WO2003075367A1 - Dispositif electroluminescent comprenant une puce a del et procede de fabrication de celui-ci - Google Patents
Dispositif electroluminescent comprenant une puce a del et procede de fabrication de celui-ci Download PDFInfo
- Publication number
- WO2003075367A1 WO2003075367A1 PCT/JP2003/002448 JP0302448W WO03075367A1 WO 2003075367 A1 WO2003075367 A1 WO 2003075367A1 JP 0302448 W JP0302448 W JP 0302448W WO 03075367 A1 WO03075367 A1 WO 03075367A1
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- WIPO (PCT)
- Prior art keywords
- electrode pattern
- led chip
- electrode
- hole
- emitting device
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 238000000034 method Methods 0.000 title description 4
- 239000002184 metal Substances 0.000 claims abstract description 50
- 229910052751 metal Inorganic materials 0.000 claims abstract description 50
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 32
- 239000000057 synthetic resin Substances 0.000 claims abstract description 32
- 238000004806 packaging method and process Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 23
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 239000004020 conductor Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/483—Containers
- H01L33/486—Containers adapted for surface mounting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48225—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
- H01L2224/48227—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation connecting the wire to a bond pad of the item
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
- H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/12—Passive devices, e.g. 2 terminal devices
- H01L2924/1204—Optical Diode
- H01L2924/12041—LED
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/52—Encapsulations
Definitions
- the present invention relates to a light emitting device having a structure in which an LED chip mounted on a wiring board or the like is packaged with a transparent synthetic resin lens body, and a method for manufacturing the same.
- this type of light emitting device has a pair of a first electrode pattern and a second electrode pattern formed on an upper surface of a wiring board, and an LED chip mounted on an upper surface of the second electrode pattern.
- the LED chip and the first electrode pattern are electrically connected to each other by wire bonding with a thin metal wire, and the LED chip portion of the upper surface of the wiring board is made of a transparent synthetic resin.
- the lens body is formed so as to package the LED chip and the metal wire with the lens body.
- Japanese Patent Application Laid-Open No. Hei 4-282669 discloses, as shown in FIGS. 10 and 11, a second electrode pattern 2 formed on a top surface of a wiring board 1 by a metal film in plan view.
- the LED chip 3 is mounted in the center of the circle, and the cutout groove 4 extending inward from the outer periphery toward the LED chip 3 is formed in the circular second electrode pattern 2.
- a first electrode pattern 5 of a metal film is formed on a portion of the upper surface of the wiring substrate 1 in the cut groove 4 so as to extend radially outward.
- a transparent synthetic resin in a liquid state is formed on the upper surface of the circular second electrode pattern 2. Drop an appropriate amount and raise it into a substantially hemispherical shape and cure in this state To form lens body 7 by are doing.
- This prior art has a configuration in which the second electrode pattern 2 is formed in a circular shape with a metal film, and a lens body 7 is provided on the upper surface thereof. Since it becomes a reflective film for the light emitted from 3, there is an advantage that the luminance of the emitted light can be improved.
- the circular second electrode pattern 2 is provided with a cut groove 4 extending from the outer periphery toward the LED chip 3, and the first electrode pattern 5 made of a metal film is formed in the cut groove 4. Is formed so as to extend radially outward, there is a problem as described below.
- the liquid transparent synthetic resin for forming the lens body 7 when a transparent synthetic resin for forming the lens body 7 is dropped in a liquid state on the upper surface of the circular second electrode pattern 2, the liquid transparent synthetic resin becomes a circular second electrode pattern. After spreading radially outward along the upper surface of the second electrode pattern 2, it reaches the edge of the outer peripheral circle of the first electrode pattern 2, and the surface tension causes a substantially hemispherical bulge on the upper surface of the second electrode pattern 2. In this state, it hardens to form the lens body 7.
- the ⁇ of the outer circumferential circle of the second electrode pattern 2 is not only partially cut at the cut groove 4 forming the first electrode pattern 5, but also The first electrode pattern 5 is disposed so as to extend to the outside, and a part of the liquid transparent synthetic resin dropped on the second electrode pattern 2 is formed by the cut groove.
- the wire extends over the upper surface of the first electrode pattern 5 and further extends outside the edge of the outer circumferential circle of the second electrode pattern 1. .
