CN106025038A - Preparation method for LED packaging substrate - Google Patents

Preparation method for LED packaging substrate Download PDF

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Publication number
CN106025038A
CN106025038A CN201610395147.4A CN201610395147A CN106025038A CN 106025038 A CN106025038 A CN 106025038A CN 201610395147 A CN201610395147 A CN 201610395147A CN 106025038 A CN106025038 A CN 106025038A
Authority
CN
China
Prior art keywords
pedestal
packaging substrate
ceramic
packaging
layer
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
CN201610395147.4A
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Chinese (zh)
Inventor
赵龙
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.)
Shenzhen Chao Weida Technology Co ltd
Original Assignee
Shenzhen Chao Weida Technology 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 Shenzhen Chao Weida Technology Co ltd filed Critical Shenzhen Chao Weida Technology Co ltd
Priority to CN201610395147.4A priority Critical patent/CN106025038A/en
Priority to PCT/CN2016/094072 priority patent/WO2017206333A1/en
Publication of CN106025038A publication Critical patent/CN106025038A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier 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 with at least one potential-jump barrier or surface barrier 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 with at least one potential-jump barrier or surface barrier 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 with at least one potential-jump barrier or surface barrier 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier 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 with at least one potential-jump barrier or surface barrier 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
    • H01L33/50—Wavelength conversion elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier 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 with at least one potential-jump barrier or surface barrier 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
    • H01L33/50—Wavelength conversion elements
    • H01L33/507—Wavelength conversion elements the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier 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 with at least one potential-jump barrier or surface barrier 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
    • H01L33/58—Optical field-shaping elements
    • H01L33/60—Reflective elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier 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 with at least one potential-jump barrier or surface barrier 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
    • H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
    • H01L2933/0008—Processes
    • H01L2933/0033—Processes relating to semiconductor body packages
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
    • H01L2933/0008—Processes
    • H01L2933/0033—Processes relating to semiconductor body packages
    • H01L2933/0041—Processes relating to semiconductor body packages relating to wavelength conversion elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
    • H01L2933/0008—Processes
    • H01L2933/0033—Processes relating to semiconductor body packages
    • H01L2933/0058—Processes relating to semiconductor body packages relating to optical field-shaping elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
    • H01L2933/0008—Processes
    • H01L2933/0033—Processes relating to semiconductor body packages
    • H01L2933/0066—Processes relating to semiconductor body packages relating to arrangements for conducting electric current to or from the semiconductor body

Abstract

The invention discloses a preparation method for an LED packaging substrate. The LED packaging substrate comprises a packaging substrate which is used for protecting and supporting an LED chip, a reflective layer which is positioned on the packaging substrate, a light conversion layer which is positioned on the reflective layer, and the LED chip which is positioned on the optical conversion layer and has no packaging substrate, wherein the LED chip can emit lights with special wavelengths in a bidirectional manner. The packaging substrate disclosed by the invention is characterized by comprising the light conversion layer, so that the packaging process is simplified; meanwhile, the large-batch production of the packaging substrates containing uniform phosphor powder can be realized by the preparation process; and in addition, the yield and the productivity of the product are improved.

