CN110335845B - 一种MicroLED芯片的转移方法 - Google Patents

一种MicroLED芯片的转移方法 Download PDF

Info

Publication number
CN110335845B
CN110335845B CN201910551624.5A CN201910551624A CN110335845B CN 110335845 B CN110335845 B CN 110335845B CN 201910551624 A CN201910551624 A CN 201910551624A CN 110335845 B CN110335845 B CN 110335845B
Authority
CN
China
Prior art keywords
microled
substrate
wafer
electrode
transfer method
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.)
Active
Application number
CN201910551624.5A
Other languages
English (en)
Other versions
CN110335845A (zh
Inventor
樊勇
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 China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Semiconductor Display 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 China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to CN201910551624.5A priority Critical patent/CN110335845B/zh
Publication of CN110335845A publication Critical patent/CN110335845A/zh
Priority to PCT/CN2019/115953 priority patent/WO2020258644A1/zh
Application granted granted Critical
Publication of CN110335845B publication Critical patent/CN110335845B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/67Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
    • H01L21/683Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
    • H01L21/6835Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
    • H01L21/6836Wafer tapes, e.g. grinding or dicing support tapes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/16Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits
    • H01L25/167Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits comprising optoelectronic devices, e.g. LED, photodiodes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/62Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2221/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
    • H01L2221/67Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere
    • H01L2221/683Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping
    • H01L2221/68304Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
    • H01L2221/68372Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support used to support a device or wafer when forming electrical connections thereto
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2933/00Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
    • H01L2933/0008Processes
    • H01L2933/0033Processes relating to semiconductor body packages
    • H01L2933/0066Processes relating to semiconductor body packages relating to arrangements for conducting electric current to or from the semiconductor body

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Led Devices (AREA)
  • Led Device Packages (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

一种MicroLED芯片的转移方法,将ACF胶预先贴合于MicroLED晶圆上,再通过转移MicroLED芯片到TFT基板上,使MicroLED的电极与TFT的电极实现对位,再通过对压头的加热和压力实现,MicroLED的电极与TFT的电极的电性连接。本发明能有效节省ACF胶的使用量,提升ACF材料的利用率,避免材料浪费,避免由于TFT地形不平坦问题导致污染压头的现象。

