layer  224  through the first and second electrode layers  241  and  242 , and a protrusion  246  of the second pad  245  is electrically connected to the first conductive type semiconductor layer  222  through the third electrode layer  243 . 
     The first and second pads  245  and  247  may be spaced apart from a lower portion of the light-emitting chip and be electrically connected to the circuit board  10 . A bonding member may be disposed between the light-emitting chip and the circuit board. The bonding member may include a solder paste material, for example, at least one of gold (Au), tin (Sn), lead (Pb), copper (Cu), bismuth (Bi), indium (In), and silver (Ag). 
     For another example, the bonding members may include conductive films. Each of the conductive films includes one or more conductive particles in an insulation film. The conductive particles may be made of, for example, at least one of a metal, a metal alloy, and carbon. The conductive particles may be made of at least one of nickel, silver, gold, aluminum, chrome, copper, and carbon. The conductive film may include an anisotropic conductive film or an anisotropic conductive adhesive. 
     For another example, the bonding member may include a heat conductive film. The heat conductive film may include a polyester resin such as polyethylene terephthalate, polybutylene terephthalide, polyethylene naphthalate, and polybutylene naphthalate; a polyimide resin; an acrylic resin; a styrene-based resin such as polystyrene and acrylonitrile-styrene; a polycarbonate resin; a polylactic acid resin; and a polyurethane resin. Also, the heat conductive film may be made of a polyolefin resin such as polyethylene, polypropylene and ethylene-propylene copolymer; a vinyl resin such as polyvinyl chloride and polyvinylidene chloride; a polyamide resin; a sulfonic resin; a polyether-ether ketone resin; an allylate-based resin; or blends of the resins. 
       FIG. 15  is a view illustrating another example of a light-emitting chip according to an embodiment. 
     Referring to  FIG. 15 , the light-emitting chip may include a light-emitting structure  10  including a plurality of semiconductor layers  11 ,  12 ,  13 , a first electrode layer  20  under the light-emitting structure  10 , a second electrode layer  50  under the first electrode layer  20 , an insulation layer  41  between the first and second electrode layers  20  and  50 , and a pad  25 . 
     The light-emitting structure  10  may include a first semiconductor layer  11 , an active layer  12 , and a second semiconductor layer  13 . The active layer  12  may be disposed between the first semiconductor layer  11  and the second semiconductor layer  13 . The active layer  12  may be disposed under the first semiconductor layer  11 , and the second semiconductor layer  13  may be disposed under the active layer  12 . 
     For example, the first semiconductor layer  11  may include an n-type semiconductor layer to which a first conductive type dopant, e.g., an n-type dopant is added, and the second semiconductor layer  13  may include a p-type semiconductor layer to which a second conductive type dopant, e.g., a p-type dopant is added. On the other hand, the first semiconductor layer  11  may be provided as a p-type semiconductor layer, and the second semiconductor layer  13  may be provided as an n-type semiconductor layer. 
     A rough unevenness  11 A may be disposed on a top surface of the first semiconductor layer  11 , and the unevenness surface  11 A may improve light extraction efficiency. The unevenness surface  11 A may have a lateral cross-section with a polygonal shape or a hemispherical shape. 
     The first electrode layer  20  is disposed between the light-emitting structure and the second electrode layer  50  and electrically connected to the second semiconductor layer  13  of the light-emitting structure  10  and also electrically connected to the second electrode layer  50 . The first electrode layer  20  includes a first contact layer  15 , a reflective layer  17 , and a capping layer  19 . The first contact layer  15  is disposed between the reflective layer  17  and the second semiconductor layer  13 , and the reflective layer  17  is disposed between the first contact layer  15  and the capping layer  19 . The first contact layer  15 , the reflective layer  17 , and the capping layer  19  may be made of different conductive materials, but is not limited thereto. 
