CN104393161A - Wafer level package structure for semiconductor device - Google Patents
Wafer level package structure for semiconductor device Download PDFInfo
- Publication number
- CN104393161A CN104393161A CN201410673474.2A CN201410673474A CN104393161A CN 104393161 A CN104393161 A CN 104393161A CN 201410673474 A CN201410673474 A CN 201410673474A CN 104393161 A CN104393161 A CN 104393161A
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- silicon
- led chip
- metal layer
- semiconductor device
- insulating barrier
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 35
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 117
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 117
- 239000010703 silicon Substances 0.000 claims abstract description 117
- 229910052751 metal Inorganic materials 0.000 claims abstract description 114
- 239000002184 metal Substances 0.000 claims abstract description 114
- 239000000758 substrate Substances 0.000 claims abstract description 37
- 230000004888 barrier function Effects 0.000 claims description 44
- 239000000463 material Substances 0.000 claims description 28
- 238000004891 communication Methods 0.000 claims description 7
- 238000007788 roughening Methods 0.000 claims description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 238000003475 lamination Methods 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 239000004332 silver Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 abstract description 8
- 239000010410 layer Substances 0.000 description 90
- 238000000034 method Methods 0.000 description 43
- 238000005538 encapsulation Methods 0.000 description 19
- 238000010586 diagram Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 238000007747 plating Methods 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- MSNOMDLPLDYDME-UHFFFAOYSA-N gold nickel Chemical compound [Ni].[Au] MSNOMDLPLDYDME-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000000741 silica gel Substances 0.000 description 5
- 229910002027 silica gel Inorganic materials 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000000605 extraction Methods 0.000 description 4
- 238000001259 photo etching Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920001187 thermosetting polymer Polymers 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 238000012536 packaging technology Methods 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007540 photo-reduction reaction Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010023 transfer printing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/44—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 coatings, e.g. passivation layer or anti-reflective coating
- H01L33/46—Reflective coating, e.g. dielectric Bragg reflector
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/64—Heat extraction or cooling elements
- H01L33/642—Heat extraction or cooling elements characterized by the shape
-
- 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
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/12—Structure, shape, material or disposition of the bump connectors prior to the connecting process
- H01L2224/14—Structure, shape, material or disposition of the bump connectors prior to the connecting process of a plurality of bump connectors
-
- 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
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump connector 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
- H01L2224/16221—Disposition the bump connector 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
- H01L2224/16225—Disposition the bump connector 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
-
- 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
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Led Device Packages (AREA)
Abstract
The invention discloses a wafer level package structure for a semiconductor device, and belongs to the technical field of semiconductor package. The wafer level package structure comprises a silicon-based substrate and an LED (light-emitting diode) chip with a positive electrode and a negative electrode, an insulating layer I is arranged on the upper surface of the silicon-based substrate, an insulating layer II is arranged on the lower surface of the silicon-based substrate, the area ratio of the cross section of the silicon-based substrate to that of the LED chip is minimally 1.5:1, a rewiring metal layer is arranged on the upper surface of the insulating layer I, the LED chip is inverted on the surface of the rewiring metal layer, at least two silicon through holes are formed outside a vertical area of the LED chip, at least two conducting electrodes are arranged on the lower surface of the insulating layer II and selectively cover the corresponding silicon through holes, an euphotic layer for packaging the LED chip is arranged above the silicon-based substrate, and the surface of the euphotic layer is roughened. The wafer level package structure for the semiconductor device is smaller in size, lower in thermal resistance, lower in cost and higher in brightness for the chip with the same size.
Description
Technical field
The present invention relates to a kind of wafer-level package structure of semiconductor device, belong to technical field of semiconductor encapsulation.
Background technology
Such as the light-emitting element chip of light-emitting diode (Ligh1t-Emitting Diode is called for short LED) forms by PN junction the semiconductor device that light emitting source launches the light of shades of colour.Along with the development of electronic technology, the packaging density of the sub-product of LED electrical requires more and more higher.In theory, when base plate for packaging thickness is less, corresponding packaging thermal resistance value is less, and the node temperature of LED chip operation is lower, and the electric light transformation efficiency of chip is higher, and the brightness of LED chip is higher.
Therefore, in a sense, miniaturized is to the unremitting pursue that market low cost requires when ensureing LED chip high brightness with low-heat resistance.Traditional ceramic substrate and the LED encapsulation structure of lead frame, it is subject to the restriction of Substrate manufacture ability on package dimension, be difficult to make a breakthrough in LED is miniaturized, conventional package area compares at more than 2:1 with the cross section of LED chip area, thus cause packaging cost to be difficult to lower, and its thermal resistance value comes from the difference of substrate conductive coefficient in 8-15 DEG C/W(difference), electric light transformation efficiency is roughly 25% to 45%.Therefore the conventional package form being representative with ceramic packaging and lead frame is difficult to realize miniaturization, this take into account of low-heat resistance, high brightness, low cost.
