CN103855256A - 一种用于发光二极管的粗化方法 - Google Patents

一种用于发光二极管的粗化方法 Download PDF

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CN103855256A
CN103855256A CN201210508817.0A CN201210508817A CN103855256A CN 103855256 A CN103855256 A CN 103855256A CN 201210508817 A CN201210508817 A CN 201210508817A CN 103855256 A CN103855256 A CN 103855256A
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dielectric layer
roughening
emitting diode
dry etching
light emitting
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王立彬
李宁宁
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TONGFANG OPTO-ELECTRONIC Co Ltd
Tsinghua Tongfang Co Ltd
Tongfang Co Ltd
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TONGFANG OPTO-ELECTRONIC Co Ltd
Tongfang Co Ltd
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    • 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
    • H01L33/02Semiconductor 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 bodies
    • H01L33/20Semiconductor 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 bodies with a particular shape, e.g. curved or truncated substrate
    • H01L33/22Roughened surfaces, e.g. at the interface between epitaxial layers
    • 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
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  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
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  • Led Devices (AREA)
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Abstract

一种用于发光二极管的粗化方法,涉及光电技术领域。本发明使用包括衬底和在衬底上生长的外延片,其方法步骤为:1)在器件加工面上沉积介质层;2)在介质层上涂光刻胶进行光刻,形成图形;3)在介质层上进行干法刻蚀,形成粗化表面。本发明方法通过在干法刻蚀前沉积一层介质层,使界面粗化,有效提高LED芯片的亮度。

Description

一种用于发光二极管的粗化方法
技术领域
 本发明涉及光电技术领域,特别是用于发光二极管的粗化方法。
背景技术
LED目前是市场上广泛应用的产品,随着光效的增加,其应用领域越来越广。粗化工艺是光电器件广泛应用的技术,尤其是在LED产品中。
现有技术中,在光电技术领域,尤其是LED芯片技术中,粗化工艺得到广泛应用,其中衬底的PSS(图形化衬底)结构,P-GaN的外延粗化,以及湿法刻蚀实现的N-GaN的表面粗化都得到了生产的实际应用。但是,这种方法粗化后的芯片亮度效果仍然不够理想。
发明内容
针对上述现有技术中的不足,本发明的目的是提供一种用于发光二极管的粗化方法。它通过在干法刻蚀前沉积一层介质层,使界面粗化,有效提高LED芯片的亮度。
    为了达到上述发明目的,本发明的技术方案以如下方式实现:
一种用于发光二极管的粗化方法,它包括衬底和在衬底上生长的外延片,其步骤为:
Figure 2012105088170100002DEST_PATH_IMAGE002
在器件加工面上沉积介质层;
在介质层上涂光刻胶进行光刻,形成图形;
Figure 456677DEST_PATH_IMAGE004
在介质层上进行干法刻蚀,形成粗化表面。
在上述粗化方法中,所述介质层材料为ITO或者ZnO,沉积介质层的方法采用蒸镀或者溅射形成。
本发明由于采用了上述方法,在加工面上沉积介质层,然后进行干法刻蚀,使形成粗化表面,有效提高LED芯片的亮度。
下面结合附图和具体实施方式对本发明作进一步说明。
附图说明
    图1至图2为本发明实施例中的粗化方法流程图。
具体实施方式
参看图1至图2,使用本发明方法的外延片1可以是GaN外延片,也可以是其他发光材料的外延片,或外延片的衬底。此处外延片1以GaN外延片为例。粗化方法的步骤为:
Figure 436134DEST_PATH_IMAGE002
在器件加工面上沉积介质层2;介质层2材料为ITO或者ZnO,沉积介质层2的方法采用蒸镀或者溅射形成。
在介质层2上涂光刻胶3进行光刻,形成图形。
Figure 424130DEST_PATH_IMAGE004
在介质层2上进行ICP刻蚀或者RIE刻蚀的干法刻蚀,形成粗化表面4。
本发明方法中的介质层2可以是整面的,也可以是图形化的,即器件局部没有介质层2。

Claims (3)

1.一种用于发光二极管的粗化方法,它包括衬底和在衬底上生长的外延片(1),其步骤为:
在器件加工面上沉积介质层(2);
Figure DEST_PATH_IMAGE004
在介质层(2)上涂光刻胶(3)进行光刻,形成图形;
Figure DEST_PATH_IMAGE006
在介质层(2)上进行干法刻蚀,形成粗化表面(4)。
2.根据权利要求1所述的粗化方法,其特征在于,所述介质层(2)材料为ITO或者ZnO,沉积介质层(2)的方法采用蒸镀或者溅射形成。
3.根据权利要求1或2所述的粗化方法,其特征在于,所述干法刻蚀采用ICP刻蚀或者RIE刻蚀。
CN201210508817.0A 2012-12-04 2012-12-04 一种用于发光二极管的粗化方法 Pending CN103855256A (zh)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7501665B2 (en) * 2005-10-28 2009-03-10 Kabushiki Kaisha Toshiba Semiconductor light emitting device and method of manufacturing same and semiconductor light emitting apparatus
CN102064088A (zh) * 2010-10-11 2011-05-18 山东华光光电子有限公司 一种干法与湿法混合制备蓝宝石图形衬底的方法
CN101976712B (zh) * 2010-08-25 2012-02-08 中国科学院半导体研究所 一种增强led出光效率的粗化方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7501665B2 (en) * 2005-10-28 2009-03-10 Kabushiki Kaisha Toshiba Semiconductor light emitting device and method of manufacturing same and semiconductor light emitting apparatus
CN101976712B (zh) * 2010-08-25 2012-02-08 中国科学院半导体研究所 一种增强led出光效率的粗化方法
CN102064088A (zh) * 2010-10-11 2011-05-18 山东华光光电子有限公司 一种干法与湿法混合制备蓝宝石图形衬底的方法

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Application publication date: 20140611