氧化型垂直腔面发射器的常见失效模式和机理分析 -

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氧化型垂直腔面发射器的常见失效模式和机理分析

张玉岐^{1, 2,},
左致远^1,,
阚强^3,,
赵佳^{1, 4,,}

1.
山东大学与红外系统集成技术教育部重点实验室，山东青岛 266237
2.
厦门市三安集成电路有限公司，福建厦门 361000
3.
中国科学院半导体研究所，北京 100083
4.
山东大学信息科学与工程学院，山东青岛 266237

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中图分类号:TN365
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出版历程
- 收稿日期:2021-11-22
- 录用日期:2021-12-24
- 修回日期:2021-12-10
- 网络出版日期:2021-12-24
- 刊出日期:2022-03-21

Common failure modes and mechanisms in oxide vertical cavity surface emitting lasers

doi:10.37188/CO.EN.2021-0012

ZHANG Yu-qi^{1, 2,},
ZUO Zhi-yuan^1,,
KAN Qiang^3,,
ZHAO Jia^{1, 4,,}

1.
Key Laboratory of Laser & Infrared System, Shandong University, Qingdao 266237, China
2.
Xiamen San 'An Integrated Circuit Co., LTD, Xiamen 361000, China
3.
Institute of Semiconductors, University of Chinese Academy of Sciences, Beijing 100083, China
4.
School of Information Science and Engineering, Shandong University, Qingdao 266237, China

Funds:Supported by the Nano Special Project of National Key Research and Development Program(No. 2018YFA0209001); National Key Research and Development Project(No. 2018YFA0209002, No. 2018YFB2200700)

More Information

Author Bio:
ZHANG Yu-qi (1991—), male, was born in Liaoyang, Liaoning province. He received his Master degree from Harbin Institute of Technology in 2015. Currently, he is a Ph.D student in Key Laboratory of Laser&Infrared System on Shandong University and a senior engineer in Xiamen San’An Integrated Circuit Co., LTD. His research interests are on reliability and failure analysis of semiconductor lasers. E-mail:zyxzyq@163.com
ZUO Zhi-yuan (1984—), male, was born in Dezhou, Shandong province. He received his Ph.D degree from Shandong University in 2012. Currently, he is an associate professor in Key Laboratory of Laser & Infrared System on Shandong University. His research interests are the design and fabrication of heterogeneous integrated optoelectronic devices. E-mail:zuozhiyuan@sdu.edu.cn
KAN Qiang (1977—), male, Researcher, Doctoral supervisor. He received his Ph.D degree from University of Chinese Academy of Sciences in 2005. His research interests are on photonic crystal microcavity laser and photonic crystal vertical cavity surface emitting laser. E-mail:kanqiang@semi.ac.cn
ZHAO Jia (1984—), male, was born in Jinan, Shandong province. He received his Ph.D degree from Shandong University in 2011. Currently, he is a professor in School of Information Science and Engineering on Shandong University. His research interests are on optoelectronic devices and system design, computational electromagnetics, etc. E-mail:zhaojia@sdu.edu.cn

Corresponding author:zhaojia@sdu.edu.cn

摘要

摘要:氧化型垂直腔面发射器（VCSEL）在高速光通信中有着广泛的应用，应用过程中的可靠性是一个非常重要的指标，要求有高寿命和低失效率。为了更好地了解VCSEL在应用过程中的失效模式和机理，提升器件的可靠性，本文从器件设计、加工制造和应用过程等3个环节总结分析了氧化型VCSEL的常见失效模式、产生原因和机理，并提出了适当的改善措施和建议。其中，对氧化应力、静电放电和湿气腐蚀这3个主要失效因素进行了更为详细的分析。基于以上对业界研究工作的总结和分析，最后对实际工作中遇到的VCSEL失效案例进行简单的介绍，为VCSEL学者、研发设计、制造和使用人员提供一个较为全面的失效分析案例库。
- VCSEL/
- 氧化物/
- 失效模式和机理/
- 可靠性
Abstract:Oxide Vertical Cavity Surface Emitting Lasers(VCSELs) are widely used in high-speed optical communications. The reliability of VCSELs is a very important index that requires a high lifetime and low failure rate in the application process. Understanding the root causes and mechanisms of VCSEL failure is necessary and helpful to improve device reliability. In this paper, we summarize and analyze the most common failure modes, causes and mechanisms observed in oxide VCSELs from the perspective of design, manufacturing and application, then apply some appropriate measures and suggestions to prevent or improve them. Moreover, the three dominating factors leading to the failure of VCSELs including oxide layer stress, Electronic Static Discharge (ESD) and humidity corrosion are introduced in more detail. At last, we simply introduce the VCSEL failure cases encountered in the actual accelerated aging verification process. This article can be used as a good VCSEL failure analysis library for chip development and production researchers.
- VCSEL/
- oxide/
- failure modes and mechanisms/
- reliability

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图 1氧化型VCSEL的结构示意图^[16]

Figure 1.Schematic diagram of the oxide VCSEL structure^[16]

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图 2铟含量对可靠性的影响^[19]