Description

A kind of preparation method of LED package substrate
Technical field
The present invention relates to base plate for packaging based on light emitting diode and preparation method thereof, particularly relate to containing light-converting material Base plate for packaging.
Background technology
Solid state lighting, particularly light emitting diode (LED) due to its life-span length, pollution-free, light efficiency is high the most more and more Replace fluorescent lamp/electric filament lamp etc. and become the light source of a new generation.It is all monochromatic light owing to being directly produced the LED prepared, obtain Obtain white light, it is necessary to have multiple color mixing to be formed.The most frequently used mode preparing white light LEDs is to utilize blue ultraviolet light LED Exciting light transition material, LED self light sent and the complementary light through light conversion layer conversion are collectively forming white light.
The preparation flow of existing LED package is: provide a LED package substrate, by LED chip die bond at base plate for packaging On, on chip, coat fluorescent material, then baking molding after routing again.The blue light sent from LED chip after phosphor powder layer, Part is converted into gold-tinted after being absorbed by fluorescent material, forms white light after blue light.
The step of encapsulation procedure most critical is to coat fluorescent material, and no matter prior art is a glue or dusts, There is its unsurmountable shortcoming.Point glue mode be with point gum machine on the base plate for packaging of solid good LED chip in advance respectively on The fluorescent glue prepared.Due to the fluctuation (pressure, voltage etc.) of point gum machine board, cause the glue put on every LEDs chip not to the utmost Identical.Simultaneously as the sedimentation of fluorescent material, the concentration of contained fluorescent material on every LEDs chip is caused also to be not quite similar.This 2 point Ultimately cause with batch color point differences of the White-light LED chip manufactured, produce bad.It addition, point gum machine speed for dispensing glue is relatively Slowly, when high-volume manufactures, production capacity is limited.The mode coating fluorescent material although dusting makes moderate progress in terms of color dot homogeneity, but Area owing to dusting every time is very big, and the edge of sample to be painted can cause the biggest waste.Meanwhile, powder spraying apparatus is expensive, and stand carries Cost to every packaging body uprises.
Summary of the invention
It is an object of the invention to simplify LED and encapsulate flow process, the shortcoming improving existing fluorescent material coating method, mainly pass through When preparing base plate for packaging, fluorescent material is prepared on substrate so that encapsulation only need to complete die bond, routing processing procedure.
For reaching this purpose, the present invention provides a pedestal, and it is for carrying the remainder of base plate for packaging；At described base Deposition of reflective layer on seat, for reflecting light that is that LED chip sends and that launch after being absorbed by fluorescent material；On described reflecting layer The light conversion layer of preparation, its blue light sent towards base plate for packaging for absorbing LED chip is also converted into gold-tinted.So chip is upward The blue light sent is mixed together into white light with the gold-tinted being reflected layer reflection.
In one embodiment, described pedestal is base of ceramic, arranges circuit the most in advance, for follow-up use Time with LED chip turn on；Then it is used as reflecting layer at described base of ceramic plated surface reflectorized material.Wherein, at described pedestal electricity Conductive material is plated, such as silver etc. on road.Insulant is plated, such as DBR etc. at remaining position；Finally, by ceramic fluorescent powder sheet alignment patch Close on base of ceramic, sinter molding at 500 DEG C-1000 DEG C；Wherein, the described pre-drilled through hole of ceramic fluorescent powder sheet, and Conductive material is inserted in through hole.
In one embodiment, first provide a ceramic fluorescent powder sheet, be drilled through hole thereon, and insert in through hole and lead Electric material；Make at described ceramic fluorescent powder sheet back side insulant and cut off hurdle, separate positive and negative electrode through hole；At described pottery Plating conduction reflectorized material in the phosphor sheet back side is used as reflecting layer, such as silver etc.；Under the reflector layer at the described ceramic fluorescent powder sheet back side (more than 100 microns) conductive layer of plating thick layer, is used for protecting support phosphor sheet and reflecting layer, plays the effect of pedestal.This system Making method to be characterised by, described conduction reflector layer and thick conductive layer are all spaced apart at positive and negative electrode through hole with described partition hurdle.
In one embodiment, it is provided that a pedestal, it arranges groove, circuit and pedestal in advance.Groove is used In placing phosphor powder layer；Circuit and pedestal electrically connect for being formed with LED chip；Reflectorized material is plated at described base-plates surface As reflecting layer.Described pedestal circuit plates conductive material, such as silver etc..Insulant is plated, such as DBR etc. at remaining position；Will The fluorescent glue prepared is coated, at 100 DEG C of-500 DEG C of baking moldings at described base-plates surface；Grind/cutting planarization fluorescent glue table Face, exposes pedestal.
Although describe the present invention hereinafter in connection with some exemplary enforcements and using method, but people in the art Member is to be understood that, it is no intended to limit the invention to these embodiments.Otherwise, it is intended to cover and be included in appended claim All succedaneum, correction and equivalent in spirit and scope of the invention defined in book.
Accompanying drawing explanation
Accompanying drawing is for providing a further understanding of the present invention, and constitutes a part for description, with embodiments of the invention one Rise and be used for explaining the present invention, be not intended that limitation of the present invention.Additionally, accompanying drawing data are to describe summary, it is not drawn to scale.
