CN106876567A - Height radiating diode package structure - Google Patents

Height radiating diode package structure Download PDF

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Publication number
CN106876567A
CN106876567A CN201710144653.0A CN201710144653A CN106876567A CN 106876567 A CN106876567 A CN 106876567A CN 201710144653 A CN201710144653 A CN 201710144653A CN 106876567 A CN106876567 A CN 106876567A
Authority
CN
China
Prior art keywords
heat conduction
backlight unit
substrate
conduction bar
diode chip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710144653.0A
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Chinese (zh)
Inventor
董志强
侯志刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gulf Semiconductor (Shandong) Co Ltd
Original Assignee
Gulf Semiconductor (Shandong) Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gulf Semiconductor (Shandong) Co Ltd filed Critical Gulf Semiconductor (Shandong) Co Ltd
Priority to CN201710144653.0A priority Critical patent/CN106876567A/en
Publication of CN106876567A publication Critical patent/CN106876567A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00Semiconductor 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
    • H01L33/48Semiconductor 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
    • H01L33/64Heat extraction or cooling elements
    • H01L33/642Heat extraction or cooling elements characterized by the shape
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00Semiconductor 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
    • H01L33/48Semiconductor 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
    • H01L33/58Optical field-shaping elements
    • H01L33/60Reflective elements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00Semiconductor 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
    • H01L33/48Semiconductor 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
    • H01L33/64Heat extraction or cooling elements
    • H01L33/644Heat extraction or cooling elements in intimate contact or integrated with parts of the device other than the semiconductor body

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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)

Abstract

The invention discloses a kind of radiating diode package structure high, including substrate, radiating piece, diode chip for backlight unit, negative pin and packing colloid, diode chip for backlight unit and radiating piece are respectively and fixedly connected with the opposing sides of substrate, positive pole pin and negative pin are electrically connected with diode chip for backlight unit, substrate, radiating piece and diode chip for backlight unit are packaged in packing colloid, also include reflecting drum and multiple heat conduction bars, reflecting drum is coated on packing colloid, multiple heat conduction bars are arranged around diode chip for backlight unit, each heat conduction bar is embedded in packing colloid, the end of each heat conduction bar is fixed on substrate, the outer wall of each heat conduction bar is reflector layer.The radiating diode package structure high that the present invention is provided, heat conduction bar in packing colloid transfers heat to substrate, heat is distributed by radiating piece by substrate, heat conduction bar is launched the light that diode chip for backlight unit is sent out by the reflector layer of its outer wall simultaneously, prevents from being influenceed because heat conduction bar is set the illumination effect of diode chip for backlight unit.