- the lens body 7 after hardening does not become a perfect circle in the plan view as the shape of the second electrode pattern 2 but partially expands at the location of the first electrode pattern 5.
- the shape of the lens body 7 cannot be made substantially the same for a large number of lenses, and the lens shape largely varies.
- a circular ring is formed on the upper surface of the circular second electrode pattern 2 so as to surround the LED chip 3 and the metal wire 6 as shown in FIG.
- a dam ring 8 By dropping a liquid transparent synthetic resin, the lens body 7 is formed in a predetermined shape, and variation in the lens shape is reduced.
- dam ring 8 on the upper surface of the circular second electrode pattern 2 not only increases the manufacturing cost and raises the price, but also causes the emission of light from the LED chip 3 to cause the dam ring 8 to emit light. There is a problem that the light amount is reduced by being blocked at 8.
- An object of the present invention is to provide a structure of a light emitting device that solves these problems and a method of manufacturing the same. Disclosure of the invention
- a first aspect of the present invention relates to a structure of a light emitting device, comprising: a first electrode pattern and a second electrode pattern formed of a metal film on a surface of a wiring board; and an LED chip mounted on the second electrode pattern.
- a light emitting device comprising: a metal wire for electrically connecting the LED chip and the first electrode pattern to each other; and a lens rest made of a transparent synthetic resin for packaging the LED chip and the metal wire on the surface of the wiring board.
- the first electrode pattern is circular, and a hole without an electrode is provided in the center thereof, and the second electrode pattern is disposed in the hole. I have.
- the first electrode pattern when the first electrode pattern is formed in a circular shape, a through-hole portion without an electrode is provided in the center portion, and the second electrode pattern is disposed in the through-hole portion.
- the circular first electrode pattern completely surrounds the entire periphery of the second electrode pattern on which the LED chip is mounted, and the edge of the outer peripheral circle of the first electrode pattern is completely free from any breaks in the middle of the circle.
- the circular first electrode pattern and the second electrode pattern in the hole formed in the first electrode pattern are metal films, so that the light emitted from the LED chip is directed away from the wiring board. It is a reflection of reflection.
- the lens rest can be formed into a predetermined shape, and Variations in shape can be reduced, and since there is no need for a dam ring surrounding the lens body as in the prior art, there is an effect that the brightness of light can be increased.
- the second aspect relates to the structure of the light emitting device, wherein the first electrode pattern and the second electrode pattern formed of a metal film on the surface of the wiring board are mounted on the second electrode pattern.
- the first electrode pattern is circular, and a central hole is provided with a hole without an electrode, while the second electrode pattern is formed in a plurality, and each of the second electrode patterns is formed.
- each of the second electrode patterns is provided.
- the metal wire for electrically connecting the L E D chip mounted on emissions and the first electrode pattern and characterized in that arranged so as to extend radially in the radially outward.
- the metal wire for each LED chip extends radially outward and radially outward, so that the first electrode pattern is formed.
- the outward flow of the liquid dropped in the transparent synthetic resin in the radial direction in the transparent synthetic resin is substantially the same at each of the metal wires, and the transparent synthetic resin of the liquid surely spreads in a perfect circle.
- a similar effect can be obtained in a light emitting device having two LED chips.
- a power supply for electrically connecting to the back surface of the wiring board and to the first electrode pattern and the second electrode pattern through through holes in the wiring board.
- the first electrode pattern may be provided with an entry portion between the second electrode patterns at an inner peripheral portion of the hole in the first electrode pattern. Since the light reflecting surface at the point can be enlarged to a portion between the second electrode patterns, it is possible to further increase the light luminance.
- a third aspect of the present invention relates to a method for manufacturing a light-emitting device, comprising: forming a first electrode pattern of a metal film in a circular shape on a wiring board; Forming a second electrode pattern of a metal film in the through hole; mounting an LED chip on the second electrode pattern; and providing a metal wire between the LED chip and the first electrode pattern. And electrically connecting the first electrode pattern to the first electrode pattern, and curing the liquid synthetic resin by dropping the transparent synthetic resin so as to cover the LED chip and the metal wire and rise up. And forming a lens body.
- FIG. 1 is a plan view showing a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view taken along the line II-II of FIG.
- FIG. 3 is a plan view showing a second embodiment of the present invention.