Description

一种MicroLED芯片的转移方法
技术领域
本发明涉及显示技术领域,特别涉及一种MicroLED芯片的转移方法。
背景技术
在现有技术中,为了将MicroLED转移到TFT基板上以实现可靠的电性连接。
如图1所示,通常采用在转移MicroLED 6’前,在TFT基板4’上贴合整面的ACF胶3’,转移完MicroLED 6’后通过加压和加热使MicroLED 6’粘合在TFT基板4’上,使MicroLED的电极2’与TFT的电极5’实现对位。
然而,MicroLED 6’与TFT基板4’的贴合面积仅占像素显示区的很小部分,而该方法需要在TFT基板4’的整面上铺满包含导电粒子31’的ACF胶3’,因此,此方式显然存在大量材料的浪费。
同时,由于TFT基板4’不平坦还会导致污染压头的现象。
为解决上述MicroLED转移工艺中存在ACF胶用量大所导致的浪费问题及污染问题,本领域中进一步提出了一种如公开号CN107768487A公开的巨量转移电子元件的方法。
该方法是首先提供晶圆及以矩阵方式排列于基板表面上的电子元件。接着,将晶圆贴附于暂时性固定层。随后,切割晶圆,以使晶圆形成多个板块。各板块包括至少部分电子元件以及子基板。扩张暂时性固定层,以使暂时性固定层上的这些板块随着暂时性固定层扩张而彼此分离。接着,将这些板块中的至少一部分选定为预定接合部分,将此预定接合部分中的每一板块分次地转移于承载基板,以使在预定接合部分中的这些电子元件接合于承载基板。最后,移除这些板块的子基板。
然而,该种改性的方法依然存在各种步骤复杂,TFT不平坦等问题。
因此,还有必要提供一种新的MicroLED芯片的转移方法,以克服上述缺陷。
发明内容
本发明的目的在于提供一种预先胶合ACF的MicroLED转移方法。不但可以节省ACF胶的使用量,而且避免由于TFT不平坦导致的污染压头的现象。
为了达到上述目的,本发明提供一种MicroLED芯片的转移方法,将包含导电粒子的ACF胶预先贴合于MicroLED晶圆上,再通过转移MicroLED芯片到TFT基板上,使MicroLED的电极与TFT的电极实现对位,随后通过对压头的加热和压力实现MicroLED的电极与TFT的电极的电性连接。本发明方法使得ACF胶仅位于MicroLED晶圆下表面,可以有避免由于TFT基板不平坦问题导致在非LED绑定(bonding),从而污染压头的现象。
本发明具体步骤如下:
S1制作MicroLEDs晶圆,在一所述晶圆包括基板以及排列于该基板的表面上的MicroLED芯片,所述MicroLED芯片形成金属电极,在所述MicroLED芯片电极侧胶合ACF胶;
S2将MicroLEDs晶圆通过ACF胶侧粘合到临时基板上;
S3剥离MicroLEDs晶圆基板,将MicroLEDs晶圆切割为MicroLED单芯片;
S4将MicroLED单芯片与临时基板解胶,转移MicroLED单芯片至TFT基板。
本发明先在晶圆(晶片)上先形成异方性导电膜,然后再进行切割,以获得具有ACF膜的MicroLED单芯片结构,并进行后续的转移步骤。
在本发明的一实施例中,上述制作MicroLEDs晶圆步骤中,所述晶圆基板是蓝宝石基板。
在本发明的一实施例中,上述制作MicroLEDs晶圆步骤中,所述晶圆基板是氮化镓基板。
在本发明的一实施例中,上述制作MicroLEDs晶圆步骤中,所述晶圆基板是氮化铝基板。
在本发明的一实施例中,上述制作MicroLEDs晶圆步骤中,所述晶圆基板是硅基板。
在本发明的一实施例中,上述制作MicroLEDs晶圆步骤中,所述晶圆基板是砷化镓基板。
在本发明的一实施例中,上述制作MicroLEDs晶圆步骤中,所述晶圆基板是碳化硅基板。
在本发明的一实施例中,上述剥离MicroLEDs晶圆基板,是通过在蓝宝石侧照射激光,实现蓝宝石基板剥离。
在本发明的一实施例中,上述将MicroLED单芯片与临时基板解胶步骤中,所述临时基板解胶是通过紫外光照射解胶。
在本发明的一实施例中,上述将MicroLED单芯片与临时基板解胶步骤中,晶圆是2吋或4吋。
基于上述,在本发明的所述MicroLED转移方法中,透过在粘合MicroLEDs晶圆与临时基板前,在MicroLED芯片电极侧胶合ACF胶,因此本发明实施例中的MicroLED转移方法,大量节省ACF胶的使用量,提升ACF材料的利用率,避免材料浪费,且由于在ACF仅位于MicroLED下表面,可以有避免由于TFT地形不平坦问题导致污染压头的现象。
