McPhillimy John, Jevtics Dimitars, Guilhabert Benoit J E, Klitis Charalambos, Hurtado Antonio, Sorel Marc, Dawson Martin D, Strain Michael J
Institute of Photonics, SUPA Department of Physics, University of Strathclyde, Glasgow, United Kingdom.
School of Engineering, University of Glasgow, Glasgow, United Kingdom.
ACS Appl Nano Mater. 2020 Oct 23;3(10):10326-10332. doi: 10.1021/acsanm.0c02224. Epub 2020 Sep 23.
The heterogeneous integration of micro- and nanoscale devices with on-chip circuits and waveguide platforms is a key enabling technology, with wide-ranging applications in areas including telecommunications, quantum information processing, and sensing. Pick and place integration with absolute positional accuracy at the nanoscale has been previously demonstrated for single proof-of-principle devices. However, to enable scaling of this technology for realization of multielement systems or high throughput manufacturing, the integration process must be compatible with automation while retaining nanoscale accuracy. In this work, an automated transfer printing process is realized by using a simple optical microscope, computer vision, and high accuracy translational stage system. Automatic alignment using a cross-correlation image processing method demonstrates absolute positional accuracy of transfer with an average offset of <40 nm (3σ < 390 nm) for serial device integration of both thin film silicon membranes and single nanowire devices. Parallel transfer of devices across a 2 × 2 mm area is demonstrated with an average offset of <30 nm (3σ < 705 nm). Rotational accuracy better than 45 mrad is achieved for all device variants. Devices can be selected and placed with high accuracy on a target substrate, both from lithographically defined positions on their native substrate or from a randomly distributed population. These demonstrations pave the way for future scalable manufacturing of heterogeneously integrated chip systems.
微纳尺度器件与片上电路及波导平台的异质集成是一项关键使能技术,在电信、量子信息处理和传感等领域有着广泛应用。此前已针对单个原理验证器件展示了纳米级绝对位置精度的拾取和放置集成。然而,为了实现该技术的规模化以制造多元素系统或进行高通量制造,集成过程必须与自动化兼容,同时保持纳米级精度。在这项工作中,通过使用简单的光学显微镜、计算机视觉和高精度平移台系统实现了一种自动转移印刷工艺。使用互相关图像处理方法进行的自动对准展示了转移的绝对位置精度,对于薄膜硅膜和单纳米线器件的串行器件集成,平均偏移量<40 nm(3σ<390 nm)。在2×2 mm区域内对器件进行并行转移,平均偏移量<30 nm(3σ<705 nm)。所有器件变体的旋转精度均优于45 mrad。器件可以从其原始衬底上光刻定义的位置或从随机分布的群体中高精度地选择并放置在目标衬底上。这些演示为未来异质集成芯片系统的可扩展制造铺平了道路。