CN106520119A - Fluorescent powder capable of emitting cyan light and preparation method thereof - Google Patents
Fluorescent powder capable of emitting cyan light and preparation method thereof Download PDFInfo
- Publication number
- CN106520119A CN106520119A CN201610933462.8A CN201610933462A CN106520119A CN 106520119 A CN106520119 A CN 106520119A CN 201610933462 A CN201610933462 A CN 201610933462A CN 106520119 A CN106520119 A CN 106520119A
- Authority
- CN
- China
- Prior art keywords
- fluorescent material
- send
- cyan light
- use according
- light
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7774—Aluminates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7767—Chalcogenides
- C09K11/7768—Chalcogenides with alkaline earth metals
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
Abstract
The invention relates to an LED fluorescent powder capable of emitting cyan light and a preparation method thereof. The prepared fluorescent powder is garnet based, and has a general formula of Ca2A1-xB2C3O12:xCe, wherein A is one or more of Lu, Y, La or Gd; B is one or two of Hf or Zr; C is one or two of Al or Ga, and x is greater than or equal to 0.01 and smaller than or equal to 0.06. The fluorescent powder prepared by the method provided by the invention has the advantages of good crystallinity, high luminous efficiency, high brightness, stable chemical properties, small brightness variation at high temperature and long service life. The preparation method is simple and practicable, and has wide process window, thus being suitable for large-scale industrial production.
Description
Technical field
The present invention relates to a kind of LED uses phosphor technologies field, particularly a kind of fluorescent material for sending cyan light is extremely
Preparation method.
Background technology
White light LEDs are a kind of New Solid light sources, now have been used for the principal light source of outdoor lighting.Current white light LEDs
The main commercialization practice is the painting last layer YAG fluorescent powder on InGaN blue chips, excites this fluorescent material using blue chip
The gold-tinted complementary with blue light is produced, mixing draws white light.But the glow color of device is with driving voltage and fluorescent coating thickness
Change and change, color reducibility is poor, and color rendering index is low.Therefore with black light (380～410nm) chip LED technology
Maturation, excite the design of the white light LEDs of redgreenblue fluorescent material will be more noticeable with black light chip.Due to regarding
Feel insensitive to ultraviolet light, than the white light LEDs colour stable that blue chip is excited, color is also for the white light LEDs of black light chip
Originality and color rendering index are high, meanwhile, used as the important component part of full color spectrum, green light can effectively improve white light LEDs
Color rendering index, so as to obtain the white light of more high-quality.Therefore the green light fluorescent material of research and development near ultraviolet excitation has important meaning
Justice.At present, the main application that can send the fluorescent material of cyan light (wave-length coverage is 480～490nm) concentrates on FED fields, public
The number of opening discloses the pastiness color of serial FED, green, yellow and white for the application for a patent for invention of CN101914377A
The luminescent material of coloured light, its chemical composition expression is：Li2M1-xEuxSO4And Li2-yM1-xEuxCeySO4.Wherein, M is alkaline earth gold
Category ion, selected from Ca2+、Ba2+、Sr2+；Eu2+(bivalent rare earth europium ion) and Ce3+(trivalent rare earth cerium ion) is active ions；
X, y are active ions Eu2+And Ce3+With respect to the molar percentage coefficient that alkaline-earth metal ions M is accounted for, span：0.001≤x≤
0.01,0.001≤y≤0.01.Novel rare-earth luminescent material prepared by the invention, can be respectively in the case where denoted low voltage electron beam is excited
Send stronger cyan, green and sodium yellow and Eu2+And Ce3+The white light of transmitting composition, is introduced into FED glimmering with three primary colours
Light powder can be significantly expanded the indication range of fluorescent material.The application for a patent for invention of Publication No. CN102899039A discloses one kind of knowing clearly
Cyan luminescent material and preparation method thereof, its chemical composition expression is：(4-x)SrO·4SiO2·4SrCl2XEuO, its
In, Eu2+(divalent europium) is active ions；X replaces the mole of Sr, span for Eu：0.01≤x≤0.50.This is special
The preparation method of profit is simple, it is adaptable to 3D flat faced displays.In prior art, green light fluorescent material is also only located in the application of LED field
In the starting stage, the green light fluorescent material of near ultraviolet excitated efficient stable is still very rare, and related technology contents rarely have disclosure.