附图说明
图1是现有技术中MicroLED转移到TFT基板上的结构示意图;
图2是根据本发明一实施例的MicroLED转移方法的流程示意图;
图3A至图3E是图2所示MicroLED转移方法的步骤流程中对应的结构示意图。
具体实施方式
以下,结合具体实施方式,对本发明的技术进行详细描述。应当知道的是,以下具体实施方式仅用于帮助本领域技术人员理解本发明,而非对本发明的限定。
如图2是本发明所述MicroLED转移方法的流程示意图;图3A至图3E是与图2所示MicroLED转移方法的步骤流程对应的结构示意图。
如图2所示,在本实施例中提供一种MicroLED转移方法包括:步骤S1:制作MicroLEDs晶圆的步骤:步骤S2:将所述MicroLEDs晶圆1粘合到临时基板上的步骤:步骤S3:剥离MicroLEDs晶圆基板的步骤;以及,步骤S4:获得MicroLED芯片的步骤。
在所述步骤S1中,如图3A所示,首先在一基板S上制作MicroLEDs晶圆1,并在所述MicroLEDs晶圆1上设置用于形成MicroLED芯片的电极2。随后,在所述电极2上胶合ACF胶3。
在本实施例中,所述MicroLEDs晶圆1是2吋或4吋,但本发明并不以晶圆1的大小为限制。所述MicroLEDs晶元1的基板S,可以是,例如:蓝宝石基板(Sapphire Substrate)、氮化镓基板(Gallium Nitride Substrate)、氮化铝基板(Aluminum Nitride Substrate)、硅基板(Silicon Substrate)、砷化镓基板(Gallium Arsenide Substrate)或碳化硅基板(Silicon Carbide Substrate)等。在本实施例中采用蓝宝石基板。
所述MicroLEDs晶圆1的制作过程包括:首先通过金属有机物化学气相沉积设备在蓝宝石(Al2O3)衬底上制备出MicroLED的各类晶层,如:GaN buffer层/n型GaN,、多量子阱层(MQW)发光层/P型GaN;再在晶圆上形成ITO电流扩展层以及金属电极层,通过ICP(感应耦合等离子体蚀刻)工艺制作电极。最终,如图3A所示,获得具有电极2的MicroLEDs晶圆1,并在具有电极的MicroLEDs晶圆1制作完成后,在电极2侧胶合ACF胶3。
在所述步骤S2中,如图2和图3B所示,将所述MicroLEDs晶圆1通过ACF胶3侧粘合到临时基板7上。
在所述步骤S3中。如图2和图3C所示,利用激光剥离技术(Laser Lift-Off),通过在所述基板S侧照射266nm激光,使处于基板S与GaN界面处的GaN气化,从而剥离所述基板S。此时,如图3C所示,通过所述ACF胶3粘合在临时基板7上的仅为具有电极2的MicroLEDs晶圆1,而没有所述基板S。
接着,在所述步骤S3中,如图2和图3D所示,通过切割,将所述MicroLEDs晶圆1切割为多个MicroLED单芯片6。此时,所有MicroLED单芯片6通过所述ACF胶3粘合在临时基板7。并且,如图3D所示,所述ACF胶3也被一并切割。
在所述步骤S4中,在转移前,通过紫外光(ultraviolet)照射,实现MicroLED单芯片与临时基板解胶,即可通过转移设备的转移头把所述MicroLED单芯片6从临时基板7上取下并取放到一TFT基板4上。从而,如图3E所示,利用ACF胶3将MicroLED单芯片6的电极2与一TFT基板4的电极5实现对位,再通过对压头的加热和压力,实现MicroLED单芯片6的电极2与所述TFT基板4上的电极5电气连接。
本领域技术人员可以理解的是,本文中术语MicroLED指示尺寸小于100um的LED,又称uLED;术语ACF是指异方性导电胶膜,是Anisotropic Conductive Film的缩写。
基于上述,在本发明的所述MicroLED转移方法中,透过在粘合MicroLEDs晶圆与临时基板前,在MicroLED芯片电极侧胶合ACF胶,因此本发明实施例中的MicroLED转移方法,大量节省ACF胶的使用量,提升ACF材料的利用率,避免材料浪费,且由于在ACF仅位于MicroLED下表面,可以有避免由于TFT地形不平坦问题导致污染压头的现象。
发明已由上述相关实施例加以描述,然而上述实施例仅为实施本发明的范例。必需指出的是,已公开的实施例并未限制本发明的范围。相反地,包含于权利要求书的精神及范围的修改及均等设置均包括于本发明的范围内。

