CN103441208A - Method for coating quickly-solidified white LED fluorescent glue - Google Patents
Method for coating quickly-solidified white LED fluorescent glue Download PDFInfo
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- CN103441208A CN103441208A CN2013103939093A CN201310393909A CN103441208A CN 103441208 A CN103441208 A CN 103441208A CN 2013103939093 A CN2013103939093 A CN 2013103939093A CN 201310393909 A CN201310393909 A CN 201310393909A CN 103441208 A CN103441208 A CN 103441208A
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Abstract
The invention discloses a method for coating quickly-solidified white LED fluorescent glue. The method comprises the steps of preparing the fluorescent glue, and conducting deaeration treatment on the evenly-stirred fluorescent glue; pointing the fluorescent glue and evenly spraying the fluorescent glue going through the deaeration treatment to a support; quickly solidifying the fluorescent glue after pointing the fluorescent glue, wherein the quick solidifying step concretely comprises the step of placing a heating block above the support where the fluorescent glue is pointed to heat from top to bottom, heating temperature is 100-180 DEG C, and heating time is 1-5 minutes. By the adoption of the technical scheme, the ceramic heating block is used for solidifying from top to bottom, silica gel is solidified first, then, heat is conducted to air in insulation layer adhesion agent white oil, the air can not form bubbles, and the bubble defective ratio is less then 10%, so that the bubble defective ratio is greatly reduced; the distance between the ceramic heating block and the fluorescent glue on the support is very short, so that the fluorescent glue can be quickly solidified in the 1-5 minutes, and the salification time in the prior art is greatly reduced.
Description
Technical field
The present invention relates to white-light LED fluorescence glue coating processes, be specifically related to quick-setting white-light LED fluorescence glue painting method.
Background technology
The production technology of conventional white light LED is mainly to use blue chip to add yellow fluorescent glue to synthesize at the baking oven internal heating curing, and general detailed process as shown in Figure 1, is at first put fluorescent glue; Then test in the middle of carrying out for the first time, and defective item is mended to glue repeatedly to reach the qualified product specification; Then qualified product are carried out to first sintering (sintering is a fluorescent glue solidification process, and a lot of places also are called curing outside), then carry out middle test for the second time, defective item is wherein mended to glue, middle survey, sintering more repeatedly until qualified.(mended glue; Then carry out sintering for the second time, carry out afterwards middle test for the third time, after test, defective item is wherein mended to glue), qualified product are wherein encapsulated.In production process to the quantity of fluorescent glue, distribute that it is harsh to require, usually have following factor in this process:
1. batch production, the time of staying after some glue is inconsistent, fluorescent glue sedimentation degree difference;
2. the baking oven heat conduction velocity is slow, and product heats up slow, and the temperature-rise period fluorescent glue flows chaotic.
Above-mentioned two factor actings in conjunction cause the colour temperature of final products, chromaticity coordinates that larger difference is arranged, and need in the benefit glue of too much wheel, survey sintering, have greatly elongated the production cycle, even like this, batch qualification rate generally also only has 85% simultaneously.Can't meet customer requirement, cause relatively large chromaticity coordinates, colour temperature bad.
In addition, white light LEDs, due to batch difference of fluorescent material, chip, all must first try stream before each batch.Time of staying when there is each examination stream in this production decision and the time of staying of batch production are inconsistent, cause examination to flow through journey numerous and diverse.The examination stream cycle is long, has also increased the production time of product.
Based on the problems referred to above, one piece of application number is 201110175201.1, within open day, is the patent of invention of 2011.10.19, disclose a kind of white light LEDs plane coating method of fluorescent glue in package, its step according to configuration fluorescent glue, expansion crystalline substance, installation mold, painting fluorescent glue, curing fluorescent glue and taking-up mould realizes.Although this patent can effectively guarantee that the fluorescent glue coating layer thickness is even, and strengthened uniformity and the consistency with batch LED fluorescent glue coated shape, the semi-finished product fluorescent material of its initial stage point glue very easily precipitates, and causes the photochromic consistency of finished product poor.