Summary of the invention
The encapsulation that the object of the invention is to overcome above-mentioned conventional semiconductor devices is not enough, provides the wafer-level package structure of the semiconductor device that a kind of encapsulating structure size of comparable size chip is less, thermal resistance value is lower, cost is lower and brightness is higher.
the object of the present invention is achieved like this:
The encapsulating structure of a kind of semiconductor device of the present invention, it comprises silicon-based substrate and the LED chip with positive and negative electrode, the upper surface of described silicon-based substrate is insulating barrier I, lower surface is insulating barrier II, and the most I of area ratio of the cross section of described silicon-based substrate and LED chip reaches 1.5:1
The upper surface of described insulating barrier I arranges interconnection metal layer again, the outermost layer of described interconnection metal layer is again silver layer or aluminium lamination, described LED chip upside-down mounting is in the surface of interconnection metal layer again, described interconnection metal layer more separately forms the layer pattern of wiring metal again I insulated from each other and wiring metal layer pattern II again between the positive and negative electrode of this LED chip
At least two silicon through holes are set outside the vertical area of described LED chip, described silicon through hole runs through silicon-based substrate, insulating barrier I and insulating barrier II up and down, its inwall arranges insulating barrier III, the longitudinal section of described silicon through hole is inverted trapezoidal, and its big opening end is towards insulating barrier I, osculum end towards insulating barrier II
The described layer pattern of wiring metal again I and again wiring metal layer pattern II extend out to the silicon through hole of homonymy respectively, and are covered with the bottom of its inwall and osculum end thereof,
The lower surface of described insulating barrier II arranges at least two conductive electrodes, described conductive electrode optionally covers corresponding silicon through hole, and be connected with wiring metal layer pattern I, again wiring metal layer pattern II again respectively by the osculum end of silicon through hole, realize electrical communication
The top of described silicon-based substrate arranges photic zone, described photic zone encapsulating LED chip, and its exiting surface is the plane of surface through roughening treatment.
Outside the long end that silicon through hole of the present invention is arranged at the positive and negative electrode of LED chip, outside short end, a kind of or several arbitrarily combination of cornerwise epitaxial-side.
Euphotic exiting surface of the present invention is covered with the micro-recesses of even density or miniature pit.
The thickness h 1 of silicon-based substrate of the present invention is below 200 microns.
Further, the thickness h 1 of described silicon-based substrate is 70 ~ 100 microns.
The bore of the osculum end of silicon through hole of the present invention is not less than 20 microns.
Positive and negative electrode of the present invention and arrange metal derby between interconnection metal layer again, the scope of the height h2 of described metal derby is 3 ~ 20 microns.
Further, the scope of the height h2 of described metal derby is 7 ~ 12 microns.
The exiting surface coating fluorescent material of LED chip of the present invention.
The present invention also comprises heat conduction electrode, and described heat conduction electrode is arranged between conductive electrode or its side, and is placed in immediately below LED chip.
The invention has the beneficial effects as follows:
1, silicon through hole is arranged at outside the vertical area of LED chip by encapsulating structure of the present invention, and the dominant heat conduction electrode of plane of flattening sum setting position is set at its back side, efficiently solve reliability and the heat dissipation problem of the encapsulating structure of semiconductor device LED chip, reduce thermal resistance value; Meanwhile, be thinned the thickness of silica-based body further, reduce the thickness of encapsulating structure, also contribute to reducing thermal resistance value; And surface coarsening technique is adopted to photic zone, form microstructure, improve light extraction efficiency, therefore the brightness of semiconductor device of the present invention is significantly improved.
2, encapsulating structure of the present invention adopts wafer level silicon substrate pinboard technique in silicon wafer, complete the arrangement of insulating barrier, conductive electrode, silicon through hole, again interconnection metal layer etc., and reserve upside-down mounting region for LED chip, the encapsulating structure size achieving comparable size chip is less, reach package area and be minimal to 1.5:1 with the cross section ratio of chip area, and conventional package area and the cross section of LED chip area compare at more than 2:1, significantly reduce the size of encapsulating structure, reduce production cost simultaneously, meet the miniaturization trend of encapsulating structure.
