CN110010747A - A kind of brush coating device and brush coating method for COB LED encapsulation - Google Patents
A kind of brush coating device and brush coating method for COB LED encapsulation Download PDFInfo
- Publication number
- CN110010747A CN110010747A CN201910273278.9A CN201910273278A CN110010747A CN 110010747 A CN110010747 A CN 110010747A CN 201910273278 A CN201910273278 A CN 201910273278A CN 110010747 A CN110010747 A CN 110010747A
- Authority
- CN
- China
- Prior art keywords
- cob
- brush coating
- steel mesh
- led encapsulation
- fluorescent glue
- 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
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 77
- 239000011248 coating agent Substances 0.000 title claims abstract description 70
- 238000005538 encapsulation Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 61
- 239000010959 steel Substances 0.000 claims abstract description 61
- 239000003292 glue Substances 0.000 claims abstract description 51
- 239000000758 substrate Substances 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 15
- 238000007639 printing Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 4
- 241000252254 Catostomidae Species 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000000465 moulding Methods 0.000 abstract description 4
- 239000000084 colloidal system Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 235000001968 nicotinic acid Nutrition 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/12—Stencil printing; Silk-screen printing
-
- 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
- H01L33/50—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
- H01L2933/0041—Processes relating to semiconductor body packages relating to wavelength conversion elements
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Coating Apparatus (AREA)
Abstract
The invention proposes a kind of brush coating devices and brush coating method for COB LED encapsulation, including base fixture, steel mesh and brush coating cutter, pass through the fixed COB substrate to gluing of base fixture, steel mesh is covered on COB substrate again, deployed fluorescent glue is printed on COB substrate on corresponding light emitting region by the through-hole on steel mesh using brush coating cutter, not only glue amount control is more accurate, yields is higher, and entire brush coating process one-pass molding, process is simple, improve production efficiency, and can one-step print multiple COB substrates, can be realized mass production；In addition, the fluorescent glue for selecting viscosity high, is not easy to precipitate, the consistency of production front and back ensure that.
Description
Technical field
The present invention relates to LED field, more particularly, to a kind of brush coating device for COB LED encapsulation, further relate to using
The method of brush coating device progress brush coating.
Background technique
Existing COB process for filling colloid generally includes following steps: using dispenser, first uses box dam glue box dam, then will be a certain amount of
Glue injection box dam in, glue spreads levelling out by gravity.Existing COB process for filling colloid has the following disadvantages:
(1) dispensing mechanical irrigation glue is used, is limited to dispensing board gel quantity precision, it is poor that product falls BIN consistency；
(2) glue viscosity is low (gravity levelling is relied on after injecting glue), and fluorescent powder easily precipitates, and optical parameter is inclined before and after a tank glue
Difference；
(3) process for filling colloid needs roasting by box dam → short roasting → injecting glue → length, and process is many and diverse.
Summary of the invention
To solve the above problems, also proposed simultaneously the invention proposes a kind of brush coating device for COB LED encapsulation
The method that brush coating is carried out using the brush coating device.
Main contents of the invention include:
A kind of brush coating device for COB LED encapsulation, including multiple brush coating units interconnected, the single brush coating
Unit includes steel mesh, frictioning cutter and base fixture, is provided with COB fixed structure on the base fixture；The steel mesh covers
It covers above COB substrate, several through-holes is offered on the steel mesh, the through-hole and the light emitting region COB correspond；The steel
Net upper side is provided with material position on fluorescent glue；The frictioning cutter is arranged above the steel mesh, and above the steel mesh
It moves back and forth.
Preferably, the base fixture includes jig body, and the COB fixed structure includes COB fixing groove, the COB
Fixing groove is provided in the jig body, and COB fixing groove bottom is provided with several negative pressure suckers.
Preferably, the both ends of the COB fixing groove offer finger groove, the finger groove and the two of the COB fixing groove
End margin connection.
Preferably, the steel mesh includes steel mesh ontology, and organic coating, organic painting are coated with above the steel mesh ontology
The thickness of layer is in 0.15mm between 0.3mm, and the hardness of organic coating is HV800, and roughness is Ra3.2~6.4；It is described
Through-hole runs through the organic coating and the steel mesh ontology.
Preferably, the through-hole wall is coated with the organic coating；The material of the steel mesh ontology is metallic steel.
Preferably, the frictioning cutter includes cutter body and scraper, and the scraper is inclined at the cutter sheet
Below body, the included angle of the scraper and its direction of advance is 55 °.
Preferably, the blade surface is coated with organic coating, and the material of the scraper is metallic steel.
Preferably, the distance between the scraper lower end and the steel mesh are in 0.08mm between 0.12mm.