Figure 2.The effect of indium content on laser reliability^[19]

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图 3失效的VCSEL内位错的示意图^[25]

Figure 3.Trace diagram of DLD in a failed VCSEL viewed from the top and side^[25]

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图 4不同氧化层成分的横截面TEM（XS-TEM）图片^[24]。 (a) Al_0.98Ga_0.02As 氧化层；(b) AlAs氧化层

Figure 4.Cross-sectional TEM images of different oxide compositions^[24]. (a) Al_0.98Ga_0.02As oxide layer; (b) AlAs oxide layer

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图 5氧化物VCSEL台面边缘的XS-TEM照片^[29]

Figure 5.Cross-sectional TEM images of an oxide VCSEL mesa^[29]

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图 6位错网络轨迹的TEM图像^[30]

Figure 6.TEM images showing a tracing of the dislocation network^[30]

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图 7原始图(a)和无氧化物图(b)的截面图(扫描电镜)^[30]

Figure 7.Cross-sectional SEM images. (a)Original design. (b) Oxide free design^[30]

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图 8工艺过程引起失效VCSEL的平面TEM（PV-TEM）图像^[32]

Figure 8.Plan view TEM of failed VCSEL introduced during manufacturing^[32]

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图 9反向HBM模式损伤的TEM图片^[33]。(a) 平面图；(b) 截面图

Figure 9.TEM micrographs of a device subjected to a reverse HBM event^[33]. (a) Plan-view; (b) cross-section

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图 10正向HBM模式损伤的TEM图片^[33]。 (a) 平面图；(b) 截面图

Figure 10.TEM micrographs of a device subjected to a forward HBM event^[33]. (a) Plan-view; (b) cross-section

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图 11MM模式损伤的TEM图片^[33]。(a) 平面图；(b) 截面图

Figure 11.TEM micrographs of a device subjected to an MM event^[33]. (a) Plan-view; (b) cross-section

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图 12CDM模式损伤的TEM图片^[33]。(a) 平面图；(b) 截面图

Figure 12.TEM micrographs of a device subjected to a CDM event^[33]. (a) Plan-view; (b) cross-section

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图 13EOS模式损伤的TEM图片。(a) 平面图；(b) 截面图

Figure 13.TEM micrographs of a device subjected to an EOS event. (a) Plan-view; (b) cross-section

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图 14VCSEL 生产车间为防止静电放电所采取的预防措施^[30]

Figure 14.Preventive measures taken to prevent electrostatic discharge in VCSEL workshop^[30]

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图 15VCSEL和齐纳二极管封装图（Zener Diode）

Figure 15.VCSEL and Zener Diode package diagram

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图 16氧化型VCSEL湿热腐蚀下的位错TEM图片^[54-56]。(a)PV-TEM；(b)XS-TEM

Figure 16.Dislocation of oxide VCSEL under humidity corrosion^[54-56]. (a) PV-TEM; (b)XS-TEM

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图 17氧化型VCSEL湿热腐蚀下的半导体裂纹^[54-56]。（a）情形1；（b）情形2

Figure 17.Semiconductor crack of oxide VCSELs under humidity corrosion^[54-56]. (a) Case1; (b) Case2

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图 18氧化型VCSEL湿热腐蚀下的光窗表面退化SEM图片^[54-56]

Figure 18.SEM of aperture surface degradation of oxide VCSEL after humidity corrosion^[54-56]

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图 19VCSEL腐蚀失效机制示意图^[52]

Figure 19.Schematic diagram of VCSEL corrosion failure mechanism^[52]

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图 20使用环氧树脂对VCSEL进行保护^[25]

Figure 20.Coating epoxy resin to protect the VCSEL^[25]

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图 21刮伤引起DLD的示例^[11]

Figure 21.Example of DLD caused by scratch^[11]

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图 22案例1失效样品的TEM图片。（a）整体PV-TEM；（b）局部放大图；（c）XS-TEM图片

Figure 22.TEM images of Case 1. (a)Overall PV-TEM. (b)Partial enlargement in the (a) dotted box. (c)XS-TEM in the (b) dotted box

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图 23案例2失效样品的TEM图片。（a）整体PV-TEM；（b）局部放大图；（c）XS-TEM

Figure 23.TEM image of Case 2. (a)Overall PV-TEM. (b)Partial enlargement in the (a)dotted box. (c)XS-TEM

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图 24案例3失效样品的PV-TEM图片

Figure 24.PV-TEM images of Case 3

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表 1A summary of the easiness of formation of dislocation loops in some III-V compound semiconductors^[20]

Table 1.A summary of the easiness of formation of dislocation loops in some III-V compound semiconductors^[20]

Material	Band gap energy/eV@300K	Formation of dislocation loops
GaAs	1.42	Yes
AlGaAs	1.42~2.15	Yes
GaP	2.27	Yes
GaAsP	1.42~2.27	Yes
InP	1.34	No
InGaAsP on InP	0.75~1.34	No
InGaP on GaAs	1.42~1.91	Yes
InGaAsP on GaAs	1.42~1.76	Yes

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