accompanying drawing explanation
Fig. 1 is the flow chart of the wafer-level encapsulation method of a kind of semiconductor device of the present invention;
Fig. 2-1 be the embodiment one of a kind of small-sized LED encapsulation structure of the present invention overlook (front) schematic diagram;
Fig. 2-2 is the A-A generalized section of Fig. 2-1;
Fig. 2-3 is the B-B generalized section of Fig. 2-1;
What Fig. 2-4 to Fig. 2-9 was Fig. 2-2 looks up (back side) schematic diagram;
Fig. 2-10 is the distortion schematic diagram of Fig. 2-2;
Fig. 2 A to Fig. 2 O is the schematic flow sheet of the method for packing of the embodiment of the present invention one;
Fig. 3-1 be the embodiment two of a kind of small-sized LED encapsulation structure of the present invention overlook (front) schematic diagram;
What Fig. 3-2 was Fig. 3-1 looks up (back side) schematic diagram;
Fig. 3-3 be the distortion of Fig. 3-1 look up (back side) schematic diagram;
Fig. 4-1 be the embodiment three of a kind of small-sized LED encapsulation structure of the present invention overlook (front) schematic diagram;
Fig. 4-2 is the C-C generalized section of Fig. 4-1;
What Fig. 4-3 was Fig. 4-1 looks up (back side) schematic diagram;
Fig. 4-4 is the distortion one of Fig. 4-1;
Fig. 4-5 is the distortion two of Fig. 4-1;
Fig. 5-1 be the embodiment four of a kind of small-sized LED encapsulation structure of the present invention overlook (front) schematic diagram;
What Fig. 5-2 was Fig. 5-1 looks up (back side) schematic diagram;
Fig. 6-1 is the distortion of Fig. 5-1;
What Fig. 6-2 was Fig. 6-1 looks up (back side) schematic diagram;
Wherein, silicon-based substrate 1
Silicon through hole 11
Insulating barrier I 121
Big opening end 1211
Insulating barrier II 122
Osculum end 1221
Depression 13
Wiring metal layer pattern I 21 again
Wiring metal layer pattern II 22 again
Conductive electrode I 321
Conductive electrode II 322
Heat conduction electrode 323
Metal derby 41,42
LED chip 5
Fluorescent material 6
Photic zone 7;
Silicon wafer 10
Thinning face 111
Insulating barrier I opening 1211
Input/output terminal 3211,3221
The upside-down mounting region 50 of chip
Carrier disk 81
Adhesive 811.
Embodiment
See Fig. 1, the technological process of the wafer-level encapsulation method of a kind of semiconductor device of the present invention is as follows:
S101: get silicon wafer;
S102: adopt wafer level silicon substrate pinboard technique to complete the arrangement of insulating barrier, conductive electrode, silicon through hole, again interconnection metal layer etc. in silicon wafer, and reserve upside-down mounting region for LED chip;
S103:LED flip-chip is to upside-down mounting region;
S104: form the photic zone covering LED chip, and roughening treatment is carried out on euphotic surface;
S105: the packaging body silicon wafer completing packaging technology being cut into single semiconductor device.
Describe the present invention more fully hereinafter with reference to accompanying drawing now, exemplary embodiment of the present invention shown in the drawings, thus scope of the present invention is conveyed to those skilled in the art by the disclosure fully.But the present invention can realize in many different forms, and should not be interpreted as being limited to the embodiment set forth here.
Embodiment one, see Fig. 2-1 to Fig. 2-10
The encapsulating structure of semiconductor device LED, as shown in Fig. 2-2 and Fig. 2-3, is respectively A-A profile and the B-B profile of Fig. 2-1.Insulating barrier I 121 is set at the upper surface of silicon-based substrate 1, lower surface arranges insulating barrier II 122, insulating barrier I 121 can be identical with the material of insulating barrier II 122, its material, including, but not limited to silicon oxide film, insulate to make the silicon-based substrate 1 with semiconducting behavior.The upper surface of insulating barrier I 121 is the layer pattern of wiring metal again I 21, again wiring metal layer pattern II 22 insulated from each other, wiring metal layer pattern I 21, the again material of wiring metal layer pattern II 22 are generally made up of metallic copper again, its outermost layer is that the silver layer, aluminium lamination (not shown) etc. of smooth planar are with high reflectance and the good metal level of electric conductivity, to strengthen the light reflected intensity of LED product, improve the emitting brightness of LED product.LED chip 5 upside-down mounting in wiring metal layer pattern I 21 again and again wiring metal layer pattern II 22 surface and with wiring metal layer pattern I 21 again and again wiring metal layer pattern II 22 across being connected.LED chip 5 with positive electrode 51, negative electrode 52, then wiring metal layer pattern I 21 and again wiring metal layer pattern II 22 to separate between positive electrode 51 and the negative electrode 52 of this LED chip 5 and insulated from each other, to avoid LED chip 5 short circuit.At positive electrode 51 and metal derby I 41 can be arranged between wiring metal layer pattern I 21 again, at negative electrode 52 and metal derby II 42 can be arranged between wiring metal layer pattern II 22 again, the material of metal derby I 41, metal derby II 42 is generally copper, but its material is not limited to this.On it, two ends are provided with solder metal (not shown), be generally metallic tin or ashbury metal, its thickness is no more than 5 microns, tinbase intermetallic compound is formed, to strengthen LED chip 5 and wiring metal layer pattern I 21, connection reliability again between wiring metal layer pattern II 22 again after LED chip 5 completes reverse installation process.
Shape of cross section and the size of metal derby I41, metal derby II 42 are determined according to actual needs.Usually the shape of cross section, in the same size of its shape of cross section, size and positive electrode 51, negative electrode 52.Metal derby I 41 is generally equal with the height of metal derby II 42, and the scope of height h2 is 3 ~ 20 microns, with altitude range be 7 ~ 12 microns for good, meet miniaturized encapsulating structure needs to realize that it supports, while conductive force.