Description

Height radiating diode package structure
Technical field
The present invention relates to semiconductor technology, and in particular to a kind of radiating diode package structure high.
Background technology
Diode package is the semiconductor element on basis, known, and diode package includes substrate, is arranged at substrate On diode chip for backlight unit the positive pole pin and negative pin that are connected with the diode chip for backlight unit, substrate, diode chip for backlight unit and extremely Small part positive pole pin and negative pin are packaged in the packing colloid.
Heat dispersion is the important indicator for influenceing diode package service life and luminous efficacy, diode chip for backlight unit work More heat can be produced during work, in order to distribute the heat, away from the one of diode chip for backlight unit on the most substrate of prior art Side sets radiating piece, such as aluminum products of high thermal conductivity, Al-alloy products, for further improving heat radiation efficiency, is then dissipating It is improved further on the material and structure of warmware, Application No. " 201210062079.1 ", publication date is " 2016.8.23 ", entitled " package structure for LED ", and Application No. " 200980113720.6 ", publication date is " 2013.1.23 ", the patent of entitled " LED package " it is disclosed certain be not such diode package.
The reason for prior art concentrates on the setting radiator structure at the back side (away from the one side of diode chip for backlight unit) of substrate exists In the front (setting the one side of diode chip for backlight unit) of substrate is packing colloid, and packing colloid is transparent configuration, and it is diode core The luminous of piece, cannot set radiator structure inside it.But in actual applications, the radiating piece of substrate back has height mostly The heat-sinking capability of effect, its heat-sinking capability is sufficient, is just the packing colloid for being located at substrate front side, and its thermal conductivity is relatively low and without extra Radiator structure so that its centrostigma for turning into heat and be difficult to fully release, and then influence diode package service life And luminous efficacy.
The content of the invention
It is an object of the invention to provide a kind of radiating diode package structure high, to solve above-mentioned deficiency of the prior art Part.
To achieve these goals, the present invention provides following technical scheme:
A kind of radiating diode package structure high, including substrate, radiating piece, diode chip for backlight unit, positive pole pin, negative pin And packing colloid, the diode chip for backlight unit and radiating piece be respectively and fixedly connected with the opposing sides of the substrate, and the positive pole draws Pin and negative pin are electrically connected with the diode chip for backlight unit, and the substrate, radiating piece and diode chip for backlight unit are packaged in described In packing colloid, also including reflecting drum and multiple heat conduction bars, the reflecting drum is coated on packing colloid, multiple heat conduction bars Around diode chip for backlight unit arrangement, each heat conduction bar is embedded in the packing colloid, and the end of each heat conduction bar is equal It is fixed on the substrate, the outer wall of each heat conduction bar is reflector layer.
Above-mentioned radiating diode package structure high, the one side of the heat conduction bar is curved reflection face, the curved reflection Face is oppositely arranged with the diode chip for backlight unit.
Above-mentioned radiating diode package structure high, the radial dimension that passed through on the heat conduction bar is passed successively Increase, the heat conduction bar is connected on the substrate with the larger one end of its radial dimension.
Above-mentioned radiating diode package structure high, the heat conduction article include that bottom surface and the plane perpendicular set the One side and the second side arranged with the inclined bottom surface, the second side is arcwall face, and the heat conduction bar is with described Second side is oppositely arranged with the diode chip for backlight unit, and the bottom surface fits with the substrate.
Above-mentioned radiating diode package structure high, the outer wall from the diode chip for backlight unit is described to lead to the reflecting drum The arrangement density of hot bar diminishes successively, and the arrangement density refers to the total of the heat conduction bar in packing colloid described in unit volume Volume.
Above-mentioned radiating diode package structure high, the heat conduction bar is inclined or is arranged vertically with the substrate.
Above-mentioned radiating diode package structure high, the substrate includes the central part fitted with the diode chip for backlight unit With the ring part around the central part, the thickness of the central part sets more than the thickness of the ring part on the radiating piece Groove is equipped with, the central part is embedded in the groove.
Above-mentioned radiating diode package structure high, is provided with bonding pad on the substrate, each heat conduction bar is all connected with In on a side of the bonding pad, bulge-structure, the radiating piece are set on relative another side of the bonding pad On be provided with caulking groove with the bulge-structure phase clamping.
Above-mentioned radiating diode package structure high, the bonding pad is located at the marginal portion of the substrate.
Above-mentioned radiating diode package structure high, the bulge-structure is towards away from the direction of the diode chip for backlight unit The structure of extension.
In the above-mentioned technical solutions, the radiating diode package structure high that the present invention is provided, the heat conduction bar in packing colloid Substrate is transferred heat to, heat is distributed by radiating piece by substrate, while the reflector layer that heat conduction bar passes through its outer wall will The light of diode chip for backlight unit hair is launched, in addition packing colloid overcoat reflecting drum, is prevented in terms of two because setting heat conduction bar And influence the illumination effect of diode chip for backlight unit.
Brief description of the drawings
