Microscale additive manufacturing is one of the fastest growing areas of research within the additive manufacturing community. However, there are still significant challenges that exist in terms of available materials, resolution, throughput, and ability to fabricate true three-dimensional geometries. These challenges render commercialization of currently available microscale additive manufacturing processes difficult. This paper is the last one in a four-part series of articles which review the current state-of-the-art of microscale additive manufacturing technologies and investigate the factors that currently limit each microscale additive manufacturing technology in terms of materials, resolution, throughput, and ability to fabricate complex geometries. Parts I, II and III offer prognoses about the future viability and applications of each technology along with suggested future research directions that could be used to bring each process technology in line with its fundamental, physics-based limitations. This paper brings together the general design guidelines that must be followed while designing scalable microscale AM processes. Finally, the paper concludes with an analysis of the role of precision engineering in the future advancement of microscale additive manufacturing technologies. This series of publications is a joint effort by the members and affiliates of the Micro-Nano Technical Leadership Committee of the American Society for Precision Engineering (ASPE).

微型增材制造是增材制造领域内发展最快的领域之一。但是，在可用材料，分辨率，生产量以及制造真实三维几何形状的能力方面仍然存在重大挑战。这些挑战使得当前可用的微型增材制造工艺的商业化变得困难。本文是由四部分组成的系列文章中的最后一篇，该系列文章回顾了当前的微型增材制造技术的最新水平，并从材料，分辨率，产量方面研究了目前限制每种微型增材制造技术的因素。以及制造复杂几何图形的能力。第一部分 II和III提供了每种技术在未来的可行性和应用的预测，以及建议的未来研究方向，可用于使每种工艺技术符合其基本的，基于物理的局限性。本文汇总了设计可扩展的微型AM流程时必须遵循的一般设计准则。最后，本文最后分析了精密工程在微型增材制造技术的未来发展中的作用。该系列出版物是美国精密工程学会（ASPE）的微纳技术领导委员会的成员和附属机构的共同努力。基于物理的局限性。本文汇总了设计可扩展的微型AM流程时必须遵循的一般设计准则。最后，本文最后分析了精密工程在微型增材制造技术的未来发展中的作用。该系列出版物是美国精密工程学会（ASPE）的微纳技术领导委员会的成员和附属机构的共同努力。基于物理的局限性。本文汇总了设计可扩展的微型AM流程时必须遵循的一般设计准则。最后，本文最后分析了精密工程在微型增材制造技术的未来发展中的作用。该系列出版物是美国精密工程学会（ASPE）的微纳技术领导委员会的成员和附属机构的共同努力。