Two silicon through holes 11 are set outside the vertical area of LED chip 5, as shown in Fig. 2-1, Fig. 2-4, Fig. 2-5, Fig. 2-6.Silicon through hole about 11 runs through silicon-based substrate 1, insulating barrier I 121 and insulating barrier II 122, the longitudinal section of silicon through hole 11 is inverted trapezoidal, and its big opening end 1211 is towards insulating barrier I 121, osculum end 1221 towards insulating barrier II 122, as shown in Fig. 2-2, Fig. 2-3, the bore of its osculum end 1221 is not less than 20 microns, is good with the bore of osculum end 1221 at 30 microns, to ensure the electric reliability connected, reduce technology difficulty simultaneously, and then reduce production cost.Silicon through hole 11 can be arranged at outside the short end of the electrode 51 of LED chip 5, negative electrode 52, as shown in Fig. 2-1.The particular location of silicon through hole 11 outside the upside-down mounting region of LED chip 5 is determined according to actual needs.The inwall of silicon through hole 11 arranges insulating barrier III 123, and insulating barrier III 123 can be independently rete, and as shown in Fig. 2-2, material is silicon oxide film, but material is not limited to this.Insulating barrier III 123 can be the part that insulating barrier I 121 extends in silicon through hole 11, is structure as a whole with insulating barrier I 121.Wiring metal layer pattern I 21, again wiring metal layer pattern II 22 extend out to the silicon through hole 11 of homonymy respectively again, and along the surface coverage silicon through hole 11 of insulating barrier III 123 inwall and be deposited on the bottom of osculum end 1221 of silicon through hole 11, and leave a slight depression 13 in the central authorities of silicon through hole 11.
Silicon through hole 11 also can be arranged within the vertical area of LED chip 5, but due to each diverse nature of layer material of existence and silicon through hole 11 place and the subsequent operation of packaging technology of this depression 13, the connection reliability of each layer in silicon through hole 11 place and upper and lower parts (as interconnection metal layer, metal derby, LED chip 5, conductive electrode again) may be reduced, especially again interconnection metal layer and LED chip 5 or metal derby, connection reliability again between interconnection metal layer and conductive electrode.
The lower surface of the insulating barrier II 122 of silicon-based substrate 1 arranges conductive electrode I 321 and conductive electrode II 322, as shown in Fig. 2-1, Fig. 2-3 and Fig. 2-4.The material of conductive electrode I 321 and conductive electrode II 322 is including, but not limited to copper; its surface can but inessential setting first form nickel dam and form the nickel-gold layer of layer gold or tin layers again as protective layer; nickel-gold layer or tin layers are formed by the method for plating or chemical plating, be oxidized and meet the requirement of soldering reliability to prevent copper surface.Conductive electrode I 321 and conductive electrode II 322 optionally cover silicon through hole 11, and be connected respectively by osculum end 1221 with the layer pattern of wiring metal again I 21, again wiring metal layer pattern II 22 in silicon through hole 11, conductive electrode 321 realizes electrical communication by the layer pattern of wiring metal again I 21 in silicon through hole 11 with positive electrode 51, and conductive electrode 322 realizes electrical communication by the layer pattern of wiring metal again II 22 in silicon through hole 11 with negative electrode 52.The shape of conductive electrode I 321 and conductive electrode II 322 is generally sizeable rectangle, to mate with existing substrate, reduces technology difficulty simultaneously.
The photic zone 7 of the top of silicon-based substrate 1 covers and protects LED chip 5, its exiting surface be surface through the plane of roughening treatment, the magnification region I(a as the region I of Fig. 2-2), I(b), I(c) shown in.This surface coarsening technique can make the surface roughening of exiting surface, effectively to weaken the total reflection effect photoreduction process, improving extraction efficiency, improves the emitting brightness of LED product further.Particularly, it is the micro-recesses being covered with even density at the exiting surface of photic zone 7, as shown in the V-shaped groove (as I(a) that extends in parallel), shown in the deep-slotted chip breaker (as I(b) that extends in parallel) etc., bearing of trend, extension track (straight or song) of groove have arbitrariness, or the miniature pit (as I(c) being even density is shown), but microstructure is not limited thereto, require that the even density of roughening treatment is that the performance (as optical parametrics such as brightness) of encapsulating products in order to ensure LED reaches unanimity.
Photic zone 7 must select the good material of light transmission, toughness, as the epoxy resin etc. of silica gel, optical grade, to protect LED chip 5, and is conducive to beam projecting.In addition, photic zone 7 can adjust the directivity of the light launched from LED chip 5 or color.Although photic zone 7 is smooth in Fig. 2-2,2-3, the present invention is not limited thereto.Photic zone 7 also can have various shape, such as, and concavees lens and convex lens.But the smooth exiting surface of photic zone 7 can realize ultra-thin, miniaturized purpose of design better.Depression 13 while of photic zone 7 in filling silicon through holes 11, because depression 13 is very little, the outermost layer of wiring metal layer pattern I 21, again wiring metal layer pattern II 22 is the silver layer or the aluminium lamination that strengthen light reflection again, therefore the light-out effect of existence to whole LED of depression 13 does not impact, namely can not leave obvious light dark space, at least naked eyes cannot distinguish.