Additionally, how to obtain the scheme that the green light fluorescent material with good brightness and colour stability there is no solution at high temperature, belong to
In the problem to be solved of this area one.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, a kind of can obtaining at high temperature with good bright is proposed
The green light fluorescent material of degree and colour stability, and the preparation method of this fluorescent material.
A kind of LED use of the present invention can send the fluorescent material of cyan light, it is characterised in that the formula of the fluorescent material is
Ca2A1-xB2C3O12:xCe；Wherein A is one or more in Lu, Y, La or Gd；B be Hf or Zr in one or two；C is
One or two in Al or Ga；Activator is Ce ions；Wherein, 0.01≤x≤0.06.Garnet structure good stability, be
A kind of excellent luminous host, thus obtained this light-emitting phosphor intensity are high, and strength retrogression is slow at high temperature, has
Good brightness and colour stability, function admirable.
Further, the chemical composition of the fluorescent material that LED use of the invention can send cyan light is
Ca2Lu0.97Ce0.03Hf2Al3O12。
Further, the chemical composition of the fluorescent material that LED use of the invention can send cyan light is
Ca2Lu0.5Y0.49Ce0.01HfZrAl3O12。
Further, the chemical composition of the fluorescent material that LED use of the invention can send cyan light is
Ca2Lu0.5Y0.44Ce0.06Hf2Ga3O12。
Further, the chemical composition of the fluorescent material that LED use of the invention can send cyan light is
Ca2La0.97Ce0.03HfZrAl3O12。
Further, the chemical composition of the fluorescent material that LED use of the invention can send cyan light is
Ca2Gd0.97Ce0.03Hf2Al3O12。
Further, LED use of the invention can send the preparation method of the fluorescent material of cyan light, comprise the steps：
1) according to chemical general formula Ca2A1-xB2C3O12:xCe weighs raw material, and wherein Ca passes through its carbonate or oxide is introduced,
A, B and C are introduced by its oxide, and Ce is also introduced in the form of its oxide；
2) raw material for weighing is sufficiently mixed into grinding and obtains mixed material powder；
3) obtained material powder is loaded in corundum crucible, be placed in reducing atmosphere, 4 be incubated at 1400～1500 DEG C
～8h, cools to room temperature with the furnace；
4) product of sintering is taken out grinding, is sieved, obtain the fluorescent material of the sent cyan light for LED of the present invention
Ca2A1-xB2C3O12:xCe。
Further, LED use of the invention can send the preparation method of the fluorescent material of cyan light, the reduction in its reducing atmosphere
Property gas be H2, volume content is 5%～10%.
Compared with prior art, the present invention has following beneficial technique effect：
It is a kind of fluorescent material of garnet-base that the LED use that the present invention is provided can send the fluorescent material of cyan light, using common
Metal carbonate or oxide be prepared by raw material, prepared garnet-base hanced cyan fluorescent powder degree of crystallinity preferably, lights
Efficiency high, brightness are stronger, stable chemical nature, and under high temperature, brightness flop is little, life-span length.The method is simple, process window
Width, is adapted to large-scale industrial production.
Description of the drawings
X-ray diffraction spectrograms of the Fig. 1 for embodiment 1.
Fig. 2 is excited and launching light spectrogram for embodiment 1.
Emission spectrum variation with temperature figures of the Fig. 3 for embodiment 1, wherein excitation wavelength are 410nm.
Specific embodiment
With reference to specific embodiment, the present invention is described in further detail.
In embodiment 1 according to Ca2Lu0.97Ce0.03Hf2Al3O12Stoichiometric proportion weighs CaCO3、Lu2O3、HfO2、Al2O3
And CeO2, it is blended, be fully ground after be put in alumina crucible；Crucible is placed in tube furnace, in protective gas N2/H2=
9:In 1 (volume ratio), sintered 2 hours with 900 DEG C of temperature, then proceed to be warming up to after 1500 DEG C of temperature are sintered 5 hours and be cooled to
Room temperature；Take out after attrition grinding is sieved and obtain fluorescent material Ca2Lu0.97Ce0.03Hf2Al3O12。
Fig. 1 is Ca2Lu0.97Ce0.03Hf2Al3O12X-ray diffraction spectrogram, as seen from the figure the sample have good
Crystal structure.Fig. 2 is Ca2Lu0.97Ce0.03Hf2Al3O12Excite and launching light spectrogram, the excitation wavelength of the fluorescent material between
300～450nm, preferable excitation wavelength is at 340 ± 10nm and 410 ± 10nm；Launching light dominant wavelength is located at 484nm.Fig. 3 is
Ca2Lu0.97Ce0.03Hf2Al3O12Emission spectrum variation with temperature figure, wherein excitation wavelength be 410nm, it can be found that this is glimmering
There is under light powder high temperature good brightness and colour stability.Because garnet structure good stability, it is a kind of excellent lighting
Substrate, therefore luminous intensity of the garnet-base fluorescent material at 150 DEG C for preparing when being room temperature 87%, and be it is commercial (Sr,
Ba)2SiO4:Eu2+1.1 times of light-emitting phosphor intensity.
