赵宁
Professor Supervisor of Doctorate Candidates Supervisor of Master's Candidates
Main positions:材料科学与工程学院副院长
Gender:Male
Alma Mater:Dalian University of Technology
Degree:Doctoral Degree
School/Department:School of Materials Science and Engineering
Discipline:Materials Science
E-Mail:zhaoning@dlut.edu.cn
Hits:
Indexed by:期刊论文
Date of Publication:2016-12-01
Journal:INTERMETALLICS
Included Journals:SCIE、EI、Scopus
Volume:79
Page Number:28-34
ISSN No.:0966-9795
Key Words:Intermetallics; 3D packaging; Synchrotron radiation; Thermomigration; Micro interconnect; Interfacial reaction
Abstract:Multiple reflows are often required in 3D packaging. To elucidate the effect of temperature gradient during subsequent reflow on existing intermetallic compounds (IMCs), Cu6Sn5 IMC layers were initially formed in Cu/Sn/Cu micro interconnects. Upon subsequent reflow, synchrotron radiation real-time imaging technology was used to in situ study the dissolution and precipitation behavior of the pre-formed Cu6Sn5 under different temperature gradients. The pre-formed Cu6Sn5 IMC at the cold end continued to grow linearly with increasing aspect ratio, whereas that at the hot end dissolved linearly and then maintained a critical thin layer. The thick pre-formed Cu6Sn5 IMC at the hot end significantly hindered the dissolution of the neighboring Cu substrate until a dynamic equilibrium between chemical potential gradient and temperature gradient was satisfied. The thermomigration of Cu atoms from the hot end towards the cold end was responsible for the asymmetrical evolution of the interfacial Cu6Sn5 between the cold and hot ends. A theoretical model was proposed based on Cu diffusion flux to calculate the IMC thickness at the both ends as a function of reflow time and the equilibrium IMC thickness at the hot end under temperature gradient. (C) 2016 Elsevier Ltd. All rights reserved.
赵宁,工学博士,教授,博士生导师,现任材料科学与工程学院副院长。《Scientific Reports》期刊编委,IEEE会员、IEEE-EPS会员,中国电子学会(电子制造与封装技术分会)、中国材料研究学会、中国机械工程学会高级会员。
2003年本科毕业于东北大学材料物理专业,2008年博士毕业于大连理工大学材料学专业。2009年至2011年在中科院微电子研究所系统封装技术研究室从事博士后研究,2011年加入大连理工大学材料学院,同年评为副教授,2017年评为博士生导师,2018年评为教授。2016年至2017年在美国佐治亚理工学院做访问学者,合作学者为美国工程院院士、中国工程院外籍院士C.P. Wong教授。
主要从事电子封装微互连材料与技术的基础理论及应用研究,重点围绕微互连方法与成型机理,微焊点晶粒生长调控、组织演变、热迁移行为与可靠性测试分析,晶圆级互连技术,无铅焊料及BGA焊球开发与组织控制,低电阻率电镀铜膜/线等方面开展深入研究。
主持国家自然科学基金(4项)、省部级科研项目十余项,参与多项国家科技重大专项等项目。在Acta Mater.、Mater. Des.、J. Mater. Sci. Tech.、Appl. Phys. Lett.、Scripta Mater.、J. Mater. Process. Tech.、Sci. Rep.、J. Alloys Compd.、Appl. Surf. Sci.、Mater. Charact.、Intermetallics、Mater. Res. Bull.、J. Appl. Phys.、Mater. Lett.、Mater. Chem. Phys.、J. Mater. Res.、J. Electron. Mater.、物理学报、金属学报、中国有色金属学报(英文版)、稀有金属材料与工程等期刊上发表学术论文100余篇;在ECTC、ICEPT、CSTIC、EPTC等国际学术会议上发表EI论文60余篇,5次获得最佳论文奖;获中国发明专利授权25项。入选辽宁省“百千万人才工程”、大连市高层次人才计划。
指导学生:
在读硕士生11人,博士生6人。
已毕业博士生3、硕士生15人。
指导研究生多次获得国家奖学金、省优秀毕业生、市三好学生、校优秀博士/硕士研究生、优秀学位论文等荣誉。
欢迎有意从事微电子制造、微电子封装行业,具有材料、机械、物理、微电子专业背景,勤奋好学、积极乐观的学子们加入本课题组!