In order to solve the heat dissipation problem of LED product, the lower surface of silicon-based substrate 1 can also arrange heat conduction electrode 323, and its shape does not have particular/special requirement, is made generally in sizeable rectangle, to reduce technology difficulty, as shown in Fig. 2-2, Fig. 2-3, Fig. 2-5 and Fig. 2-6.The material of heat conduction electrode 323 including, but not limited to copper, its surface can but inessential nickel-gold layer or the tin layers of arranging as protective layer, wherein, nickel-gold layer is first form the double-layer structure that nickel dam forms layer gold again.This protective layer is also formed by the method for plating or chemical plating, is oxidized and meets the requirement of soldering reliability to prevent copper surface.In order to play heat conduction, the heat sinking function of heat conduction electrode 323 to greatest extent, heat conduction electrode 323 is to be placed in for good immediately below LED chip 5, because closely heat dissipation channel can be made shorter near LED chip 5, thermal resistance value is less, and heat dispersion is more stable.Particularly, heat conduction electrode 323 can be arranged between conductive electrode I 321 and conductive electrode II 322, as shown in Figure 2-5; Or be arranged at the side of conductive electrode I 321 and conductive electrode II 322, as shown in figures 2-6.The extension area of usual heat conduction electrode 323 is greater than the extension area of conductive electrode 321 and/or conductive electrode 322, also can play its heat conduction, heat sinking function better.
The positive electrode 51 of LED chip 5, negative electrode 52 can distinguish a corresponding silicon through hole 11, and as shown in Fig. 2-1 to Fig. 2-6, silicon through hole 11 is positioned at the wherein side outside the short end of positive electrode 51, negative electrode 52.
The positive electrode 51 of LED chip 5, negative electrode 52 can distinguish corresponding two silicon through holes 11, as shown in Fig. 2-7 to Fig. 2-9.Two silicon through holes 11 lay respectively at the wherein side outside the short end of positive electrode 51, negative electrode 52, and these two silicon through holes 11 can walk abreast transversely arranged, as illustrated in figs. 2-7, also can walk abreast longitudinal arrangement, as illustrated in figs. 2 through 8, or can be staggered, as shown in figs. 2-9.
According to the difference of the compound semiconductor materials for the formation of LED chip 5, this LED chip 5 can launch blue light, green light or red light.And LED chip 5 also can be launched does not have coloured ultraviolet (UV) light.In daily life, people use white light.In order to obtain white light, can to select to turn blue the LED chip 5 of coloured light, and apply fluorescent material 6 at the exiting surface of LED chip 5, formation is coated to five exiting surfaces of LED chip 5, fluorescent material 6 can be extended down to the upper surface of interconnection metal layer 21,22 outward again, formed and the part of interconnection metal layer 21,22 is again covered, as shown in Fig. 2-2, Fig. 2-3; Or cover completely, the depression 13 simultaneously in filling silicon through holes 11, as shown in figs. 2-10, to adapt to wafer level production technology, reduce technology difficulty.
Fluorescent material 6 is as yellow fluorescent powder, gold-tinted is sent by blue-light excited yellow fluorescent powder, and then with LED chip 5 the some blue light sent out mix and obtain white light, or use yellow fluorescent powder to obtain warm white with mixing of a small amount of red fluorescence powder, the encapsulating structure of white light or warm white LED is as shown in Fig. 2-2, Fig. 2-10.
Photic zone 7 also can comprise fluorescent material.Suitably can select fluorescent material according to required color, fluorescent material can be dispersed in the light transmissive material for the formation of photic zone 7.
Although photic zone 7 is individual layers in the foregoing description, the present invention is not limited thereto.Alternatively, according to application, photic zone 7 can have the sandwich construction comprising two-layer or more layer.
The technical process of the wafer-level encapsulation method of the semiconductor device LED of this embodiment is as follows:
Step one, get silicon wafer, the insulating barrier 120,122 of the equal SiO deposit film material of front and back of described silicon wafer, plays insulation protection effect, as shown in Figure 2 A.
Step 2, sequentially pass through sputtering, photoetching, plated metal technique, the conductive electrode group 321,322 of array arrangement is completed in the front of silicon wafer, the end of described conductive electrode group 321,322 is the input/output terminal 3211,3221 of conductive electrode, outside the short end that the input/output terminal 3211,3221 of described conductive electrode is arranged at the positive and negative electrode of LED chip 5 as shown in Fig. 2 A and 2A '.
The remaining region of the input/output terminal 3211,3221 of described conductive electrode is the upside-down mounting region 50 of reserved chip; Sequentially pass through sputtering, photoetching, plated metal technique simultaneously, between conductive electrode or its side, and form heat conduction electrode 323 immediately below LED chip 5.The surface of described conductive electrode and heat conduction electrode 323 forms first shaping nickel dam by the method for chemical plating and reshapes the nickel-gold layer of layer gold or form tin layers by the method for chemical plating.
Step 3, complete the front of silicon wafer of conductive electrode group by the interim bonded support disk 81 of adhesive 811; As shown in Figure 2 B.