Claims (9)

1.一种MicroLED芯片的转移方法,其特征在于:具体步骤如下:
S1、制作MicroLED晶圆,所述晶圆包括基板以及排列于该基板表面上的MicroLED芯片,并在MicroLED芯片上形成金属电极,在所述MicroLED芯片电极侧胶合ACF胶;
S2、将MicroLED晶圆通过ACF胶侧粘合到临时基板上;
S3、剥离MicroLED晶圆基板,将MicroLED晶圆切割为MicroLED单芯片,所述 ACF 胶也被一并切割;
S4、将MicroLED单芯片与临时基板解胶,转移MicroLED单芯片至TFT基板,使MicroLED的电极侧ACF胶与TFT的电极实现对位,再通过对压头的加热和压力实现,MicroLED的电极与TFT的电极的电性连接。
2.根据权利要求1所述的转移方法,其特征在于,MicroLED 晶圆制作按下述步骤:首先,通过金属有机物化学气相沉积设备在晶圆基板上制备出MicroLED的各类晶层,包括:GaN 缓冲层、n型GaN、多量子阱层(MQW)发光层和P型GaN;再在晶圆上形成ITO电流扩展层以及金属电极层,通过感应耦合等离子体蚀刻(ICP)工艺制作电极,得到具有电极的MicroLED晶圆;然后,MicroLED晶圆中每个MicroLED的电极侧胶合ACF胶。
3.根据权利要求2所述的转移方法,其特征在于,所述晶圆基板是Al2O3基板。
4.根据权利要求2所述的转移方法,其特征在于,所述晶圆基板是氮化镓基板、氮化铝基板,或硅基板。
5.根据权利要求2所述的转移方法,其特征在于,所述晶圆基板是砷化镓基板。
6.根据权利要求2所述的转移方法,其特征在于,S1步骤中所述晶圆基板是碳化硅基板。
7.根据权利要求1所述的转移方法,其特征在于,S3步骤中所述剥离MicroLED晶圆基板,是通过在晶圆基板侧照射激光,实现晶圆基板剥离。
8.根据权利要求1所述的转移方法,其特征在于,S4步骤中所述临时基板解胶是通过紫外光照射解胶。
9.根据权利要求1所述的转移方法,其特征在于,所述晶圆是2吋或4吋。
CN201910551624.5A 2019-06-24 2019-06-24 一种MicroLED芯片的转移方法 Active CN110335845B (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201910551624.5A CN110335845B (zh) 2019-06-24 2019-06-24 一种MicroLED芯片的转移方法
PCT/CN2019/115953 WO2020258644A1 (zh) 2019-06-24 2019-11-06 一种microled芯片的转移方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910551624.5A CN110335845B (zh) 2019-06-24 2019-06-24 一种MicroLED芯片的转移方法

Publications (2)

Publication Number Publication Date
CN110335845A CN110335845A (zh) 2019-10-15
CN110335845B true CN110335845B (zh) 2021-10-01

Family

ID=68142373

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910551624.5A Active CN110335845B (zh) 2019-06-24 2019-06-24 一种MicroLED芯片的转移方法

Country Status (2)

Country Link
CN (1) CN110335845B (zh)
WO (1) WO2020258644A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110335845B (zh) * 2019-06-24 2021-10-01 深圳市华星光电半导体显示技术有限公司 一种MicroLED芯片的转移方法
CN112188663B (zh) * 2020-09-17 2022-11-04 Oppo(重庆)智能科技有限公司 呼吸灯模组、电子设备及其制备方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106486569A (zh) * 2015-08-27 2017-03-08 美科米尚技术有限公司 过渡性发光二极管以及制造发光二极管的方法
CN109148341A (zh) * 2018-10-16 2019-01-04 杭州众硅电子科技有限公司 一种cmp晶圆清洗设备
US10181507B2 (en) * 2014-09-25 2019-01-15 X-Celeprint Limited Display tile structure and tiled display
US10643879B2 (en) * 2016-09-30 2020-05-05 Xiamen Sanan Optoelectronics Technology Co., Ltd. Transfer head for transferring micro element and transferring method of micro element