For example application number is 201210572758.3, within open day, is the patent of invention of 2013-04-17 again, and disclose a kind of white light LEDs fluorescent powder coating technique, at first it fix chip and electric wire on support; The glue that will be mixed with fluorescent material with high-accuracy machine evenly is sprayed on the support of heating; Then rapid curing; Then the product sprayed is carried out to lens packages; Finally by being cut into single LEDs after encapsulation or being directly the LED that the COB modal sets forms.Again for example, one piece of application number is 201210532812.1, within open day, is the patent of invention of 2013-03-20, a kind of LED fluorescent glue curing is disclosed, it comprises the steps: 1. to prepare fluorescent glue, fluorescent material and the glue of encapsulation use are disposed in container in accordance with the appropriate ratio, and stir; 2. deaeration is processed, and the fluorescent glue stirred is proceeded to vacuumize in instrument and carry out deaeration; 3. put fluorescent glue, the fluorescent glue after deaeration is proceeded in syringe, according to the different size of product, carry out a glue setting parameter, realize automatically dropping glue; 4. the glue amount is regulated, and the LED product after a glue is repaiied to glue with the monitoring colour temperature; 5. advance roastingly, put baking in baking box into; Wherein, described step 4. and step 5. between, also comprise fluorescent glue primary solidification step.In the method, before the LED product is put in baking box baking into, increase fluorescent glue primary solidification step, make the semi-finished product after invocation point glue all can complete primary solidification in the very first time, effectively suppressed the precipitation of fluorescent material, guaranteed the photochromic consistency of finished product.In above-mentioned two patents, although improved to a certain extent the white light LEDs all directions glow color uniformity, but it all adopts heating station, rapid curing is carried out in heating, if support (or address is substrate) is aluminium base, because the bowl cup is that insulating barrier+adhesive glue+white oil forms, when heating station solidifies, the air of these layer of centre enters expanded by heating in silica gel, form a lot of cellular bubbles, (naked eyes are visible for bubble, more than diameter is greater than 0.2mm) fraction defective is up to 100%, to the user, brings very large puzzlement.
Summary of the invention
Therefore, for above-mentioned problem, the present invention proposes a kind of quick-setting white-light LED fluorescence glue painting method, and this curing has improved white light LEDs product chromaticity coordinates, colour temperature qualification rate; For after the heating of the supports such as aluminium base, producing the problem of bubble, existing curing schedule is improved in addition, greatly reduced the fraction defective of bubble, shortened life cycle of the product, thereby solved the deficiency of prior art.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is that a kind of quick-setting white-light LED fluorescence glue painting method comprises the following steps:
Step 1: prepare fluorescent glue, its rear deaeration that stirs is processed;
Step 2: the some fluorescent glue evenly is sprayed on support by the fluorescent glue after deaeration;
Step 3: after having put fluorescent glue, carry out immediately rapid curing, concrete, its rapid curing comprises following process: heat block (thermal source) is positioned over to the support top of having put fluorescent glue and heats from top to bottom, its heating-up temperature is 100 ℃-180 ℃, time 1-5min, and the fluorescent glue distance on heat block and support is very near, preferably, the spacing of heat block and fluorescent glue is 1-10mm.Wherein, heating-up temperature is preferably 150 ℃.
Further, the preferred Ceramics heat block of described heat block.This ceramic heat piece is preferably the ceramic heat piece of constant temperature, and certainly, the ceramic heat piece of non-constant temperature is also passable, only need to make its temperature between 100-180, and temperature fluctuates a little, and along with the rising of room temperature, does not heat up, little on the impact of final result.In addition, adopt other materials (for example steel heat block, aluminium alloy heat block all can) also can realize purpose of the present invention, can so long as this heat block energy satisfied temperature is roughly stable.
The present invention adopts such scheme, compared with prior art, has following advantage:
Quick-setting scheme is carried out in 1 employing heating station heating of the prior art, general support is aluminium base, because the bowl cup on support is insulating barrier+adhesive glue+white oil, when heating station solidifies, the air of these layer of centre will show expanded by heating and enter in silica gel, form a lot of cellular bubbles, the bubble fraction defective is up to 100%, the solution of the present invention is to adopt the ceramic heat piece to solidify from top to bottom, silica gel first solidifies, then heat just is transmitted to the air between insulating barrier adhesive glue white oil, air can't form bubble, the fraction defective of bubble is lower than 10%, the bubble fraction defective obviously reduces greatly,
Fluorescent glue distance on 2 ceramic heat pieces and support is very near, and its heating time, 1-5min can realize the rapid curing of fluorescent glue, had greatly shortened curing time of the prior art.