Fig. 1 is the schematic cross-section of embodiment 1.
Fig. 2 is the preparation flow figure of embodiment 1.
Fig. 3 is the schematic cross-section of embodiment 2.
Fig. 4 is the preparation flow figure of embodiment 2.
Fig. 5 is the schematic cross-section of embodiment 3.
Fig. 6 is the preparation flow figure of embodiment 3.
In figure, each label represents:
101 base of ceramic
102 ceramic bodies
Circuit under 103 base of ceramic
Circuit on 104 base of ceramic
105 base of ceramic interior bone conductive poles
106 collets
107,207 Ag reflecting layer
108,208 DBR reflecting layer
109,209 ceramic fluorescent powder sheet
110, the hole conductive post within 210 ceramic fluorescent powder sheets
212 conductive bases
301 pedestals
The base body of 302 insulation
303 circuit
304 pedestals
305 white reflection paints
306 fluorescent glues
307 grooves
Detailed description of the invention
Describe embodiments of the present invention in detail below with reference to drawings and Examples, whereby how the present invention is applied Technological means solves technical problem, and the process that realizes reaching technique effect can fully understand and implement according to this.Need explanation As long as not constituting conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other, The technical scheme formed is all within protection scope of the present invention.
Embodiment 1:
The single base plate for packaging schematic cross-section of the embodiment 1 of preparation well cutting is as shown in Figure 1.Its preparation flow such as figure Shown in 2, first provide a base of ceramic 101 well prepared in advance.Described base of ceramic comprises ceramic body 102, lower surface electricity Road 103, upper surface circuit 104, the hole conductive post 105 within base of ceramic of connection upper and lower surface circuit, the most same table The circuit in face separates with collets 106；Base of ceramic material can be aluminium oxide, aluminium nitride etc., it is preferred that with aluminium oxide as base Seat.The material of upper and lower surface and hole conductive post can be the one in copper silver gold or alloy, it is preferred that with copper for conduction material Matter.Material used by collets 106 is aluminium oxide.
Then plate reflecting layer at described base of ceramic upper surface, described upper surface circuit 104 plates conducting reflective material Material, it is preferred that silver-plated 107；Described collets 106 plate insulant, it is preferred that plating DBR.S11 is permissible for its embodiment Be: 1) first whole face plate DBR；2) outputing figure on DBR with photoresist, collets top stops with photoresist, circuit position Come out；3) DBR layer exposed is etched；4) deposition Ag layer.5) photoresist is removed.Described DBR material is silicon oxide and oxidation The combination of titanium.
Finally, as shown at s 12, it is provided that a ceramic fluorescent powder sheet 109 well prepared in advance, its internal post Han hole conductive 110.Described ceramic fluorescent powder sheet 109 alignment is fitted on base of ceramic 101, sinter molding at 500 DEG C-1000 DEG C, excellent Choosing, at 850 DEG C of sintering.
Base plate for packaging of the present invention is one-body molded by pedestal and ceramic fluorescent powder sheet, and each position is combined, structural strength Higher, conduction and heat conductivility are more excellent.Meanwhile, the fluorescent material coating method of the present invention is not required to enterprising at different package supports respectively Row coating, reduces the problem that conventional point glue mode color point differences is big, is more suitable for high-volume and makes production.Finally, LED sends out dorsad The blue light gone out stroke in phosphor sheet is the twice of its thickness.Therefore, it can change out more with thinner fluorescent material Gold-tinted.
Embodiment 2:
The single base plate for packaging schematic cross-section of the embodiment 2 of preparation well cutting is as shown in Figure 3.Its preparation flow such as figure Shown in 4, it is provided that a ceramic fluorescent powder sheet 209 well prepared in advance, it is internal containing hole conductive post 210.
Then, as shown in S21, make at described ceramic fluorescent powder sheet 209 back side insulant and cut off hurdle 208, separate Positive and negative electrode through hole.Preferably, we select the DBR of plating insulation at this, such as silicon oxide and the combination of titanium oxide.Its embodiment For: 1) first whole face plate DBR；2) on DBR, output figure with photoresist, need the region of insulation to stop with photoresist, need to lead Come out in the position of electricity；3) DBR layer exposed is etched；
Then, as shown at s 22, in retaining S21 step under conditions of photoresist, further at the back of the body of ceramic fluorescent powder sheet Face deposition Ag layer is as reflecting layer.
Finally, as shown in S23, in retaining S21 step under conditions of photoresist, further at the back of the body of ceramic fluorescent powder sheet (more than 100 microns) conductive layer of face deposition thick layer, is used for protecting support phosphor sheet and reflecting layer, plays the work of pedestal With.The material of conductive layer is copper silver gold or its alloy.Preferably, conductive layer is greater than DBR layer with the gross thickness of Ag reflector layer Thickness.
The present embodiment is the scaled-down version of embodiment 1, owing to saving base of ceramic, on cost advantageously.
Embodiment 3:
The single base plate for packaging schematic cross-section of the embodiment 3 of preparation well cutting is as shown in Figure 5.Its preparation flow such as figure Shown in 6, it is provided that a pedestal 301, it arranges groove 307, circuit 303 and pedestal 304 in advance.Preferably, pedestal Material selection engineering plastics, such as PPA, EMC etc.；Circuit and pedestal select copper.
Then, as shown in S31, it is used as reflecting layer at described pedestal 301 surface Selective coating reflectorised paint.Described reflectorised paint It is coated in the base-plates surface except pedestal.
Then, as shown in S32, in the fluorescent glue 306 that described pedestal 301 surface-coated prepares, 150 DEG C of bakings in baking box Molding in four hours.
Finally, grind/cutting planarization fluorescent glue surface, expose pedestal.

