Study the Formation Process of Cuboid Microprotrusion by Glass Molding Process †

Wang, Tao; Zhou, Tianfeng; Chen, Jing; Song, Libin

doi:10.3390/mi8030066

Cited by 12 publications

(11 citation statements)

References 18 publications

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“…Hot embossing is an efficient technique to fabricate glass microstructures. Wang [ 19 ] fabricated glass microstructures using hot embossing, and the glass molding process of cuboid micro protrusions was investigated. The experimental procedure for hot embossing of micro-lens array was conducted using an ultra-precision injection molding machine (PFLF7-60A) (SYS Co., Ltd., Osaka, Japan).…”

Section: Resultsmentioning

confidence: 99%

Fabrication of a Micro-Lens Array Mold by Micro Ball End-Milling and Its Hot Embossing

et al. 2018

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Hot embossing is an efficient technique for manufacturing high-quality micro-lens arrays. The machining quality is significant for hot embossing the micro-lens array mold. This study investigates the effects of micro ball end-milling on the machining quality of AISI H13 tool steel used in the micro-lens array mold. The micro ball end-milling experiments were performed under different machining strategies, and the surface roughness and scallop height of the machined micro-lens array mold are measured. The experimental results showed that a three-dimensional (3D) offset spiral strategy could achieve a higher machining quality in comparison with other strategies assessed in this study. Moreover, the 3D offset spiral strategy is more appropriate for machining the micro-lens array mold. With an increase of the cutting speed and feed rate, the surface roughness of the micro-lens array mold slightly increases, while a small step-over can greatly reduce the surface roughness. In addition, a hot embossing experiment was undertaken, and the obtained results indicated higher-quality production of the micro-lens array mold by the 3D offset spiral strategy.

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Section: Resultsmentioning

confidence: 99%

Fabrication of a Micro-Lens Array Mold by Micro Ball End-Milling and Its Hot Embossing

et al. 2018

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“…After an adequate amount of time, the injected material forms a frozen layer into the mould shape and is ejected, thereby completing the cycle. Wang et al [ 171 ] fabricated rectangular cross‐sectional microwells by using the glass injection moulding process. Large‐scale fabrication of microwells using injection moulding can be done by overcoming the geometrical design limitations to ensure smooth demouldability.…”

Section: Microwell Fabrication Methodsmentioning

confidence: 99%

“…Schematic illustration of microwells formation using injection moulding: A, B, SU‐8 mould with a designed patterned is used to attain desired feature on a coated nickel layer by UV photolithography. Cavities formed for self‐alignment after removing SU‐8 layers with top and bottom side; and C, illustration of the top and bottom side of mould insertion with desired microwell features on moulded substrates [ 171 ] …”

Section: Microwell Fabrication Methodsmentioning

confidence: 99%

“…Schematic illustration of microwells formation using injection moulding: A, B, SU-8 mould with a designed patterned is used to attain desired feature on a coated nickel layer by UV photolithography. Cavities formed for self-alignment after removing SU-8 layers with top and bottom side; and C, illustration of the top and bottom side of mould insertion with desired microwell features on moulded substrates [171] F I G U R E 5 Illustration of: A, wet chemical etching; and B, dry etching on glass surface. The mask defined layer is added onto the top of the glass composite material followed by a chemical etchant (buffered HF for wet etching and CF 4 for dry etching), which selectively etches the glass and forms the desired microwells [157,160]…”

Section: Cad Patternmentioning

confidence: 99%

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A review on microwell and microfluidic geometric array fabrication techniques and its potential applications in cellular studies

2020

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The ability to trap precise quantities of cells or particles into confined areas has numerous applications for biological purposes. In particular, single cell trapping has received considerable attention because it permits the study of heterogeneity in a population, while trapping larger groups of cells have been used to form aggregates. Among several methods, the use of microwell offers a simple platform to capture cells or particles using hydrodynamic forces. This review examines the use of microwells in both static and microfluidic environments, and the application of microfluidic geometric arrays for trapping. This paper discusses the design and fabrication methods of microwells and compares the trapping and release techniques used in both static and microfluidicsintegrated microwells. Finally, we will summarize novel microfluidic geometric arrays used to capture cells or particles through hydrodynamic trapping.

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“…In addition to typical optical glass elements with smooth surfaces such as spherical, aspherical, and free‐form lens, scores of surface‐relief microptical elements with micro‐V‐groove, microwell,, or microcuboid arrays are receiving increasing interest worldwide. Typically, diffractive optical elements (DOEs) with micro‐V‐grooves could yield excellent imaging characteristics and high diffractive efficiency .…”

Section: Introductionmentioning

confidence: 99%

Mechanism study on microformability of optical glass in ultrasonic‐assisted molding process

Luo

Nguyen

et al. 2018

Int J of Appl Glass Sci

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Ultrasonic‐assisted glass molding process (UGMP) has gained a promising start in microptics fabrication in recent years. To further understand the microforming process and comprehensively evaluate the microformability of the glass in UGMP, theoretical considerations and numerical simulations are performed in this study. A generalized dynamic viscoelastic model of glass in UGMP is first reformulated based on the ultrasonic thermo‐mechanical effects. Correspondingly, a multiphysics numerical model of UGMP is developed to dynamically observe the thermo‐mechanical rheological behaviors of the L‐BAL42 glass inside the microscale mold cavities. The stress distributions and deformation features of the formed micro‐V‐grooves in different molding processes are further employed to fully investigate the ultrasonic mechanical and thermal effects on glass molding. The results show that, as a product of the combined ultrasonic mechanical and thermal effects, the filling rate of the glass in UGMP is observably increased and homogenized, while its maximum forming stress is reduced by 57.6% compared with the conventional molding process (GMP). It is also found that, the ultrasonic thermal effect is dominant in lowering the forming stress of the glass, while the ultrasonic mechanical effect plays a leading role in homogenizing the filling rate of the glass. This study will provide both theoretical and technical supports for high‐efficiency and high‐precision fabrication of surface‐relief microptical elements.

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Study the Formation Process of Cuboid Microprotrusion by Glass Molding Process †

Cited by 12 publications

References 18 publications

Fabrication of a Micro-Lens Array Mold by Micro Ball End-Milling and Its Hot Embossing

Fabrication of a Micro-Lens Array Mold by Micro Ball End-Milling and Its Hot Embossing

A review on microwell and microfluidic geometric array fabrication techniques and its potential applications in cellular studies

Mechanism study on microformability of optical glass in ultrasonic‐assisted molding process

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