     The first contact layer  15  may come into contact with the second semiconductor layer, for example, come into ohmic-contact with the second semiconductor layer  13 . The first contact layer  15  may be made of, for example, a conductive oxide film, conductive nitride, or a metal. The first contact layer  15  may be made of at least one of indium tin oxide (ITO), ITO nitride (ITON), indium zinc oxide (IZO), IZO nitride (IZON), aluminum zinc oxide (AZO), aluminum gallium zinc oxide (AGZO), indium zinc tin oxide (IZTO), indium aluminum zinc oxide (IAZO), indium gallium zinc oxide (IGZO), indium gallium tin oxide (IGTO), antimony tin oxide (ATO), gallium zinc oxide (GZO), IZO nitride (IZON), ZnO, IrO x , RuO x , NiO, Pt, Ag, and Ti. 
     The reflective layer  17  may be electrically connected to the first contact layer  15  and the capping layer  19 . The reflective layer  17  may reflect light incident from the light-emitting structure  10  to perform a function for increasing an amount of light extracted to the outside. 
     The reflective layer  17  may be made of a metal having light reflectivity of 70% or more. For example, the reflective layer  17  may be made of a metal including at least one of Ag, Ni, Al, Rh, Pd, Ir, Ru, Mg, Zn, Pt, Au and Hf or an ally thereof. Also, the reflective layer  17  may be realized as a multi-layer using the above-described metal or an alloy and a light transmissive conductive material such as indium-tin-oxide (ITO), indium-zinc-oxide (IZO), indium-zinc-tin-oxide (IZTO), indium-aluminum-zinc-oxide (IAZO), indium-gallium-zinc-oxide (IGZO), indium-gallium-tin-oxide (IGTO), aluminum-zinc-oxide (AZO), or antimony-tin-oxide (ATO). 
     For example, the reflective layer  17  according to an embodiment may include at least one of Ag, Al, an Ag—Pd—Cu alloy, or an Ag—Cu alloy. For example, the reflective layer  17  may have a structure in which an Ag layer and an Ni layer are alternately disposed or may include an Ni/Ag/Ni or Ti layer and a Pt layer. For another example, the first contact layer  15  may be disposed under the reflective layer  17 , and at least a portion of the first contact layer  15  may pass through the reflective layer  17  to come into contact with the second semiconductor layer  13 . For another example, the reflective layer  17  may be disposed under the first contact layer  15 , and a portion of the reflective layer  17  may pass through the first contact layer  15  to come into contact with the second semiconductor layer  13 . 
     The light-emitting device according to an embodiment may include a capping layer  19  disposed under the reflective layer  17 . The capping layer  19  comes into contact with a bottom surface of the reflective layer  17 , and a contact part  34  is coupled to a pad  25  to function as a line layer for transmitting power supplied to the pad  25 . The capping layer may be made of a metal, for example, at least one of Au, Cu, Ni, Ti, Ti—W, Cr, W, Pt, V, Fe, and Mo. 
     The contact part  34  of the capping layer  19  is disposed in a region, which does not vertically overlap the light-emitting structure  10 , to vertically overlap the pad  25 . The contact part  34  of the capping layer  19  is disposed in a region which does not vertically overlap the first contact layer  15  and the reflective layer  17 . The contact part  34  of the capping layer  19  is disposed at a position lower than that of the light-emitting structure  10  to come into direct contact with the pad  25 . 
     The pad  25  may be provided as a single layer or multilayered structure. The single layer may be made of Au, and when the pad  25  is provided as the multilayered structure, the pad  25  may include at least two materials of Ti, Ag, Cu, and Au. Here, in case of the multilayered structure, a laminated structure of Ti/Ag/Cu/Au or a laminated structure of Ti/Cu/Au may be provided. At least one of the reflective layer  17  and the first contact layer  15  may come into direct contact with the pad  25 , but is not limited thereto. 
     The pad  25  may be disposed in a region Al between an outer wall of the first electrode layer  20  and the light-emitting structure  10 . The protection layer  30  and the light transmissive layer  45  may come into contact with a periphery of the pad  25 . 
     The protection layer  30  may be disposed on a bottom surface of the light-emitting structure  10  to come into contact with a bottom surface of the second semiconductor layer  13  and the first contact layer  15  and also come into contact with the reflective layer  17 . 