Claims (1)

1. the preparation method of a LED package substrate, it is characterised in that following steps:
1) providing a pedestal, it arranges groove, circuit and pedestal in advance, groove is used for placing phosphor powder layer；Circuit Electrically connect for being formed with LED chip with pedestal；
2) it is used as reflecting layer at described base-plates surface reflectorized material.Described pedestal circuit plates conductive material, such as silver etc..At it Remaining part position plating insulant, such as reflectorised paint, DBR etc.；
3) by coating the fluorescent glue prepared at described base-plates surface, at 100 DEG C of-500 DEG C of baking moldings；
4) grind/cutting planarization fluorescent glue surface, expose pedestal.
CN201610395147.4A 2016-06-02 2016-06-02 Preparation method for LED packaging substrate Pending CN106025038A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201610395147.4A CN106025038A (en) 2016-06-02 2016-06-02 Preparation method for LED packaging substrate
PCT/CN2016/094072 WO2017206333A1 (en) 2016-06-02 2016-08-09 Preparation method for led package substrate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610395147.4A CN106025038A (en) 2016-06-02 2016-06-02 Preparation method for LED packaging substrate

Publications (1)

Publication Number Publication Date
CN106025038A true CN106025038A (en) 2016-10-12

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Country Status (2)

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CN (1) CN106025038A (en)
WO (1) WO2017206333A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017206332A1 (en) * 2016-06-02 2017-12-07 深圳朝伟达科技有限公司 Preparation method for led package substrate

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104091875A (en) * 2014-07-04 2014-10-08 厦门市三安光电科技有限公司 LED packaging structure

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004207369A (en) * 2002-12-24 2004-07-22 Stanley Electric Co Ltd Surface mounting type white led
CN103178165B (en) * 2011-12-21 2015-10-07 展晶科技(深圳)有限公司 Light-emitting Diode And Its Making Method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104091875A (en) * 2014-07-04 2014-10-08 厦门市三安光电科技有限公司 LED packaging structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017206332A1 (en) * 2016-06-02 2017-12-07 深圳朝伟达科技有限公司 Preparation method for led package substrate

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Application publication date: 20161012