通过火形成纹表面来增强铜结合接口
Tsan-Feng Lu1, Yu-Ting Yen1, Pei-Wen Wang1
1Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.
Nanomaterials (Basel, Switzerland)
|May 24, 2024
概括
研究人员开发了一种用于铜 (Cu) 膜的新型火处理方法,以克服半导体制造业的局限性. 这种方法在较低的温度下增强了Cu-Cu粘合,提高了先进的集成电路的可靠性.
科学领域:
- 材料科学 材料科学 材料科学
- 半导体制造业 半导体制造业
- 纳米技术纳米技术
背景情况:
- 摩尔定律正在接近其物理极限,需要新的半导体小型化方法.
- 三维集成电路 (3D-ICs) 提供了一个有前途的替代方案,铜与铜 (Cu-Cu) 结合是关键的启用技术.
- 在Cu-Cu结合中,低原子扩散率低于300°C,会造成弱接口和可靠性问题.
研究的目的:
- 研究一种用于膜的新型火处理方法,以增强-结合.
- 为应对由于低温粘合限制导致的3D-IC中弱接口的挑战.
- 提高纳米级集成电路的可靠性.
主要方法:
- 在Cu薄膜表面施加火处理,诱导应变能量.
- 在Si基板和Cu膜之间的热膨胀系数的变化造成了纹的表面形态.
- 在火处理后,Cu-Cu粘合在300°C进行了2个和4个小时.
主要成果:
- 火处理诱导了Cu薄膜中的应变能量和纹表面形态.
- 在300°C结合后,在Cu-Cu结合接口上观察到显著的颗粒生长.
- 粘接接口被有效地消除了,表明了强大的粘接.
结论:
- 开发的火处理成功地在300°C以下的温度下增强了Cu-Cu粘合.
- 这种方法减轻了弱接口问题,为更可靠的3D-IC铺平了道路.
- 该技术为克服半导体缩放中摩尔定律的局限性提供了一个可行的解决方案.
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