In order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art, below will be to institute in embodiment The accompanying drawing for needing to use is briefly described, it should be apparent that, drawings in the following description are only described in the present invention A little embodiments, for those of ordinary skill in the art, can also obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the front view of radiating diode package structure high provided in an embodiment of the present invention;
Fig. 2 is the top view of radiating diode package structure high provided in an embodiment of the present invention;
Fig. 3 is the structural representation of heat conduction bar provided in an embodiment of the present invention;
Fig. 4 is the structural representation of substrate provided in an embodiment of the present invention;
Fig. 5 is the structural representation of radiating piece provided in an embodiment of the present invention.
Description of reference numerals:
1st, substrate;1.1st, central part;1.2nd, ring part;1.3rd, bonding pad;1.4th, bulge-structure;2nd, radiating piece;2.1st, it is recessed Groove;2.2nd, caulking groove;3rd, diode chip for backlight unit;4th, positive pole pin;5th, negative pin;6th, packing colloid;7th, reflecting drum;8th, heat conduction bar; 8.1st, bottom surface;8.2nd, first side;8.3rd, second side.
Specific embodiment
In order that those skilled in the art more fully understands technical scheme, below in conjunction with accompanying drawing to this hair It is bright to be further detailed.
As Figure 1-5, a kind of radiating diode package structure high provided in an embodiment of the present invention, including substrate 1, radiating Part 2, diode chip for backlight unit 3, positive pole pin 4, negative pin 5 and packing colloid 6, the diode chip for backlight unit 3 and radiating piece 2 are distinguished It is fixed in the opposing sides of the substrate 1, the positive pole pin 4 and negative pin 5 are electrically connected with the diode chip for backlight unit 3, The substrate 1, radiating piece 2 and diode chip for backlight unit 3 are packaged in the packing colloid 6, are also led including reflecting drum 7 and multiple Hot bar 8, the reflecting drum 7 is coated on packing colloid 6, and multiple heat conduction bars 8 are arranged around the diode chip for backlight unit 3, respectively The heat conduction bar 8 is embedded in the packing colloid 6, and the end of each heat conduction bar 8 is fixed on the substrate 1, each institute The outer wall for stating heat conduction bar 8 is reflector layer.
Specifically, diode chip for backlight unit 3 is used to be lighted after connecing electricity, positive pole pin 4 and negative pin 5 are used to be diode chip for backlight unit 3 introduce electric current, and diode chip for backlight unit 3 is fixed on the front of substrate 1, and radiating piece 2 sets the back side of substrate 1 (departing from installation two The one side of pole pipe chip 3) on, radiating piece 2 is the radiator structure manufactured by high thermal conductivity material, such as aluminium, copper and its alloy product, , to substrate 1, substrate 1 is again by the heat transfer to radiating piece 2, radiating for the heat transfer distributed in the course of work of diode chip for backlight unit 3 Part 2 again distributes the heat, so realizes the distributing near the heat of the one end of substrate 1 of diode chip for backlight unit 3.Meanwhile, two poles Most of heat transfer of die 3 is provided with multiple heat conduction bars 8 in packing colloid 6 in packing colloid 6, each heat conduction bar 8 End is connected on substrate 1, and the heat transfer of the part that such diode chip for backlight unit 3 is located in packing colloid 6 gives packing colloid 6, to heat conduction bar 8, the heat transfer of heat conduction bar 8 is to substrate 1, and last heat is same for the most of heat transfer in packing colloid 6 Distributed by radiating piece 2.Likewise, heat conduction bar 8 is manufactured for high thermal conductivity material, due to the thermal conductivity of of packing colloid 6 itself Relatively low, the thermal conductivity of heat conduction bar 8 is higher, and the heat in such packing colloid 6 continuously can be transmitted to the collection coalescence of heat conduction bar 8 Substrate 1.
In the present embodiment, for the light for preventing 8 block diode chip of heat conduction bar 3 from launching, by each heat conduction bar 8 around two Pole pipe chip 3 arranges, so hinders on the direction of substrate 1, having no heat conduction bar 8 on the light emission direction of diode chip for backlight unit 3 Gear, the major part of such diode chip for backlight unit 3 is luminous unaffected, substantial portion of in addition on parallel to the direction of substrate 1 The light of the transmitting of diode chip for backlight unit 3 can be stopped that the present embodiment sets reflector layer on the outer wall of heat conduction bar 8 by heat conduction bar 8, such as plate Silver layer or other ray structures, so reduce luminous blocking effect of the heat conduction bar 8 to diode chip for backlight unit 3 as far as possible, in addition, Reflecting drum 7 is set in the outside of packing colloid 6, packing colloid 6 is surround by reflecting drum 7, reflecting drum 7 is used for reflection light, so Diode chip for backlight unit 3 directly reaches reflecting drum 7 in the light portion of the direction transmitting parallel to substrate 1, is reflected by reflecting drum 7 Go, do not influence or have little influence on the illumination effect of diode chip for backlight unit 3, and another part is reflected by heat conduction bar 8, by heat conduction bar The light portion of 8 reflections is directly reflected away, remaining to reflex to reflecting drum 7, is finally also reflected away by reflecting drum 7.This reality In applying example, it is preferred that heat conduction bar 8 be arranged in parallel with reflecting drum 7 or less parallel is set, so that being reflected by heat conduction bar 8 Light nearly all reflect away, the secondary reflection without may require that reflecting drum 7.