Step 4, upper and lower 180 ° of upsets complete the silicon wafer of interim bonding, and the back side of thinning silicon wafer forms thinning face 111, the thickness h 1 of silicon-based substrate 1 reduces to less than 200 microns, the thinlyyest reduces to 70 ~ 100 microns, to meet the needs of small-sized encapsulated structure.As shown in Fig. 2 C, 2D.
Step 5, input/output terminal 3211,3221 place at corresponding conductive electrode, thinning face 111 sequentially passes through photoetching, dry etch process from top to bottom etch silicon wafer, forms silicon through hole 11; Described silicon through hole 11 is opened in outside the vertical area of LED chip 5, its longitudinal section is inverted trapezoidal, and its big opening end 1211 is towards LED chip 5, osculum end 1221 towards conductive electrode 321,322, the bore of the osculum end 1221 of described silicon through hole 11 is generally not less than 20 microns, to reduce technology difficulty, save production cost.As shown in Figure 2 E.
Step 6, in silicon through hole and another insulating barrier 121 of the surface deposition in thinning face 111; As shown in Figure 2 F.
Step 7, offer insulating layer openings 1211 by laser technology or dry etch process in the bottom of silicon through hole 11, expose the input/output terminal 3211,3221 of conductive electrode; As shown in Figure 2 G.
Step 8, to sequentially pass through sputtering on the surface of the insulating barrier 121 completing insulating layer openings 1211, interconnection metal layer again 21,22 that photoetching, electroplating technology form array arrangement, in the upside-down mounting region 50 of chip adjacent two again interconnection metal layer 21 with interconnection metal layer 22 is insulated from each other again; As illustrated in figure 2h.The outermost layer of interconnection metal layer I 21, again interconnection metal layer II 22 sputters silver layer or aluminium lamination (not shown), to improve the exitance of light again.And by plating or the method for chemical plating, at positive electrode 51 and form metal derby I 41 between wiring metal layer pattern I 21 again, at negative electrode 52 and form metal derby II 42 between wiring metal layer pattern II 22 again, as shown in figure 2i.The material of metal derby I 41, metal derby II 42 is generally copper, and its upper end generally forms by electric plating method metallic tin or the ashbury metal that thickness is no more than 5 microns.
Shape of cross section and the size of metal derby I41, metal derby II41 are determined according to actual needs.Usually the shape of cross section, in the same size of its shape of cross section, size and positive electrode 51, negative electrode 52.Metal derby I 41 is generally equal with the height of metal derby II 42, and the scope of height h2 is 3 ~ 20 microns, with altitude range h2 be 7 ~ 12 microns for good, meet miniaturized encapsulating structure needs to realize that it supports, while conductive force.
Step 9, get LED chip 5, by LED chip 5 upside-down mounting in the upside-down mounting region 50 of chip and LED chip 5 and the interconnection metal layer again I 21 in the upside-down mounting region 50 of chip be all connected with interconnection metal layer II 22 again, in the process, the not thick metallic tin of the upper end of metal derby I 41, metal derby II 42 or ashbury metal and adjacent metal form tinbase intermetallic compound, to strengthen LED chip 5 and interconnection metal layer I 21, connection reliability again between interconnection metal layer II 22 again; As shown in fig. 2j.
Step 10, arrange sufficiently high box dam 9 at the edge of the silicon wafer completing flip-chip, in described box dam 9, click and enter the thermosetting resins such as silica gel and levelling, described thermosetting resin covers LED chip 5, and thermosetting resin becomes photic zone 7 through Post RDBMS of heating; As shown in Fig. 2 K, Fig. 2 L.The material of box dam 9 is including, but not limited to being silica gel.Also step was comprised: at the exiting surface coating fluorescent material 6 of described LED chip 5, as the colloid mixture that the glue such as fluorescent material and silica gel is mixed to form click and enter the thermosetting resins such as silica gel in described box dam 9 before; Fluorescent material 6 also can whole spraying, half tone also can be used to cover spraying, then by wafer-level test colour temperature, carry out suitable benefit powder.
Step 11, after photic zone 7 is shaped, remove box dam 9; As shown in figure 2m.
Step 12, utilize surface coarsening technique that roughening treatment is carried out on the surface of photic zone 7, described surface coarsening technique is that the upper surface of photic zone 7 is carried out mechanical polishing, make the upper surface of the photic zone after rubbing down 7 in the Non-smooth surface face with equally distributed microstructure, to improve light extraction efficiency, its microstructure is as shown in Fig. 2-2, as: machining head selects V-arrangement cutter head, by the upper surface of the process High Rotation Speed V-arrangement cutter head delineation photic zone 7 of setting, form equally distributed V-shaped groove (as shown in the figure II (a) of Fig. 2 M); Or utilize laser dotting technique, make the miniature pit (as shown in the figure II (c) of Fig. 2 M) of even density at the upper surface of photic zone 7.Surface coarsening technique is not limited to the method for mechanical polishing or laser dotting, additive method, as the methods such as dry etching, mantle transfer printing also can realize the microstructure of the upper surface of photic zone 7, to improve light extraction efficiency.
Step 13, employing are torn bonding technology open and are removed carrier disk 81 and adhesive 811, and attachment is on scribing film 82; As shown in figure 2n.
Step 14, the silicon wafer completing packaging technology on scribing film 82 is cut into the packaging body of single semiconductor device.As shown in Figure 2 O.
Embodiment two
As shown in Fig. 3-1 to Fig. 3-3, the difference of this embodiment and embodiment one is:
The positive electrode 51 of LED chip 5, negative electrode 52 can distinguish corresponding two silicon through holes 11, and these two silicon through holes 11 lay respectively at outside the short end of positive electrode 51, negative electrode 52, as shown in Fig. 3-1 and 3-2.Conductive electrode I 321 and conductive electrode II 322 and positive electrode 51, the parallel distribution of negative electrode 52, cover two silicon through holes 11 of positive electrode 51, negative electrode 52 homonymy respectively, and realize electrical communication with the positive electrode 51 of homonymy, negative electrode 52.
The positive electrode 51 of LED chip 5, negative electrode 52 can distinguish corresponding two or more silicon through hole 11, then wiring metal layer pattern I 21, again wiring metal layer pattern II 22 are done to adjust accordingly to connect silicon through hole 11.As shown in Fig. 3-3.
The technical process of the wafer-level encapsulation method of the semiconductor device of this embodiment and the wafer-level encapsulation method of embodiment one similar.
Embodiment three
As shown in Fig. 4-1 to Fig. 4-5, the difference of this embodiment and embodiment two, embodiment three is:
Silicon through hole 11 is arranged at outside the long end of positive electrode 51, negative electrode 52, as shown in Fig. 4-1, Fig. 4-2.The particular location of silicon through hole 11 outside the upside-down mounting region of LED chip 5 is determined according to actual needs.The positive electrode 51 of LED chip 5, negative electrode 52 can distinguish corresponding two silicon through holes 11, wiring metal layer pattern I 21, again wiring metal layer pattern II 22 can be communicated with two silicon through holes 11 of homonymy respectively in back-to-back U-shaped again, two silicon through holes 11 can distribute side by side, as shown in Fig. 4-4, also can be interspersed.Conductive electrode I 321 and conductive electrode II 322 and positive electrode 51, the parallel distribution of negative electrode 52, cover two silicon through holes 11 of positive electrode 51, negative electrode 52 homonymy respectively, and realize electrical communication with the positive electrode 51 of homonymy, negative electrode 52.
The positive electrode 51 of LED chip 5, negative electrode 52 can distinguish corresponding two or more silicon through hole 11, then wiring metal layer pattern I 21, again wiring metal layer pattern II 22 are done to adjust accordingly to connect silicon through hole 11.As illustrated in figures 4-5.
Heat conduction electrode 323 can but inessential setting, as shown in Fig. 4-2,4-3.Be arranged at immediately below LED chip 5 as good with heat conduction electrode 323, conductive electrode I 321 and conductive electrode II 322 are arranged at the both sides of heat conduction electrode 323, the extension area of heat conduction electrode 323 is greater than the extension area of conductive electrode 321 and/or conductive electrode 322, to play its heat conduction, heat sinking function better, as shown in Fig. 4-3.
The technical process of the wafer-level encapsulation method of the semiconductor device of this embodiment and the wafer-level encapsulation method of embodiment one similar.
Embodiment four
As shown in Fig. 5-1 to Fig. 5-2, the difference of this embodiment and above embodiment is:
Silicon through hole 11 can be arranged at cornerwise epitaxial-side, and as shown in fig. 5-1, the particular location of silicon through hole 11 outside the upside-down mounting region of LED chip 5 is determined according to actual needs.Wiring metal layer pattern I 21, again wiring metal layer pattern II 22 can be communicated with two silicon through holes 11 of homonymy respectively in back-to-back U-shaped again.Conductive electrode I 321 and conductive electrode II 322 and positive electrode 51, the parallel distribution of negative electrode 52, cover two silicon through holes 11 of positive electrode 51, negative electrode 52 homonymy respectively, and realize electrical communication with the positive electrode 51 of homonymy, negative electrode 52.
Heat conduction electrode 323 is arranged between conductive electrode I 321 and conductive electrode II 322, as shown in Fig. 5-2, the extension area of usual heat conduction electrode 323 is greater than the extension area of conductive electrode 321 and/or conductive electrode 322, also can play its heat conduction, heat sinking function better.
The technical process of the wafer-level encapsulation method of the semiconductor device of this embodiment and the wafer-level encapsulation method of embodiment one similar.
Embodiment five
As shown in Fig. 6-1 to Fig. 6-2, the difference of this embodiment and above embodiment is:
Outside the long end that silicon through hole 11 can be arranged at positive electrode 51, negative electrode 52, outside short end, cornerwise epitaxial-side two or three combination, as shown in Fig. 6-1 and Fig. 6-2, to increase electric information channel, meet actual needs.
The technical process of the wafer-level encapsulation method of the semiconductor device of this embodiment and the wafer-level encapsulation method of embodiment one similar.