In example 2 according to Ca2Lu0.5Y0.49Ce0.01HfZrAl3O12Stoichiometric proportion weighs CaCO3、Lu2O3、Y2O3、
HfO2、ZrO2、Al2O3And CeO2, it is blended, be fully ground after be put in alumina crucible；Crucible is placed in tube furnace, is being protected
Shield gas N2/H2=46:In 4 (volume ratios), sintered 2 hours with 900 DEG C of temperature, then proceed to be warming up to 1450 DEG C of temperature sintering 6
Room temperature is cooled to after hour；Take out after attrition grinding is sieved and obtain hanced cyan fluorescent powder Ca2Lu0.5Y0.49Ce0.01HfZrAl3O12。
According to Ca in embodiment 32Lu0.5Y0.44Ce0.06Hf2Ga3O12Stoichiometric proportion weighs CaCO3、Lu2O3、Y2O3、
HfO2、Ga2O3And CeO2, it is blended, be fully ground after be put in alumina crucible；Crucible is placed in tube furnace, in shielding gas
Body N2/H2=46:In 4 (volume ratios), sintered 2 hours with 900 DEG C of temperature, then proceed to be warming up to 1425 DEG C of temperature sintering 6 hours
After be cooled to room temperature；Take out after attrition grinding is sieved and obtain fluorescent material Ca2Lu0.5Y0.44Ce0.06Hf2Ga3O12。
According to Ca in embodiment 42La0.97Ce0.03HfZrAl3O12Stoichiometric proportion weighs CaCO3、La2O3、HfO2、ZrO2、
Al2O3And CeO2, it is blended, be fully ground after be put in alumina crucible；Crucible is placed in tube furnace, in protective gas N2/
H2=46:In 4 (volume ratios), sintered 2 hours with 900 DEG C of temperature, then proceed to be warming up to cold after 1450 DEG C of temperature are sintered 6 hours
But to room temperature；Take out after attrition grinding is sieved and obtain fluorescent material Ca2La2HfZrAl3O12。
Embodiment 5, according to Ca2Gd0.97Ce0.03Hf2Al3O12Stoichiometric proportion weighs CaCO3、Gd2O3、HfO2、Al2O3And
CeO2, it is blended, be fully ground after be put in alumina crucible；Crucible is placed in tube furnace, in protective gas N2/H2=46:
In 4 (volume ratios), sintered 2 hours with 900 DEG C of temperature, then proceed to be warming up to after 1450 DEG C of temperature are sintered 6 hours and be cooled to room
Temperature；Take out after attrition grinding is sieved and obtain fluorescent material Ca2Gd0.97Ce0.03Hf2Al3O12。
Claims (8)
1. a kind of LED use can send the fluorescent material of cyan light, it is characterised in that the formula of the fluorescent material is Ca2A1-xB2C3O12:xCe；
Wherein A is one or more in Lu, Y, La or Gd；B be Hf or Zr in one or two；C be Al or Ga in one kind or
Two kinds；Activator is Ce ions；
Wherein, 0.01≤x≤0.06.