     An inner portion, which vertically overlaps the light-emitting structure  10 , of the protection layer  30  may be disposed to vertically overlap a region of the protrusion  16 . 
     An outer portion of the protection layer  30  may extend upward from the contact part  34  of the capping layer  19  and be disposed to vertically overlap the contact part  34 . The outer portion of the protection layer  30  may come into contact with the pad  25 , for example, be disposed on a circumferential surface of the pad  25 . 
     The inner portion of the protection layer  30  may be disposed between the light-emitting structure  10  and the first electrode layer  20 , and the outer portion may be disposed between the light transmissive layer  45  and the contact part  34  of the capping layer  45 . The outer portion of the protection layer  30  may extend from a side wall of the light-emitting structure  10  to an external region A 1  to prevent moisture from being permeated. 
     The protection layer  30  may be defined as a channel layer, a low refractive index material layer, or an isolation layer. The protection layer  30  may be made of an insulation material, e.g., oxide or nitride. For example, the protection layer  30  may be made of at least one material selected from the group consisting of SiO 2 , Si x O y , Si 3 N 4 , Si x N y , SiO x N y , Al 2 O 3 , TiO 2 , and AlN. The protection layer  30  may be made of a transparent material. 
     The light-emitting device according to an embodiment may include an insulation layer for electrically insulating the first electrode layer  20  from the second electrode layer  50 . The insulation layer  41  may be disposed between the first electrode layer  20  and the second electrode layer  50 . An upper portion of the insulation layer  41  may come into contact with the protection layer  30 . The insulation layer  41  may be made of, for example oxide or nitride. For example, the insulation layer  41  may be made of at least one material selected from the group consisting of SiO 2 , Si x O y , Si 3 N 4 , Si x N y , SiOxN y , Al 2 O 3 , TiO 2 , and AlN. 
     The insulation layer  41  may have, for example, a thickness of 100 nanometers to 2,000 nanometers. When the insulation layer  41  has a thickness of 100 nanometers or less, insulation characteristics may be deteriorated. When the insulation layer  41  has a thickness exceeding 2,000 nanometers, cracking may occur in the post-process. The insulation layer  41  may come into contact with a bottom surface of the first electrode layer  20  and a top surface of the second electrode layer  50  and thus have a thickness greater than that of each of the protection layer  30 , the capping layer  19 , the contact layer  15 , and the reflective layer  17 . 
     The second electrode layer  50  may include a diffusion barrier layer  52  disposed under the insulation layer  41 , a bonding layer  54  disposed under the diffusion barrier layer  52 , and a conductive support member  56  disposed under the bonding layer  54  and be electrically connected to the first semiconductor layer  11 . Also, the second electrode layer  50  may selectively include one or two of the diffusion barrier layer  52 , the bonding layer  54 , and the conductive support member  56 . At least one of the diffusion barrier layer  52  and the bonding layer  54  may be omitted. 
     The diffusion barrier layer  52  may be made of at least one of Au, Cu, Ni, Ti, Ti—W, Cr, W, Pt, V, Fe, and Mo. The diffusion barrier layer  52  may function as a diffusion barrier between the insulation layer  41  and the bonding layer  54 . The diffusion barrier layer  52  may be electrically connected to the bonding layer  54  and the conductive support member  56  and also electrically connected to the first semiconductor layer  11 . 
     The diffusion barrier layer  52  may perform a function for preventing a material contained in the bonding layer  54  from being diffused in a direction of the reflective layer  17  when the bonding layer  54  is manufactured. The diffusion barrier layer  52  may prevent a material such as tin (Sn) contained in the bonding layer  54  from having an influence on the reflective layer  17 . 
     The bonding layer  54  may be made of a barrier metal or bonding metal, for example, at least one of Ti, Au, Sn, Ni, Cr, Ga, In, Bi, Cu, Ag, Nb, Pd, or Ta. The conductive support member  56  may perform a heat dissipation function by supporting the light-emitting structure  10  according to an embodiment. The bonding layer  54  may include a seed layer. 