Radiating diode package structure high provided in an embodiment of the present invention, during preparation, first can be welded to base by heat conduction bar 8 On plate 1, the encapsulation of substrate 1, heat conduction bar 8, radiating piece 2 and diode chip for backlight unit 3 is finally carried out, it is also possible to after encapsulating structure, Cavernous structure is opened up on packing colloid 6 by laser-induced thermal etching or other methods until substrate 1, finally inserts in cavernous structure Enter heat conduction bar 8.
Radiating diode package structure high provided in an embodiment of the present invention, heat conduction bar 8 in packing colloid 6 is by heat transfer To substrate 1, heat is distributed by radiating piece 2 by substrate 1, at the same heat conduction bar 8 by the reflector layer of its outer wall by diode The light of the hair of chip 3 is launched, in addition the overcoat reflecting drum 7 of packing colloid 6, is prevented in terms of two because of setting heat conduction bar 8 Influence the illumination effect of diode chip for backlight unit 3.
In the present embodiment, as shown in figure 3, further, the one side of the heat conduction bar 8 is curved reflection face, the arc Reflective surface is oppositely arranged with the diode chip for backlight unit 3, and curved reflection face is anti-for collecting the light that coalescence launches diode chip for backlight unit 3 The outside of packing colloid 6 is mapped to, so that heat conduction bar 8 does not interfere with the illumination effect of diode chip for backlight unit 3 not only, one is entered on the contrary Step lifts its luminous compacting effect.
In the present embodiment, further, the radial dimension that passed through on the heat conduction bar 8 is incremented by successively, institute State heat conduction bar 8 to be connected on the substrate 1 with the larger one end of its radial dimension, the heat of heat conduction bar 8 is from away from substrate 1 End is delivered on substrate 1, therefore the heat that it is transmitted closer to substrate 1 is more, sets the heat conduction bar 8 that radial dimension increases successively Its heat transfer efficiency is lifted, and it is smaller away from one end size of substrate 1, reduce the influence of its illumination effect to diode chip for backlight unit 3.
In the present embodiment, further, the heat conduction bar 8 includes that bottom surface 8.1 and the bottom surface 8.1 are vertically disposed First side 8.2 and the second side 8.3 being in tilted layout with the bottom surface 8.1, the second side 8.3 are arcwall face, institute State heat conduction bar 8 to be oppositely arranged with the diode chip for backlight unit 3 with the second side 8.3, the bottom surface 8.1 and the phase of the substrate 1 Laminating, causes that heat conduction bar 8 is more consolidated with connection such as welding, the grafting of substrate 1 with the vertically disposed first side 8.2 of substrate 1, And inclined second side 8.3 has double action, it is parallel with reflecting drum 7 that one can be set, and makes its reflecting effect preferably, Secondly it causes that heat conduction bar 8 turns into the structure that radial dimension is gradually incremented by with the vertical collective effect of first side 8.2, so allow Heat conduction bar 8 is provided simultaneously with three kinds of technique effects:Firm connection, high reflection efficiency and high-heat conductive efficency.
In the present embodiment, it is preferred that from the outer wall of the diode chip for backlight unit 3 to the reflecting drum 7, the heat conduction bar 8 Arrangement density diminishes successively, and the arrangement density refers to the totality of the heat conduction bar 8 in packing colloid 6 described in unit volume Product, the heat closer to the region gather of diode chip for backlight unit 3 is more, sets more heat conduction bars 8, so as to increase dissipating for the region The thermal efficiency.
In the present embodiment, as shown in Figures 4 and 5, further, the substrate 1 includes being fitted with the diode chip for backlight unit 3 Central part 1.1 and the ring part 1.2 around the central part 1.1, the thickness of the central part 1.1 is more than the ring part 1.2 thickness, sets fluted 2.1 on the radiating piece 2, the central part 1.1 is embedded in the groove 2.1, central part 1.1 Directly it is connected with diode chip for backlight unit 3, more heats that its reception diode chip 3 is distributed, ring part 1.2 receives the center of comparing The less heat in portion 1.1, by set thicker of central part 1.1 so that its heat-sinking capability is stronger, also causes substrate 1 and radiating piece 2 Heat-sinking capability it is more balanced.
In the present embodiment, further, bonding pad 1.3 is provided with the substrate 1, each heat conduction bar 8 is all connected to On one side of the bonding pad 1.3, bulge-structure 1.4 is set on relative another side of the bonding pad 1.3, it is described The caulking groove 2.2 with the phase clamping of the bulge-structure 1.4 is provided with radiating piece 2, heat conduction bar 8 transmits substantial amounts of heat to substrate 1 On, set protrusion means to lift its heat-transfer capability in the region of substrate 1 (bonding pad 1.3) of connection heat conduction bar 8.Preferably, institute Bonding pad 1.3 is stated positioned at the marginal portion of the substrate 1, will be connected to as far as possible away from central part 1.1 and diode chip for backlight unit 3, prevented Only heat gathers with a part, and uniform heat is distributed.
In the present embodiment, further, the bulge-structure 1.4 is to prolong towards the direction away from the diode chip for backlight unit 3 The structure stretched, is set away from diode chip for backlight unit 3, on the one hand causes bulge-structure 1.4 as far as possible away from central part 1.1, on the other hand, Bulge-structure 1.4 turns into the structure being in tilted layout with substrate 1 away from diode chip for backlight unit 3, so as to lift the surface of bulge-structure 1.4 Product, lifts its capacity of heat transmission.
Some one exemplary embodiments of the invention only are described by way of explanation above, undoubtedly, for ability The those of ordinary skill in domain, without departing from the spirit and scope of the present invention, can be with a variety of modes to institute The embodiment of description is modified.Therefore, above-mentioned accompanying drawing and description are inherently illustrative, should not be construed as to the present invention The limitation of claims.