- FIG. 4 is a sectional view taken along line IV-IV of FIG.
- FIG. 5 is a plan view showing a third embodiment of the present invention.
- FIG. 6 is a sectional view taken along the line VI-VI of FIG.
- FIG. 7 is a perspective view showing a fourth embodiment of the present invention.
- FIG. 8 is a plan view showing a main part of the fourth embodiment.
- FIG. 9 is a sectional view taken along the line IX-IX of FIG.
- FIG. 10 is a plan view showing an example of the prior art.
- FIG. 11 is a sectional view taken along the line XI-XI of FIG.
- FIG. 12 is a cross-sectional view showing another example of the prior art. DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.
- the first embodiment is a case where one LED chip is used.
- reference numeral 11 denotes a wiring board made of an insulator such as a glass epoxy resin (a glass fiber is solidified with an epoxy resin), and the upper surface of the wiring board 11 is made of, for example, copper.
- the first electrode pattern 12 has a diameter of In the center of the first electrode pattern 12, a hole 14 without an electrode is provided, while the second electrode pattern 13 is formed into a small diameter d circle, and the second electrode pattern 13 are independently arranged in the hole 14 in the first electrode pattern 12 in an island shape not connected to the first electrode pattern 12.
- an energizing wiring pattern 15 for the first electrode pattern 12 and an energizing wiring pattern 16 for the second electrode pattern 13 are formed.
- Each of the current-carrying wiring patterns 15 and 16 and the two electrode patterns 12 and 13 are connected to each other through through holes 17 and 18 penetrating through the wiring board 11. Connect with the air.
- the 1_ chip 0 chip 19 is mounted by die bonding, and then this LED chip 19
- the first electrode pattern 12 is electrically connected to the first electrode pattern 12 by wire bonding using a thin metal wire 20.
- a portion of the first electrode pattern 12 (preferably, a substantially central portion of the first electrode pattern 12) of the upper surface of the wiring board 11 is formed by a well-known potting method by a conventional method.
- An appropriate amount of transparent synthetic resin such as epoxy resin is dropped in a liquid state.
- the circular first electrode pattern 12 completely surrounds the entire periphery of the second electrode pattern 13 on which the LED chip 19 is mounted, and the outer periphery of the first electrode pattern 12.
- the edge of the circle is a continuous circle that is completely closed without any breaks in the middle of the circle, and the liquid transparent synthetic resin dripped onto this circle has a circular first electrode pattern. After spreading outward in the radial direction along the upper surface of the first electrode pattern 12, it reaches the edge of the outer peripheral circle of the first electrode pattern 12, and the surface tension causes the total of the edge of the outer peripheral circle to It will rise almost hemispherically without protruding.
- the liquid transparent synthetic resin raised as described above is cured by heating, or cured by irradiation of ultraviolet rays or the like, so that the substantially hemispherical lens body 21 is replaced with the lens body 2.
- the LED chip 19 and the metal wire 20 can be packaged.
- FIG. 3 and FIG. 4 show a second embodiment.
- This second embodiment is a case where two LED chips 19a and 19a 'emitting the same color or different colors are used.
- reference numeral 11a denotes a wiring board made of an insulator.
- a first electrode pattern 12a made of a metal film is formed in the same manner as in the first embodiment.
- two second electrode patterns 13a and 13a ' are formed on the upper surface of the wiring board 11a.
- the first electrode pattern 12a has a circular shape with a diameter D, and a hole 14a without an electrode is provided in the center of the first electrode pattern 12a.
- the two second electrode patterns 13a, 13a ' are made small circles with a small diameter d, and the two second electrode patterns 13a, 13a' are replaced with the first electrode pattern 12 A circle s having a radius r centered on or near the center of the circle in the first electrode pattern 12a in a plan view (FIG. 3) in the hole 14a at a, that is, the circle
- the first electrode patterns 12a are arranged at equal intervals along the circumferential direction of a substantially concentric circle s, and are independently arranged in an island shape.
- a current-carrying wiring pattern 15a electrically connected to the first electrode pattern 12a via a through hole 17a, and the both second electrode patterns 13 a, 13 a ′, one of the second electrode patterns 13 a, a conducting wiring pattern 16 a electrically connected to the 13 a via the through hole 18 a, and the other second electrode pattern 1
- An energizing wiring pattern 16a 'electrically connected to the 3a' through the through hole 18a ' is formed.
- each of the space between the LED chips 19a, 19a 'and the first electrode pattern 12a is electrically connected by wire bonding with thin metal wires 20a, 20a'.
- the two metal wires 20a, 20a ' extend from the LED chips 19a, 19a' in each of them in directions opposite to each other in a plan view (FIG. 3). That is, they are disposed so as to extend radially outward in the radial direction.
- a portion of the first electrode pattern 12a (preferably, substantially at the center of the first electrode pattern 12a) out of the upper surface of the wiring board 11a. )
- a suitable amount of transparent synthetic resin is dropped in a liquid state, and this liquid transparent synthetic resin is raised into a substantially hemispherical shape and cured in this state to obtain a substantially hemispherical lens body 21.
- a can be formed by packaging the two LED chips 19 a, 19 a ′ and the metal wires 20 a, 20 a ′ with the lens body 21 a.
- the metal wires 20a, 20a 'for the two LED chips 19a, 19a' extend in opposite directions to each other, that is, extend outward in the radial direction.
- the radially outward flow of the liquid dropped on the first electrode pattern 12 a in the transparent synthetic resin is generated at the positions of the metal wires 20 a and 20 a ′. Therefore, the liquid transparent synthetic resin surely spreads in a perfect circle when seen in a plan view (FIG. 3).
- a portion of the inner periphery of the hole 14a of the first electrode pattern 12a has a portion 12a 'between the first electrode patterns 13a and 13a'. 12a ".
- the light-reflecting surface of the first electrode pattern 12a can be provided to each second electrode pattern 1a. It can be extended to the part between 3a and 13a '.
- FIG. 5 and FIG. 6 show a third embodiment.
- reference numeral 11b denotes a wiring board made of an insulator, and a first electrode pattern made of a metal film is formed on the upper surface of the wiring board 11b as in the first and second embodiments. 1 2 b and three second electrode patterns 13 b, ⁇ 3 b ′ and 13 b ′′ are formed.
- the first electrode pattern 12 b has a circular shape with a diameter D, and a hole 14 b without an electrode is provided at the center of the first electrode pattern 12 b.
- the three second electrode patterns 13 b, 13 b ′, and 13 b ” are each formed into a circle having a small diameter d, and each of the second electrode patterns 13 b, 13 b ′, and 13 b” is formed.
- the center of the circle in the first electrode pattern 12b or the radius r around the vicinity thereof in plan view (FIG. 5) is shown in plan view (FIG. 5) is shown.
- the circles s that is, the circular first electrode patterns 12b and the concentric circles s are arranged independently in an island shape at substantially equal intervals of about 20 degrees along the circumferential direction of the circle s.
- a current-carrying wiring pattern 15b electrically connected to the first electrode pattern 12b via a through hole 17b, and each of the second electrode patterns 13 b, 13 b ′, 13 b ”, one of the second electrode patterns 13 b, a current-carrying wiring pattern 16 b electrically connected through a through hole 18 b to another —Electrification wiring pattern 16 b ′ electrically connected to two second electrode patterns 13 b ′ through through holes 18 b ′, and another second electrode pattern 13 b Then, a current-carrying wiring pattern 16b "electrically connected to the semiconductor device via a through hole 18b" is formed.
- One of the second electrode patterns 13b, 13b 'and 13b " is provided with a red light-emitting LED chip 19b and another one of the first electrodes 13b, 13b' and 13b".
- the electrode pattern 13 b ′ has a green light emitting LED chip 19 b ′, and the other second electrode pattern 13 b ”has a blue light emitting LED chip 19 b ''.
- each of the LED chips 19 b, 19 b ', 19 b "and the first electrode pattern 12 b are connected to a thin metal wire 20 b, 20 b' , 20 b ".
- the metal wires 2Ob, 20b ', 20b are arranged so as to extend radially outward in a plan view (FIG. 5).
- the first electrode pattern 12b (preferably, the first electrode pattern 12b) on the upper surface of the wiring board 11b.
- a suitable amount of transparent synthetic resin is dropped in a liquid state, and the liquid transparent synthetic resin is raised substantially in a hemispherical shape and cured in this state.