The present invention has increased fast-curing process newly, utilizes rapid curing, and fluorescent glue is rested on to more consistent that time after a glue, the impact that avoided follow-up and solidify, encapsulation distributes on fluorescent glue.The present invention is by said process, and the colour temperature, the chromaticity coordinates difference that have solved the final products that white light LEDs product fluorescent glue sinking speed difference causes are large, improves chromaticity coordinates, the colour temperature consistency of white light LEDs product; And the production cycle of shortening LED product.
The accompanying drawing explanation
The schematic flow sheet that Fig. 1 is white-light LED fluorescence glue painting method in prior art;
The schematic flow sheet that Fig. 2 is quick-setting white-light LED fluorescence glue painting method of the present invention.
Embodiment
Now with embodiment, the present invention is further described by reference to the accompanying drawings.
Thinking of the present invention is, on former technological process (as Fig. 1) basis, newly-increased fast-curing process (as Fig. 2), test in the middle of removing for the second time, mend glue, for the third time in the middle of test, the process such as sintering for the second time, putting fluorescent glue, after testing in the middle of carrying out for the first time, immediately qualified product are wherein used to (150 ℃ of heat blocks, 1-5min) carry out rapid curing, utilize quick-setting method, fluorescent glue is rested on to more consistent that time after a glue, farthest reduce fluorescent glue because stopping, solidify the difference in the distribution caused.Avoided follow-up and solidified, encapsulation is on the impact of fluorescent glue changes in distribution.Make batch production process and examination flow through journey consistent simultaneously, reduced the error of examination stream.
The present invention is applicable to the fluorescent glue point glue process that packing forms is the white light LEDs products such as Top, COB, imitative lumen.
Concrete, a kind of quick-setting white-light LED fluorescence glue painting method of the present invention comprises the following steps:
Step 1: prepare fluorescent glue, its rear deaeration that stirs is processed; This fluorescent glue is that fluorescent material and glue are formulated in specific proportions; Deaeration is generally to carry out deaeration in the vacuum defoamation machine;
Step 2: the some fluorescent glue evenly is sprayed on support by the fluorescent glue after deaeration by high-accuracy instrument; High-accuracy instrument for example uses automatic dispensing machine;
Step 3: after having put fluorescent glue, carry out immediately rapid curing, concrete, its rapid curing comprises following process: heat block (thermal source) is positioned over to the support top of having put fluorescent glue and heats from top to bottom, its heating-up temperature is 150 ℃, time 1-5min, and the surface distance of the fluorescent glue on heat block and support is very near, preferably, the spacing of heat block and fluorescent glue is 1-10mm.Wherein, preferred, the ceramic heat piece that described heat block is constant temperature.
The present invention uses heat block to carry out rapid curing, utilizes this quick-setting method, and fluorescent glue is rested on to more consistent that time after a glue, farthest reduces fluorescent glue because stopping, solidify the difference in the distribution caused.In addition, adopt the solution of the present invention, it solidifies from top to bottom, and silica gel first solidifies, and then heat just is transmitted to the air between insulating barrier adhesive glue white oil, and air can't form bubble, and the fraction defective of bubble is lower than 10%.Actual count is produced 300pcs, and bubble is bad only has 3, fraction defective 1%.
Although specifically show and introduced the present invention in conjunction with preferred embodiment; but the those skilled in the art should be understood that; within not breaking away from the spirit and scope of the present invention that appended claims limits; can make a variety of changes the present invention in the form and details, be protection scope of the present invention.