Preferably, multiple brush coating units are arranged with array manner or multiple base fixtures are integrally formed.
The invention also provides the brush coating methods using the above-mentioned brush coating device for COB LED encapsulation, including walk as follows
It is rapid:
Step 1: allotment fluorescent glue, so that the viscosity of the fluorescent glue is at 10000~14000mPa.s/25 DEG C；
Step 2: stirring deaeration: deployed fluorescent glue being put into vacuum defoamation blender, vacuum defoamation blender turns
Fast subsection setup are as follows: 300r/min 30s, 600r/min 30S, 900r/min 20S, 1200r/min 10S, and vacuum is set
Degree is -90kpa；
Step 3: plasma thermal sprayed technology is used, organic coating is coated on the steel mesh and brush coating cutter,
In, organic coating with a thickness of 0.15~0.3mm, and hardness is HV800, and roughness is Ra3.2~6.4, and resistance to temperature range is
0-450℃；
Step 4: placing: COB substrate being installed to the COB fixed structure of the base fixture, and the steel mesh is covered
It covers and is covered on COB substrate in COB substrate, then the fluorescent glue feeding that step 2 stirring deaeration is completed is to the fluorescent glue feeding
Position；
Step 5: printing: with the mobile brush coating cutter of the speed of 50mm/s, and keeping brush coating cutter direction of advance and institute
The included angle of steel mesh is stated at 55 °, the fluorescent glue on the fluorescent glue at material position is printed by the through-hole on the steel mesh
To the light emitting region of COB substrate；
Step 6: solidify: the COB substrate that gluing is finished takes out, and is put into LED light electric oven, set baking temperature as
After 100 °, baking 1 hour, resetting baking temperature is 150 °, is toasted 3 hours, and last set baking temperature is 170 °, baking 3
Hour is to carry out curing process to COB substrate.
The beneficial effects of the present invention are: the invention proposes a kind of brush coating devices for COB LED encapsulation, pass through bottom
The fixed COB substrate to gluing of seat jig, then steel mesh is covered on COB substrate, using brush coating cutter by deployed fluorescence
Glue is printed on COB substrate on corresponding light emitting region by the through-hole on steel mesh, and not only glue amount control is more accurate, and yields is more
Height, and entire brush coating process one-pass molding, process is simple, improves production efficiency, and can one-step print multiple COB substrates,
It can be realized mass production；In addition, the fluorescent glue high using viscosity, is not easy to precipitate, the consistency of production front and back ensure that.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of steel mesh of the present invention；
Fig. 2 is the structural schematic diagram of base fixture of the present invention.
Specific embodiment
The technical solution protected below in conjunction with attached drawing to the present invention illustrates.
Please refer to Fig. 1 and Fig. 2.The invention proposes a kind of brush coating devices for COB LED encapsulation, eliminate existing point
Box dam used in adhesive process simplifies the process of coating fluorescent glue accordingly, avoids cavity caused by encapsulating and glue thickness not
The problems such as consistent, improves yields, improves production efficiency.
Brush coating device of the invention includes the base fixture 9 for fixing COB substrate, and the COB substrate setting to brush coating exists
On the base fixture 9, steel mesh 5 is then covered on COB substrate, several through-holes 6 is opened up on the steel mesh 5, and described logical
Hole 6 is corresponding with the light emitting region on COB substrate, and the through-hole 6 can be circle, square etc. arbitrarily and on COB substrate
The identical shape in light emitting region；The side of the steel mesh 5 is provided with material position 8 on fluorescent glue, fluorescent glue to be printed is placed
On the fluorescent glue at material position 8, the outside of material position 8 on the fluorescent glue, and meanwhile it is useful in the setting of the top of the steel mesh 5
In the frictioning cutter 7 of frictioning, the frictioning cutter 7 can move back and forth on the steel mesh 5, thus described in fluorescent glue is penetrated
Through-hole 6 is coated on the light emitting region of COB substrate, entire printing process one-pass molding, without first box dam, simplifies processing stream
Journey, and glue amount control is more accurate, falls BIN and more concentrates, improves yields.
The viscosity of fluorescent glue to be coated is limited in 1000~14000mPa.s/25 DEG C in one of the embodiments, keeps away
It is free sticky to spend low bring mobility by force without easily molded problem, and viscosity is excessively high, is not easy to coat.
The base fixture 9 includes jig body in one of the embodiments, offers COB in the jig body
Fixing groove 90 is also provided with finger groove 11 in the jig body, and the finger groove 11 is located at the both ends of the COB fixing groove,
COB substrate is placed in the COB fixing groove 90, the connection of the finger groove 11 and the COB fixing groove facilitates pick-and-place
COB substrate.In other embodiments, the bottom of the COB fixing groove 90 is provided with several negative pressure suckers 10, takes by steel mesh 5
When rising, for further fixing COB substrate, it is prevented to be brought away from.
