Multibeam Healing for Laser Micromachining in Manufacturing

制造业激光微加工的多光束修复

• 批准号: 7109099
• 负责人: BIPIN SINGH
• 金额: $ 9.91万
• 依托单位: RADIATION MONITORING DEVICES, INC.
• 依托单位国家: 美国
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-05-01 至 2008-04-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7109099
• 关键词: lasers

DESCRIPTION (provided by applicant): There is a considerable interest in using laser-manufacturing methods for medical applications due to their potential to reduce cost. In fact, the precision and low-force signature of lasers makes them very attractive alternatives to traditional machining methods for brittle materials such as lutetium oxyorthosilicate (LSO) and gadolinium oxyorthosilciate (GSO) used in high-resolution medical imaging. However, material damage, especially micro-scale cracking, during laser machining is a frequently encountered problem that results in added costs, needless scrap, and reduced performance/reliability. We propose to demonstrate the feasibility of developing a multibeam laser healing technique to eliminate micro-cracks formed during laser machining of brittle materials like scintillators. We will use a simultaneous multibeam approach for micromachining and defect healing to improve the strength/reliability during laser manufacturing. Experimental investigations will be supported by finite-element modeling of the process including the calculation of damage inducing thermal-stresses. The proposed research on laser healing will significantly improve both yield and reliability during laser machining, resulting in an order of magnitude reduction in cost. Additionally, the reduced inter-pixel gaps resulting from the laser pixelation technique will significantly improve detector performance. Therefore, the proposed research has great commercial relevance, especially for high-resolution medical imaging applications.

描述（由申请人提供）：由于激光制造方法具有降低成本的潜力，因此人们对将激光制造方法用于医疗应用产生了很大的兴趣。事实上，激光的精确性和低力特征使其成为脆性材料（例如用于高分辨率医学成像的氧原硅酸镥 (LSO) 和氧原硅酸钆 (GSO)）的传统加工方法的非常有吸引力的替代方案。然而，激光加工过程中的材料损坏，尤其是微尺度裂纹是经常遇到的问题，会导致成本增加、不必要的报废以及性能/可靠性降低。我们建议证明开发多束激光修复技术的可行性，以消除闪烁体等脆性材料激光加工过程中形成的微裂纹。我们将使用同步多光束方法进行微加工和缺陷修复，以提高激光制造过程中的强度/可靠性。实验研究将得到过程的有限元建模的支持，包括引起热应力的损伤的计算。拟议的激光修复研究将显着提高激光加工过程中的产量和可靠性，从而使成本降低一个数量级。此外，激光像素化技术减少的像素间间隙将显着提高探测器的性能。因此，所提出的研究具有很大的商业意义，特别是对于高分辨率医学成像应用。