     The conductive support member  56  may be formed by using a metal or a carrier substrate, for example, a semiconductor substrate (e.g., Si, Ge, GaN, GaAs, ZnO, SiC, and SiGe) into which Ti, Cr, Ni, Al, Pt, Au, W, Cu, Mo, Cu—W or an impurity is injected. The conductive support member  56  may be a layer for supporting the light-emitting device  100  and have a thickness corresponding to 80% of a thickness of the second electrode layer  50 , i.e., a thickness of 30 μm or more. 
     The second contact layer  33  is disposed in the first semiconductor layer  11  to come into contact with the first semiconductor layer  11 . A top surface of the second contact layer may be disposed at a position higher than a bottom surface of the first semiconductor layer  11 , electrically connected to the first semiconductor layer  11 , and insulated from the active layer  12  and the second semiconductor layer  13 . 
     The second electrode  33  may be electrically connected to the second conductive layer  50 . The second contact layer  33  may be disposed to pass through the first electrode layer  20 , the active layer  12 , and the second semiconductor layer  15 . The second contact layer  33  may be disposed in a recess  2  defined in the light-emitting structure  10  and insulated from the active layer  12  and the second semiconductor layer  15  by the protection layer  30 . The second contact layer  33  may be provided in plurality, and the plurality of second contact layers  33  may be spaced apart from each other. 
     The second contact layer  33  may be connected to a protrusion  51  of the second electrode layer  50 , and the protrusion  51  may protrude from the diffusion barrier layer  52 . The protrusion  51  may pass through a hole  41 A defined in the insulation layer  41  and the protrusion layer  30  and be insulated from the first electrode layer  20 . 
     The second contact layer  33  may be made of at least one of Cr, V, W, Ti, Zn, Ni, Cu, Al, Au, and Mo. For another example, the protrusion  51  may include at least one of the materials forming the diffusion barrier layer  52  and the bonding layer  54 , but is not limited thereto. For example, the protrusion  51  may include at least one of Ti, Au, Sn, Ni, Cr, Ga, In, Bi, Cu, Ag, Nb, Pd or Ta. 
     The pad  25  is electrically connected to the first electrode layer  20  and exposed to the region Al outside the sidewall of the light-emitting structure  10 . The pad  25  may be provided in one or plurality. For example, the pad  25  may be made of at least one of Au, Cu, Ni, Ti, Ti—W, Cr, W, Pt, V, Fe, and Mo. 
     The light transmissive layer  45  may protect a surface of the light-emitting structure  10 , insulate the pad  25  from the light-emitting structure  10 , and come into contact with a peripheral portion of the protection layer  30 . The light transmissive layer  45  may have a refractive index less than that of the semiconductor layer constituting the light-emitting structure  10  to improve the light extraction efficiency. The light transmissive layer  45  may be made of, for example, oxide or nitride. For example, the light transmissive layer  45  may be made of at least one material selected from the group consisting of SiO 2 , Si x O y , Si 3 N 4 , Si x Ny, SiOxN y , Al 2 O 3 , TiO 2 , and AlN. The light transmissive layer  45  may be omitted according to a design. According to an embodiment, the light-emitting structure  10  may be driven by the first electrode layer  20  and the second electrode layer  50 . 
     In the light-emitting device according to an embodiment, the deterioration of the center-side illuminance distribution may be inhabited in the camera module to improve the illuminance distribution in the corner region, particularly, the corner region. Therefore, the entire light uniformity may be improved. 
     Features, structures, and effects described in the above embodiments are incorporated into at least one embodiment, but are not limited to only one embodiment. Moreover, features, structures, and effects exemplified in one embodiment can easily be combined and modified for another embodiment by those skilled in the art. Therefore, these combinations and modifications should be construed as falling within the scope of the present invention. 
     Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art. 
     INDUSTRIAL APPLICABILITY 
     In the embodiments, the light-emitting device may be improved in illuminance distribution. 
     In the embodiments, the camera module including the light-emitting device may be improved in light uniformity. 
     In the embodiments, the light-emitting device and the optical module having the same may be improved in optical reliability.