The steel mesh 5 includes steel mesh ontology in one of the embodiments, is coated with organic painting on the steel mesh ontology
Layer, the material of the steel mesh ontology are metallic steel, and the organic coating uses plasma thermal sprayed technology, more using nickel-base alloy
Dissipating bind closes macromolecule adhesive, and uses bionics lotus leaf effect " so that the organic coating coating has extremely low gluing
Peeling force and excellent wearability, the hardness of organic coating are HV800, and roughness is Ra3.2~6.4, and the model of resistance to temperature
Enclose: within 0-450 DEG C, in one of the embodiments, the organic coating with a thickness of 0.15~0.3MM, for avoiding glue
Water adhesion residual, preferably guarantees the consistency of each product glue amount；Further, the inner wall of the through-hole 6 is also coated with
State organic coating.
The spreading knife in one of the embodiments, 7 include cutter body 71 and scraper 70, and the scraper 70 is arranged
Below the cutter body 71, the cutter body 71 drives the scraper 70 to move back and forth, and the scraper 70 advances with it
The included angle in direction is 55 °, if the angle is too small, fluorescent glue can be pushed away too early, cause scraper and steel mesh contact point starved；
And the angle is excessive, fluorescent glue cannot by the lower pressure of scraper, only rely on gravity will lead to molding it is not full；Since scraper is transported
Scanning frequency degree also will affect the filling effect of fluorescent glue, set in one of the embodiments, the movement speed of the scraper as
50mm/s, to guarantee the quality of printing.
More specifically, the surface of the scraper 70 is coated with organic coating, and the material of the scraper is metallic steel.
In one of the embodiments, in order to guarantee the quality of printing, table on the lower end of the scraper 70 and the steel mesh 5
Specific between face is in 0.08mm between 0.12mm, it is preferred that distance between the two is in 0.1mm.
Printing once can be completed to a COB substrate in one of the embodiments, it in other embodiments, can also
With by muti-piece COB substrate according to certain sequential arrangement after, while muti-piece COB substrate is printed, i.e., by multiple pedestals
Jig 9 is arranged successively according to end to end, multiple base fixtures 9 can also be arranged according to array manner, such as 2*2 matrix
The four connecting plate modes constituted, in other embodiments, multiple base fixtures 9 can also be integrally molded so as an entirety, entire bottom
Several COB fixing grooves 90 are successively offered on seat jig 9；Correspondingly, the steel mesh 5 and the frictioning cutter 7 or one
It is a or multiple.
The method that brush coating is carried out using brush coating device of the invention, the specific steps are as follows:
Step 1: allotment fluorescent glue, so that the viscosity of the fluorescent glue is at 10000~14000mPa.s/25 DEG C；
Step 2: stirring deaeration: deployed fluorescent glue being put into vacuum defoamation blender, vacuum defoamation blender turns
Fast subsection setup are as follows: 300r/min 30s, 600r/min 30S, 900r/min 20S, 1200r/min 10S, and vacuum is set
Degree is -90kpa；
Step 3: plasma thermal sprayed technology is used, organic coating is coated on the steel mesh and brush coating cutter,
In, organic coating with a thickness of 0.15~0.3mm, and hardness is HV800, and roughness is Ra3.2~6.4, and resistance to temperature range is
0-450℃；
Step 4: placing: COB substrate being installed to the COB fixed structure of the base fixture, and the steel mesh is covered
It covers and is covered on COB substrate in COB substrate, then the fluorescent glue feeding that step 2 stirring deaeration is completed is to the fluorescent glue feeding
Position；
Step 5: printing: with the mobile brush coating cutter of the speed of 50mm/s, and keeping brush coating cutter direction of advance and institute
The included angle of steel mesh is stated at 55 °, the fluorescent glue on the fluorescent glue at material position is printed by the through-hole on the steel mesh
To the light emitting region of COB substrate；
Step 6: solidify: the COB substrate that gluing is finished takes out, and is put into LED light electric oven, set baking temperature as
After 100 °, baking 1 hour, resetting baking temperature is 150 °, is toasted 3 hours, and last set baking temperature is 170 °, baking 3
Hour is to carry out curing process to COB substrate.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of brush coating device for COB LED encapsulation, which is characterized in that single including multiple brush coating units interconnected
A brush coating unit includes steel mesh, frictioning cutter and base fixture, is provided with COB fixed structure on the base fixture；
The steel mesh is covered on above COB substrate, several through-holes is offered on the steel mesh, the through-hole and the light emitting region COB are one by one
It is corresponding；Material position on fluorescent glue is provided at the upper side of the steel mesh；The frictioning cutter is arranged above the steel mesh, and in institute
It states and is moved back and forth above steel mesh.