2. LED use according to claim 1 can send the fluorescent material of cyan light, it is characterised in that the chemical group of the fluorescent material
Become Ca2Lu0.97Ce0.03Hf2Al3O12。
3. LED use according to claim 1 can send the fluorescent material of cyan light, it is characterised in that the chemical group of the fluorescent material
Become Ca2Lu0.5Y0.49Ce0.01HfZrAl3O12。
4. LED use according to claim 1 can send the fluorescent material of cyan light, it is characterised in that the chemical group of the fluorescent material
Become Ca2Lu0.5Y0.44Ce0.06Hf2Ga3O12。
5. LED use according to claim 1 can send the fluorescent material of cyan light, it is characterised in that the chemical group of the fluorescent material
Become Ca2La0.97Ce0.03HfZrAl3O12。
6. LED use according to claim 1 can send the fluorescent material of cyan light, it is characterised in that the chemical group of the fluorescent material
Become Ca2Gd0.97Ce0.03Hf2Al3O12。
7. any one LED use according to claims 1 to 6 can send the fluorescent material of cyan light, and its preparation method is as follows：
1) raw material is weighed according to chemical general formula, wherein Ca passes through its carbonate or oxide is introduced, and A, B and C pass through its oxide
Introduce, Ce is also introduced in the form of its oxide；
2) raw material for weighing is sufficiently mixed into grinding and obtains mixed material powder；
3) by obtained material powder load corundum crucible in, be placed in reducing atmosphere, at 1400～1500 DEG C insulation 4～
8h, cools to room temperature with the furnace；
4) product of sintering is taken out grinding, is sieved, obtain garnet-base hanced cyan fluorescent powder.
8. LED use according to claim 7 can send the preparation method of the fluorescent material of cyan light, it is characterised in that go back Primordial Qi
Reducibility gas in atmosphere are H2, volume content is 5%～10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610933462.8A CN106520119B (en) | 2016-10-24 | 2016-10-24 | A kind of fluorescent powder and preparation method thereof of capable of emitting cyan light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610933462.8A CN106520119B (en) | 2016-10-24 | 2016-10-24 | A kind of fluorescent powder and preparation method thereof of capable of emitting cyan light |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106520119A true CN106520119A (en) | 2017-03-22 |
| CN106520119B CN106520119B (en) | 2018-12-07 |
Family
ID=58292580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610933462.8A Expired - Fee Related CN106520119B (en) | 2016-10-24 | 2016-10-24 | A kind of fluorescent powder and preparation method thereof of capable of emitting cyan light |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106520119B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107459990A (en) * | 2017-08-17 | 2017-12-12 | 河北华人信通建设有限公司 | A kind of green emitting phosphor and preparation method |
| CN107722983A (en) * | 2017-09-20 | 2018-02-23 | 木林森股份有限公司 | L ED fluorescent powder and preparation method thereof |
| CN111908910A (en) * | 2020-08-18 | 2020-11-10 | 新沂市锡沂高新材料产业技术研究院有限公司 | High-color-rendering-index transparent ceramic for warm white lighting and preparation method thereof |
| CN114149259A (en) * | 2021-11-24 | 2022-03-08 | 海南钇坤智能科技有限公司 | Laser ceramic material for inhibiting ion conversion |
| US11326099B2 (en) * | 2019-10-30 | 2022-05-10 | GE Precision Healthcare LLC | Ceramic scintillator based on cubic garnet compositions for positron emission tomography (PET) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104918892A (en) * | 2012-12-20 | 2015-09-16 | 松下知识产权经营株式会社 | Rare earth aluminum garnet-type inorganic oxide, phosphor and light-emitting device using same |
| EP3053987A1 (en) * | 2013-09-30 | 2016-08-10 | Panasonic Intellectual Property Management Co., Ltd. | Phosphor, light-emitting device using same, illumination light source, and illumination device |
-
2016
- 2016-10-24 CN CN201610933462.8A patent/CN106520119B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104918892A (en) * | 2012-12-20 | 2015-09-16 | 松下知识产权经营株式会社 | Rare earth aluminum garnet-type inorganic oxide, phosphor and light-emitting device using same |
| EP3053987A1 (en) * | 2013-09-30 | 2016-08-10 | Panasonic Intellectual Property Management Co., Ltd. | Phosphor, light-emitting device using same, illumination light source, and illumination device |
Non-Patent Citations (3)
| Title |
|---|
| JIYOU ZHONG等: "Synthesis, Crystal Structures, and Photoluminescence Properties of Ce3+-Doped Ca2LaZr2Ga3O12: New Garnet Green-Emitting Phosphors for White LEDs", 《J. PHYS. CHEM. C》 * |