Silicon-based substrate 1 of the present invention and insulating barrier I 121, insulating barrier II 122, again interconnection metal layer, metal derby adopt wafer level silicon substrate pinboard technique to be formed, therefore the silicon-based substrate than traditional is thinner, thickness h 1 generally below 200 microns, even can reach 70 ~ 100 microns.Meanwhile, the most I of the area ratio of silicon-based substrate 1 and the cross section of LED chip 5 reaches 1.5:1, and the LED chip 5 being applicable to smaller szie encapsulates, the size significantly reduced, and meets the miniaturized application trend of LED product.And its thermal resistance value is roughly at 3-5 DEG C/W, effectively improve electric light transformation efficiency, therefore the product of the far super equal model of its brightness.
The encapsulating structure of a kind of semiconductor device LED of the present invention is not limited to above preferred embodiment, the positive electrode 51 of LED chip 5 or negative electrode 52 can corresponding multiple metal derbies, when small-sized encapsulated LED chip 5 size, because the size of LED chip 5 reduces, a metal derby is answered to be good with the electrode pair of a LED chip 5, the contact-making surface of metal derby and electrode is large as far as possible, is beneficial to heat radiation.
The number of conductive electrode also can in two or more, with the convenience of the flexibility and use that increase encapsulation.
Therefore, any those skilled in the art without departing from the spirit and scope of the present invention, any amendment done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all fall in protection range that the claims in the present invention define.
Claims (10)
1. an encapsulating structure for semiconductor device, it comprises silicon-based substrate (1) and the LED chip (5) with positive and negative electrode, and the upper surface of described silicon-based substrate (1) is insulating barrier I (121), lower surface is insulating barrier II (122),
It is characterized in that: the most I of the area ratio of the cross section of described silicon-based substrate (1) and LED chip (5) reaches 1.5:1,
The upper surface of described insulating barrier I (121) arranges interconnection metal layer again, the outermost layer of described interconnection metal layer is again silver layer or aluminium lamination, described LED chip (5) upside-down mounting is in the surface of interconnection metal layer again, described interconnection metal layer more separately forms the layer pattern of wiring metal again I (21) insulated from each other and wiring metal layer pattern II (22) again between the positive and negative electrode of this LED chip (5)
At least two silicon through holes (11) are set outside the vertical area of described LED chip (5), described silicon through hole (11) runs through silicon-based substrate (1), insulating barrier I (121) and insulating barrier II (122) up and down, its inwall arranges insulating barrier III (123), the longitudinal section of described silicon through hole (11) is inverted trapezoidal, and its big opening end (1211) is towards insulating barrier I (121), osculum end (1221) towards insulating barrier II (122)
The described layer pattern of wiring metal again I (21) and again wiring metal layer pattern II (22) extend out to the silicon through hole (11) of homonymy respectively, and are covered with the bottom of its inwall and osculum end (1221) thereof,
The lower surface of described insulating barrier II (122) arranges at least two conductive electrodes, described conductive electrode optionally covers corresponding silicon through hole (11), and respectively by the osculum end (1221) of silicon through hole (11) with wiring metal layer pattern I (21), again wiring metal layer pattern II (22) are connected again, realize electrical communication
The top of described silicon-based substrate (1) arranges photic zone (7), described photic zone (7) encapsulating LED chip (5), and its exiting surface is the plane of surface through roughening treatment.
2. the encapsulating structure of semiconductor device according to claim 1, is characterized in that: outside the long end that described silicon through hole (11) is arranged at the positive and negative electrode of LED chip (5), outside short end, a kind of or several arbitrarily combination of cornerwise epitaxial-side.
3. the encapsulating structure of semiconductor device according to claim 2, is characterized in that: the exiting surface of described photic zone (7) is covered with the micro-recesses of even density or miniature pit.
4. the encapsulating structure of the semiconductor device according to claim 1 or 2 or 3, is characterized in that: the thickness h 1 of described silicon-based substrate (1) is below 200 microns.
5. the encapsulating structure of semiconductor device according to claim 4, is characterized in that: the thickness h 1 of described silicon-based substrate (1) is 70 ~ 100 microns.
6. the encapsulating structure of the semiconductor device according to claim 1 or 2 or 3, is characterized in that: the bore of the osculum end (1221) of described silicon through hole (11) is not less than 20 microns.
7. the encapsulating structure of the semiconductor device according to claim 1 or 2 or 3, is characterized in that: described positive and negative electrode and arrange metal derby between interconnection metal layer again, and the scope of the height h2 of described metal derby is 3 ~ 20 microns.
8. the encapsulating structure of semiconductor device according to claim 7, is characterized in that: the scope of the height h2 of described metal derby is 7 ~ 12 microns.
9. the encapsulating structure of the semiconductor device according to claim 1 or 2 or 3, is characterized in that: exiting surface coating fluorescent material (6) of described LED chip (5).
10. the encapsulating structure of the semiconductor device according to claim 1 or 2 or 3, is characterized in that: also comprise heat conduction electrode (323), and described heat conduction electrode (323) is arranged between conductive electrode or its side, and is placed in immediately below LED chip (5).
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Application publication date: 20150304 |