2. a kind of brush coating device for COB LED encapsulation according to claim 1, which is characterized in that the pedestal is controlled
Tool includes jig body, and the COB fixed structure includes COB fixing groove, and the COB fixing groove is provided with the jig body
On, COB fixing groove bottom is provided with several negative pressure suckers.
3. a kind of brush coating device for COB LED encapsulation according to claim 2, which is characterized in that the COB is fixed
The both ends of slot offer finger groove, and the finger groove is connected to the edges at two ends of the COB fixing groove.
4. a kind of brush coating device for COB LED encapsulation according to claim 1, which is characterized in that the steel mesh packet
Include steel mesh ontology, be coated with organic coating above the steel mesh ontology, the thickness of the organic coating 0.15mm to 0.3mm it
Between, the hardness of organic coating is HV800, and roughness is Ra3.2~6.4；The through-hole runs through the organic coating and institute
State steel mesh ontology.
5. a kind of brush coating device for COB LED encapsulation according to claim 4, which is characterized in that in the through-hole
Wall is coated with the organic coating；The material of the steel mesh ontology is metallic steel.
6. a kind of brush coating device for COB LED encapsulation according to claim 1, which is characterized in that the spreading knife
Tool includes cutter body and scraper, and the scraper is inclined at below the cutter body, the scraper and its side of advance
To included angle be 55 °.
7. a kind of brush coating device for COB LED encapsulation according to claim 6, which is characterized in that the scraper table
Face is coated with organic coating, and the material of the scraper is metallic steel.
8. a kind of brush coating device for COB LED encapsulation according to claim 6, which is characterized in that under the scraper
The distance between end and the steel mesh are in 0.08mm between 0.12mm.
9. a kind of brush coating device for COB LED encapsulation according to any one of claims 1 to 8, which is characterized in that multiple
The brush coating unit is arranged with array manner or multiple base fixtures are integrally formed.
10. using a kind of brush coating method of the brush coating device for COB LED encapsulation as described in any one of claim 1 to 9,
It is characterized in that, includes the following steps:
Step 1: allotment fluorescent glue, so that the viscosity of the fluorescent glue is at 10000~14000mPa.s/25 DEG C；
Step 2: deployed fluorescent glue stirring deaeration: being put into vacuum defoamation blender, the revolving speed point of vacuum defoamation blender
Section setting are as follows: 300r/min 30s, 600r/min 30S, 900r/min 20S, 1200r/min 10S, and be arranged vacuum degree be-
90kpa；
Step 3: using plasma thermal sprayed technology, organic coating is coated on the steel mesh and brush coating cutter, wherein have
Organic coating with a thickness of 0.15~0.3mm, and hardness is HV800, and roughness is Ra3.2~6.4, and resistance to temperature range is 0-450
℃；
Step 4: placing: COB substrate being installed to the COB fixed structure of the base fixture, and the steel mesh is covered on
COB substrate is covered on COB substrate, then material position on the fluorescent glue feeding to the fluorescent glue that step 2 stirring deaeration is completed；
Step 5: printing: with the mobile brush coating cutter of the speed of 50mm/s, and keeping brush coating cutter direction of advance and the steel
The included angle of net is printed by the through-hole on the steel mesh to COB at 55 °, by the fluorescent glue on the fluorescent glue at material position
On the light emitting region of substrate；
Step 6: solidify: the COB substrate that gluing is finished takes out, and is put into LED light electric oven, sets baking temperature as 100 °, dries
After 1 hour roasting, resetting baking temperature is 150 °, is toasted 3 hours, and last set baking temperature is 170 °, toasts 3 hours with right
COB substrate carries out curing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910273278.9A CN110010747A (en) | 2019-04-04 | 2019-04-04 | A kind of brush coating device and brush coating method for COB LED encapsulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910273278.9A CN110010747A (en) | 2019-04-04 | 2019-04-04 | A kind of brush coating device and brush coating method for COB LED encapsulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110010747A true CN110010747A (en) | 2019-07-12 |
Family
ID=67170100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910273278.9A Pending CN110010747A (en) | 2019-04-04 | 2019-04-04 | A kind of brush coating device and brush coating method for COB LED encapsulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110010747A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114216103A (en) * | 2021-12-16 | 2022-03-22 | 重庆翰博显示科技研发中心有限公司 | Rapid glue sealing method for miniature light-emitting diode lamp panel |
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