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9698134B2 (en) * 2014-11-27 2017-07-04 Sct Technology, Ltd. Method for manufacturing a light emitted diode display
CN107768487A (zh) * 2016-08-18 2018-03-06 新世纪光电股份有限公司 巨量转移电子元件的方法
KR20180092056A (ko) * 2017-02-08 2018-08-17 한국광기술원 마이크로 led칩 분리 및 전사방법
TWI634371B (zh) * 2017-09-29 2018-09-01 台虹科技股份有限公司 微小元件的轉移方法
TWI636267B (zh) * 2018-02-12 2018-09-21 友達光電股份有限公司 發光二極體的檢測方法
CN110335845B (zh) * 2019-06-24 2021-10-01 深圳市华星光电半导体显示技术有限公司 一种MicroLED芯片的转移方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10181507B2 (en) * 2014-09-25 2019-01-15 X-Celeprint Limited Display tile structure and tiled display
CN106486569A (zh) * 2015-08-27 2017-03-08 美科米尚技术有限公司 过渡性发光二极管以及制造发光二极管的方法
US10643879B2 (en) * 2016-09-30 2020-05-05 Xiamen Sanan Optoelectronics Technology Co., Ltd. Transfer head for transferring micro element and transferring method of micro element
CN109148341A (zh) * 2018-10-16 2019-01-04 杭州众硅电子科技有限公司 一种cmp晶圆清洗设备

Also Published As

Publication number Publication date
WO2020258644A1 (zh) 2020-12-30
CN110335845A (zh) 2019-10-15

Similar Documents

Publication Publication Date Title
CN112967984B (zh) 微芯片的巨量转移方法及显示背板
CN107251237B (zh) 微发光二极管的修复方法、制造方法、装置和电子设备
CN105493297B (zh) 微发光二极管的转移方法、制造方法、装置和电子设备
CN107889540B (zh) 微发光二极管的转移方法、制造方法、装置和电子设备
TWI258184B (en) Device transfer method, and device array method and image display unit production method using the same
JP4461616B2 (ja) 素子の転写方法、素子保持基板の形成方法、及び素子保持基板
JP5740939B2 (ja) 半導体装置の製造方法
KR100982964B1 (ko) 소자 전사 방법 및 표시장치
CN110335845B (zh) 一种MicroLED芯片的转移方法
CN105518877A (zh) 微发光二极管的预排除方法、制造方法、装置和电子设备
US10658220B2 (en) Device transferring method
JP2009516929A5 (zh)
TW200810154A (en) Method of arranging powder layer on substrate and layer structure with at least one powder layer on substrate
JP3994681B2 (ja) 素子の配列方法及び画像表示装置の製造方法
TWI289943B (en) Manufacturing method for semiconductor light emitting device
JP2020068313A (ja) 発光素子および表示装置の製造方法
TW201526279A (zh) 半導體堆疊體的拉伸分離
JP2003209295A (ja) 電子部品及びその製造方法、これを用いた画像表示装置
JP2003347524A (ja) 素子の転写方法、素子の配列方法及び画像表示装置の製造方法
CN112768370B (zh) 微元件的转移方法及转移装置
JP2003332523A (ja) 素子の転写方法、素子の配列方法及び画像表示装置の製造方法
CN116632125A (zh) 用于微型发光二极管巨量转移的流体组装载体衬底系统
CN112968082B (zh) 一种发光器件结构制作方法、显示背板及显示装置
JP2002314123A (ja) 素子の転写方法及びこれを用いた素子の配列方法、画像表示装置の製造方法
CN116314540A (zh) micro-LED芯片的衬底剥离与键合方法

Legal Events

Date Code Title Description
PB01 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