Overview of Micro-manufacturing

Qin, Yi

doi:10.1016/b978-0-323-31149-6.00001-3

Cited by 33 publications

(28 citation statements)

References 67 publications

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“…The technique is then referred as electrochemical polishing. The quality of the resulting surface is depending severely on the type of the electrolyte and the workpiece material and can reach optical quality [100]. Using a modified ECM process, Kurita and Hattori achieved a surface roughness of 0.06 µm [101].…”

Section: Form-giving Technologiesmentioning

confidence: 99%

Review on Fabrication Technologies for Optical Mold Inserts

2019

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Polymer optics have gained increasing importance in recent years. With advancing requirements for the optical components, the fabrication process remains a challenge. In particular, the fabrication of the mold inserts for the replication process is crucial for obtaining high-quality optical components. This review focuses on fabrication technologies for optical mold inserts. Thereby, two main types of technologies can be distinguished: fabrication methods to create mold inserts with optical surface quality and methods to create optical microstructures. Since optical mold inserts usually require outstanding form accuracies and surface qualities, a focus is placed on these factors. This review aims to give an overview of available methods as well as support the selection process when a fabrication technology is needed for a defined application. Furthermore, references are given to detailed descriptions of each technology if a deeper understanding of the processes is required.

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Section: Form-giving Technologiesmentioning

confidence: 99%

Review on Fabrication Technologies for Optical Mold Inserts

2019

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“…To meet this demand for multi-material micromanufacturing, it is essential for continuous improvement in micro- and nanofabrication technologies. 2 There exists a broad range of microfabrication technologies each having its own capabilities, applications and limitations. Numerous classification systems are used to classify microfabrication techniques.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of binding copper powders by electrochemical deposition

Kumar

Sundaram

2015

Proceedings of the Institution of Mechanical Engineers, Part B:

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Binding of metal powders using electrochemically deposited binders provides a novel approach to achieve metal additive manufacturing at ambient temperature. In this study, using an in-house built experimental setup, a single layer of copper powders were electrochemically bound together with the help of nickel binder and the deposits were studied by scanning electron microscope and energy-dispersive X-ray spectroscopy. Mechanical characterization performed on the deposits reveals that the yield strength of the deposit is comparable to that of laser-sintered parts made from Cu/Ni powder. Furthermore, Taguchi studies have been conducted to investigate the optimal process parameters required for minimum diameter of electrochemically bound spot, layer thickness and yield strength. Analysis of variance and signal-tonoise ratio were used to determine the important levels of process parameters and the results were then experimentally verified.

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“…Manufacturing processes such as lEDM, micro-milling or laser ablation are established techniques in this field, but suffer from high cost, tool wear or induced thermal stress, respectively [1,12]. Laser chemical machining (LCM) is a promising alternative process that allows for inexpensive manufacturing of microstructures in hard metals, such as dies for microforming [18], without heat damage or structural alterations to the material [2].…”

Section: Motivationmentioning

confidence: 99%

Geometry Measurement of Submerged Metallic Micro-Parts Using Confocal Fluorescence Microscopy

et al. 2018

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The in situ geometry measurement of microstructures in the laser chemical machining (LCM) manufacturing process places high demands on measurement systems because the specimen is submerged in a closed fluid circuit. The steep slopes of the manufactured micro-components and the general lack of accessibility hinder the use of standard techniques such as tactile measurement or conventional confocal microscopy. A technique based on confocal fluorescence microscopy shows promise for increasing the measurability on metallic surfaces with large curvatures. By applying an intensely scattering fluorescent coating to the specimen, the surface position can be determined by the change in fluorescence signal at the boundary between specimen and coating. In contrast to the currently tested thin coatings (\100 lm) the measurements in layers thicker than 1 mm, as required for in situ application at the LCM process, show distinct dependencies on the fluorescent medium in terms of concentration and index of refraction. Hence, a fundamentally different signal evaluation approach based on a physical model of the fluorescence signal is needed to extract the surface position information from the detected fluorescence intensity signal. For the purpose of validation, the measurement of a step geometry is performed under the condition of a thick fluid layer and referenced with a tactile measurement. As a result, the model-based approach is shown to be suitable to detect the geometry parameter step height with an uncertainty of 8:8 lm for a step submerged in a fluid layer with a thickness of 2:3 mm.

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Overview of Micro-manufacturing

Cited by 33 publications

References 67 publications

Review on Fabrication Technologies for Optical Mold Inserts

Review on Fabrication Technologies for Optical Mold Inserts

Experimental study of binding copper powders by electrochemical deposition

Geometry Measurement of Submerged Metallic Micro-Parts Using Confocal Fluorescence Microscopy

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