Claims (4)
1. a quick-setting white-light LED fluorescence glue painting method is characterized in that: comprise the following steps:
Step 1: prepare fluorescent glue, its rear deaeration that stirs is processed;
Step 2: the some fluorescent glue evenly is sprayed on support by the fluorescent glue after deaeration;
Step 3: after having put fluorescent glue, carry out immediately rapid curing, concrete, its rapid curing comprises following process: heat block is positioned over to the support top of having put fluorescent glue and heats from top to bottom, its heating-up temperature is 100 ℃-180 ℃, time 1-5min.
2. white-light LED fluorescence glue painting method according to claim 1, it is characterized in that: the spacing of the fluorescent glue on heat block and support is 1-10mm.
3. white-light LED fluorescence glue painting method according to claim 1, is characterized in that: the ceramic heat piece that described heat block is constant temperature.
4. white-light LED fluorescence glue painting method according to claim 1, it is characterized in that: described heating-up temperature is 150 ℃.
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| CN201310393909.3A CN103441208B (en) | 2013-09-02 | 2013-09-02 | Quick-setting white-light LED fluorescence glue painting method |
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| CN201310393909.3A CN103441208B (en) | 2013-09-02 | 2013-09-02 | Quick-setting white-light LED fluorescence glue painting method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106449685A (en) * | 2016-10-24 | 2017-02-22 | 江苏钜芯集成电路技术股份有限公司 | Glue spraying technology for photosensitive chip packaging |
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| US20110180834A1 (en) * | 2004-03-31 | 2011-07-28 | Peter Andrews | Packaged Light Emitting Devices |
| JP2011171357A (en) * | 2010-02-16 | 2011-09-01 | Stanley Electric Co Ltd | Light emitting device and method of manufacturing the same |
| CN102237475A (en) * | 2010-05-04 | 2011-11-09 | 李长会 | LED wafer level fluorescent powder coating technology based on organic colloid |
| CN102437255A (en) * | 2011-11-25 | 2012-05-02 | 上海祥羚光电科技发展有限公司 | Fluorescent chip for white light LED (light-emitting diode) prepared by spinning coating process |
| CN102983253A (en) * | 2012-12-12 | 2013-03-20 | 南京汉德森科技股份有限公司 | Curing method for LED fluorescent glue |
| CN103050612A (en) * | 2012-12-25 | 2013-04-17 | 生迪光电科技股份有限公司 | Coating process of white LED (Light Emitting Diode) fluorescent powder |
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2013
- 2013-09-02 CN CN201310393909.3A patent/CN103441208B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110180834A1 (en) * | 2004-03-31 | 2011-07-28 | Peter Andrews | Packaged Light Emitting Devices |
| JP2011171357A (en) * | 2010-02-16 | 2011-09-01 | Stanley Electric Co Ltd | Light emitting device and method of manufacturing the same |
| CN102237475A (en) * | 2010-05-04 | 2011-11-09 | 李长会 | LED wafer level fluorescent powder coating technology based on organic colloid |
| CN102437255A (en) * | 2011-11-25 | 2012-05-02 | 上海祥羚光电科技发展有限公司 | Fluorescent chip for white light LED (light-emitting diode) prepared by spinning coating process |
| CN102983253A (en) * | 2012-12-12 | 2013-03-20 | 南京汉德森科技股份有限公司 | Curing method for LED fluorescent glue |
| CN103050612A (en) * | 2012-12-25 | 2013-04-17 | 生迪光电科技股份有限公司 | Coating process of white LED (Light Emitting Diode) fluorescent powder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106449685A (en) * | 2016-10-24 | 2017-02-22 | 江苏钜芯集成电路技术股份有限公司 | Glue spraying technology for photosensitive chip packaging |
| CN106449685B (en) * | 2016-10-24 | 2018-09-21 | 江苏钜芯集成电路技术股份有限公司 | Spray-bonding craft for sensitive chip encapsulation |
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| CN103441208B (en) | 2015-10-14 |
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Address after: 361000 Fujian Province, Xiamen torch hi tech Industrial Development Zone Hualian electronic building Patentee after: Xiamen Hualian electronic Limited by Share Ltd Address before: 361000 Fujian Province, Xiamen torch hi tech Industrial Development Zone Hualian electronic building Patentee before: Xiamen Hualian Electronics Co., Ltd. |