固件
计算机科学
激光烧蚀
脉冲激光沉积
激光器
计算机硬件
材料科学
模块化设计
执行机构
光学
人工智能
物理
操作系统
作者
Juan Manuel Conde Garrido,Cristina Kuo,Josefina María Silveyra
出处
期刊:IEEE Latin America Transactions
[Institute of Electrical and Electronics Engineers]
日期:2020-02-01
卷期号:18 (02): 438-445
被引量:3
标识
DOI:10.1109/tla.2020.9085301
摘要
The pulsed laser ablation process is a widely used technique for thin films deposition. In this method, a pulsed laser beam focuses onto a target ablating the impact site, called spot. Since preparing the target is a highly time consuming and expensive task, the spot is generally scanned across the target’s surface. A typical pulsed laser deposition configuration has a moving mirror that scans the laser beam across a rotating target. We propose ablating the target with a spiral pattern to ensure a uniform ablation and maximizing the target’s efficiency. This requires moving the mirror and target in sync with variable speeds. To this end, we designed and built robust electromechanical actuators driven by stepper motors, which are electronically controlled by an Arduino-based system. The core of the firmware is a precalculated lookup table with the time intervals between the motors’ steps. Thus, motor control following computationally expensive positioning functions -as the spiral pattern- are not a problem. Users may operate the control system through a user-friendly interface. The modular firmware architecture facilitates future extensions as, for example, adding other motor positioning functions to enable different ablation patterns for research purposes. This development aims to be a valuable tool for the synthesis of thin films by pulsed laser deposition.
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