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 PDFInfo
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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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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000007788 roughening Methods 0.000 title claims abstract description 14
- 238000001312 dry etching Methods 0.000 claims abstract description 8
- 239000000758 substrate Substances 0.000 claims abstract description 7
- 238000001259 photo etching Methods 0.000 claims abstract description 4
- 238000001465 metallisation Methods 0.000 claims description 7
- 238000005530 etching Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000003754 machining Methods 0.000 abstract 1
- 229920002120 photoresistant polymer Polymers 0.000 abstract 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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- 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
- H01L33/02—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 bodies
- H01L33/20—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 bodies with a particular shape, e.g. curved or truncated substrate
- H01L33/22—Roughened surfaces, e.g. at the interface between epitaxial layers
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- 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
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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
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:
在介质层上涂光刻胶进行光刻,形成图形;
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:
在介质层2上涂光刻胶3进行光刻,形成图形。
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。
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Citations (3)
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 |
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- 2012-12-04 CN CN201210508817.0A patent/CN103855256A/zh active Pending
Patent Citations (3)
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 |