Claims (10)

1. a kind of high radiating diode package structure, including substrate, radiating piece, diode chip for backlight unit, positive pole pin, negative pin with And packing colloid, the diode chip for backlight unit and radiating piece be respectively and fixedly connected with the opposing sides of the substrate, the positive pole pin Electrically connected with the diode chip for backlight unit with negative pin, the substrate, radiating piece and diode chip for backlight unit are packaged in the envelope In dress colloid, it is characterised in that also including reflecting drum and multiple heat conduction bars, the reflecting drum is coated on packing colloid, multiple The heat conduction bar arranges that each heat conduction bar is embedded in the packing colloid, each heat conduction around the diode chip for backlight unit The end of bar is fixed on the substrate, and the outer wall of each heat conduction bar is reflector layer.
2. radiating diode package structure high according to claim 1, it is characterised in that the one side of the heat conduction bar is arc Shape reflective surface, the curved reflection face is oppositely arranged with the diode chip for backlight unit.
3. radiating diode package structure high according to claim 1, it is characterised in that on the heat conduction bar from one end to Other end radial dimension is incremented by successively, and the heat conduction bar is connected on the substrate with the larger one end of its radial dimension.
4. the radiating diode package structure high according to Claims 2 or 3, it is characterised in that the heat conduction bar includes bottom First side and the second side with inclined bottom surface arrangement that face and the plane perpendicular are set, the second side It is arcwall face, the heat conduction bar is oppositely arranged with the second side with the diode chip for backlight unit, the bottom surface and the substrate Fit.
5. radiating diode package structure high according to claim 1, it is characterised in that from the outer of the diode chip for backlight unit Wall is to the reflecting drum, and the arrangement density of the heat conduction bar diminishes successively, described to arrange that density refers to being sealed described in unit volume The cumulative volume of the heat conduction bar in dress colloid.
6. radiating diode package structure high according to claim 1, it is characterised in that the heat conduction bar and the substrate Incline or be arranged vertically.
7. radiating diode package structure high according to claim 1, it is characterised in that the substrate includes and described two Central part and the ring part around the central part that pole pipe chip fits, the thickness of the central part are more than the ring part Thickness, set fluted on the radiating piece, the central part is embedded in the groove.
8. radiating diode package structure high according to claim 1, it is characterised in that connection is provided with the substrate Area, each heat conduction bar is all connected on a side of the bonding pad, is set on relative another side of the bonding pad Bulge-structure is put, the caulking groove with the bulge-structure phase clamping is provided with the radiating piece.
9. radiating diode package structure high according to claim 8, it is characterised in that the bonding pad is located at the base The marginal portion of plate.
10. radiating diode package structure high according to claim 8, it is characterised in that the bulge-structure be towards Away from the structure that the direction of the diode chip for backlight unit extends.
CN201710144653.0A 2017-03-13 2017-03-13 Height radiating diode package structure Pending CN106876567A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710144653.0A CN106876567A (en) 2017-03-13 2017-03-13 Height radiating diode package structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710144653.0A CN106876567A (en) 2017-03-13 2017-03-13 Height radiating diode package structure

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CN106876567A true CN106876567A (en) 2017-06-20

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Citations (5)

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Publication number Priority date Publication date Assignee Title
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Publication number Priority date Publication date Assignee Title
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US20110006322A1 (en) * 2009-07-07 2011-01-13 China Wafer Level Csp Ltd. Wafer-level package structure of light emitting diode and manufacturing method thereof
CN101621107A (en) * 2009-07-30 2010-01-06 深圳市聚飞光电股份有限公司 Light-emitting diode with high light efficiency and encapsulation method thereof
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