- the LED chips 19 b, 19 b ′, 19 b ”and metal wires 20 b, 20 b ′, 20 b” Can be formed in a package.
- the metal wires 2Ob, 20b ', 20b "for each of the LED chips 19b, 19b', 19b" should extend radially outward. Accordingly, the flow of the liquid dropped on the first electrode pattern 12b in the radially outward direction in the transparent synthetic resin is caused by the flow of each of the metal wires 2Ob, 20b 'and 20b ". Since the positions are substantially the same, the transparent synthetic resin of the liquid surely spreads in a perfect circle in plan view (FIG. 5).
- the second electrode patterns 13 b, 13 are provided in the first electrode pattern 12 b at the inner peripheral portion of the hole 14 b. b ', 1 3 b "is provided with an insertion portion 1 2 b'. This insertion portion 1 2 b ' With this arrangement, the light reflecting surface of the first electrode pattern 12 b can be enlarged to the portion between the second electrode patterns 13 b, 13 b ′ and 13 b ”.
- FIG. 7, FIG. 8 and FIG. 9 show a fourth embodiment.
- a large number of light emitting devices 22 having the configuration according to the third embodiment are provided on one common wiring board 23 in a matrix in the vertical and horizontal directions. As a whole, this is a case where the panel is configured to display characters or images in full color using the three primary colors of light.
- the conductor pattern 24 is entirely provided on the surface of the common wiring board 23 except for the circular first electrode pattern 12 b in each light emitting device 22, and the first electrode A ring-shaped gap 25 is formed between the light-emitting device 12 and the pattern 1 2 b, and a circular first electrode pattern 12 b in each of the light-emitting devices 12 is shared with the conductor pattern 24.
- the configuration is such that electrical connection is made via a current-carrying wiring pattern 26 formed on the back surface side of the wiring board 23 and through holes 27, 28, 29.
- the surface of the conductor pattern 24 is covered with an insulating film 30 as shown by a two-dot chain line.
- a ring-shaped gap 25 is provided between the first electrode pattern ⁇ 2 b and the conductor pattern 24 in each light emitting device 22, and the first electrode pattern 1 2 b is completely It has the above-mentioned effect because it has a circular shape.
- This is advantageous in that the structure of the current-carrying wiring pattern for each light-emitting device 22 can be simplified, and that the entire conductor pattern 24 can be a light reflecting surface.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Led Device Packages (AREA)
- Formation Of Insulating Films (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/505,845 US7126159B2 (en) | 2002-03-05 | 2003-03-03 | Plural leds mounted within a central cutout of a surrounding circular reflective electrode |
EP03743566A EP1482567A4 (en) | 2002-03-05 | 2003-03-03 | ELECTROLUMINESCENT DEVICE COMPRISING A LED CHIP AND METHOD OF MANUFACTURING THE SAME |
KR1020037016751A KR100862985B1 (ko) | 2002-03-05 | 2003-03-03 | 발광다이오드칩을 사용한 발광장치 및 그 제조방법 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002059122A JP3801931B2 (ja) | 2002-03-05 | 2002-03-05 | Ledチップを使用した発光装置の構造及び製造方法 |
JP2002/59122 | 2002-03-05 |
Publications (1)
Publication Number | Publication Date |
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WO2003075367A1 true WO2003075367A1 (fr) | 2003-09-12 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/002448 WO2003075367A1 (fr) | 2002-03-05 | 2003-03-03 | Dispositif electroluminescent comprenant une puce a del et procede de fabrication de celui-ci |
Country Status (5)
Country | Link |
---|---|
US (1) | US7126159B2 (ja) |
EP (1) | EP1482567A4 (ja) |
JP (1) | JP3801931B2 (ja) |
KR (1) | KR100862985B1 (ja) |
WO (1) | WO2003075367A1 (ja) |
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Also Published As
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KR100862985B1 (ko) | 2008-10-13 |
US7126159B2 (en) | 2006-10-24 |
KR20040093383A (ko) | 2004-11-05 |
EP1482567A9 (en) | 2005-11-02 |
EP1482567A4 (en) | 2010-03-31 |
JP2003258313A (ja) | 2003-09-12 |
US20050122031A1 (en) | 2005-06-09 |
JP3801931B2 (ja) | 2006-07-26 |
EP1482567A1 (en) | 2004-12-01 |
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