| XICHENG WANG等: "Synthesis, Structure, and Photoluminescence Properties of Ce3+-Doped Ca2YZr2Al3O12: A Novel Garnet Phosphor for White LEDs", 《J. PHYS. CHEM. C》 * |
| XINGHONG GONG等: "Novel Garnet-Structure Ca2GdZr2(AlO4)3:Ce3+ Phosphor and Its Structural Tuning of Optical Properties", 《INORG. CHEM. 》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107459990A (en) * | 2017-08-17 | 2017-12-12 | 河北华人信通建设有限公司 | A kind of green emitting phosphor and preparation method |
| CN107459990B (en) * | 2017-08-17 | 2020-09-08 | 河北华人信通建设有限公司 | Green fluorescent powder and preparation method thereof |
| CN107722983A (en) * | 2017-09-20 | 2018-02-23 | 木林森股份有限公司 | L ED fluorescent powder and preparation method thereof |
| US11326099B2 (en) * | 2019-10-30 | 2022-05-10 | GE Precision Healthcare LLC | Ceramic scintillator based on cubic garnet compositions for positron emission tomography (PET) |
| CN111908910A (en) * | 2020-08-18 | 2020-11-10 | 新沂市锡沂高新材料产业技术研究院有限公司 | High-color-rendering-index transparent ceramic for warm white lighting and preparation method thereof |
| CN111908910B (en) * | 2020-08-18 | 2022-04-22 | 新沂市锡沂高新材料产业技术研究院有限公司 | High-color-rendering-index transparent ceramic for warm white lighting and preparation method thereof |
| CN114149259A (en) * | 2021-11-24 | 2022-03-08 | 海南钇坤智能科技有限公司 | Laser ceramic material for inhibiting ion conversion |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106520119B (en) | 2018-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104726101B (en) | White light LEDs single-substrate white launches fluorophosphate fluorescent material and preparation method | |
| CN106520119B (en) | A kind of fluorescent powder and preparation method thereof of capable of emitting cyan light | |
| KR20150065802A (en) | Oxynitride orange-red fluorescent substance and light-emitting film or light-emitting sheet and light-emitting device comprising same | |
| CN104877675A (en) | Mixed-valence-state europium (Eu) ion doped single-matrix color-adjustable fluorescent powder and preparation method thereof | |
| CN107189776A (en) | A kind of green silicate long after glow luminous material and preparation method thereof | |
| CN110642624A (en) | Fluorescent transparent ceramic emitting blue-green light and preparation method thereof | |
| CN101307228B (en) | Chlorine-aluminosilicate fluorescent powder and method for preparing same | |
| CN101250407A (en) | Borosilicate fluorescent powder and method for making same | |
| CN103881705A (en) | Cerium, terbium or europium codoping activated aluminosilicate blue green fluorescent powder and preparation method thereof | |
| CN110003908B (en) | Silicate red fluorescent powder for white L ED (light-emitting diode), preparation method thereof and white L ED light-emitting device | |
| CN105349147A (en) | Ultraviolet-to-blue light excited phosphate-based red fluorescent powder and preparation method thereof | |
| CN106634997A (en) | Composite phosphate fluorophor and application thereof | |
| CN105670613A (en) | Non-rare-earth-ion-doped silicate yellow fluorescent powder, and preparation method and application thereof | |
| JPWO2016199406A1 (en) | Phosphor and method for manufacturing the same, and LED lamp | |
| CN101486910A (en) | Green phosphor for white light LED and preparation thereof | |
| CN103468249B (en) | Eu<2+> activated sodium-calcium silicate green phosphor and preparation and application | |
| CN105778904B (en) | A kind of gallium aluminium hydrochlorate base fluorescent material and preparation method thereof | |
| CN110591711B (en) | Gallate red fluorescent powder for white light LED and preparation method thereof | |
| CN104962286A (en) | Garnet-structure multiphase fluorescent material and preparation method thereof | |
| CN102703066A (en) | Fluorosilicate fluorescent powder and preparation method thereof | |
| CN102373062B (en) | Fluosilicate red fluorescent powder suitable for white-light LED (Light-Emitting Diode) and preparation method thereof | |
| CN108034423B (en) | Mn (manganese)2+Ion-doped silicate red fluorescent powder, preparation method and application | |
| CN108276998B (en) | Trivalent samarium ion doped barium gadolinium titanate red fluorescent powder and preparation method thereof | |
| WO2010130075A1 (en) | Full-color light-emitting material and preparation method thereof | |
| CN104212457A (en) | Fluoroborosilicate-based red phosphor, and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181207 Termination date: 20191024 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |