全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
电子学报  2014 

掩膜电镀法制备圆片级封装重布线中孔洞形成机理研究

, PP. 411-416

Keywords: 电镀铜,孔洞,退火

Full-Text   Cite this paper   Add to My Lib

Abstract:

在圆片级封装电镀铜重布线工艺中通常使用退火的方法促进铜晶粒生长、使电阻减小.而作为电镀铜种子层的溅射铜表面存在的微小裂纹通常会造成电镀液无法进入,从而使电镀铜和溅射铜界面出现孔铜,这类界面缺陷将影响后续高温退火过程中铜晶粒的生长,并导致电镀铜电阻增大.为研究此问题,本文尝试在电镀铜前轻微腐蚀溅射铜种子层,使裂纹尺寸变大,电镀液得以进入裂纹,并电镀填充裂纹形成无孔洞的电镀铜;此外若在电镀铜后在电镀铜表面溅射一层TaN层可限制高温下铜原子运动,使电镀铜经受300℃退火10分钟而不形成孔洞,高温退火同时可使得铜晶粒长大,电阻变小.

References

[1]  Philip Garrou, Wafer level chip scale packaging (WL-CSP):an overview[J].IEEE Transactions on Advanced Packaging, 2000, 23(2):198-205.
[2]  尹立孟, 张新平.电子封装微互连中的电迁移[J].电子学报, 2008, 36(8):1610-1614. Yin Li-meng, Zhang Xin-ping.Electromigration in micro-interconnections of electronic packaging[J].Acta Electronica Sinica, 2008, 36(8):1610-1614.(in Chinese )
[3]  阮刚, 等.VLSI电路中互连线的延迟及串扰的数值模拟[J].电子学报, 2000, 28(5): 142-144. Ruan Gang, et al.Numerical simulation of time delay and cross-talk noise for the interconnect in VLSI circuits[J].Acta Electronica Sinica, 2000, 28(5):142-144.(in Chinese )
[4]  李志国, 卢振钧.ULSI中铜互连线通孔电热性能的数值模拟[J].电子学报, 2003, 31(7):1104-1106. Li Zhi-guo, et al.Numerical simulation of electric and thermal characteristic in ULSI copper-filled inteconnect via hole[J].Acta Electronica Sinica, 2003, 31(7):1104-1106.(in Chinese)
[5]  C C Yang, et al.Stress control during thermal annealing of copper interconnects[J].Applied Physics Letters, 2011, 98:051911-051913.
[6]  S-K Ryu, et al.Characterization of thermal stresses in through-silicon vias for three-dimensional interconnects by bending beam technique[J].Applied Physics Letters, 2012, 100:041901-041904.
[7]  P C Andricacos, et al.Damascene copper electroplating for chip interconnections.IBM Journal of Research and Development, 1998, 42(5):567-574.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133