Development of Method Enhanced Laser Ablation Efficiency According to Fine Curvature of the Polymer through the Preliminary Preparation Process Using UV Picosecond Laser

In processes using the ultrashort pulsed laser, the phenomenon that the ablation efficiency is reduced due to the increase of the shielding effect of the generated plume is increasingly caused by the use of the high power and high repetition rate. A new method is needed to prevent a decrease in ablation efficiency in processing using an ultrashort pulsed laser. In this study, the proposed a processing method that can improve the ablation efficiency by providing an efficient escape path of plume, and examine the feasibility of a new processing method. The new method we proposed is a method of laser processing after generating a fine curvature in the polymer as a preliminary preparation. The fine curvature of the polymer produced by the preliminary preparation induces an artificial chimney-like opening along the path of the incident beam during laser processing, thereby enabling the plume to be effectively removed. The experiment for examine the feasibility through a new method was conducted using a 10-picosecond laser of UV wavelength with two optical systems. As a new processing method, when processing with ultrashort pulse laser, it was observed that the ablation efficiency improved.

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Short and Ultrashort Pulsed Laser Processing of Zinc: Resolidification Morphology of Ablated Craters

Journal of Laser Micro/Nanoengineering ◽

10.2961/jlmn.2018.03.0006 ◽

2018 ◽

Cited By ~ 2

Keyword(s):

Laser Processing ◽

Pulsed Laser ◽

Pulsed Laser Processing ◽

Ultrashort Pulsed Laser

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High-precision ultrashort pulsed laser processing of metal foils using an advanced multibeam optic

Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXV ◽

10.1117/12.2551994 ◽

2020 ◽

Author(s):

Thilo Barthels ◽

Markus Niessen ◽

Martin Reininghaus ◽

You Wang

Keyword(s):

High Precision ◽

Laser Processing ◽

Pulsed Laser ◽

Metal Foils ◽

Pulsed Laser Processing ◽

Ultrashort Pulsed Laser

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Direct Laser Processing of Two-Scale Periodic Structures for Superhydrophobic Surfaces Using a Nanosecond Pulsed Laser

Lasers in Manufacturing and Materials Processing ◽

10.1007/s40516-020-00130-2 ◽

2020 ◽

Vol 7 (4) ◽

pp. 496-512 ◽

Cited By ~ 1

Author(s):

Hidenori Shimada ◽

Shunichi Kato ◽

Takumi Watanabe ◽

Masaki Yamaguchi

Keyword(s):

Contact Angle ◽

Laser Processing ◽

Periodic Structures ◽

Pulsed Laser ◽

Processing Method ◽

Superhydrophobic Surfaces ◽

Processing Rate ◽

Nanosecond Pulsed Laser ◽

Direct Laser ◽

Micro Holes

AbstractHierarchical structures are promising geometries for superhydrophobic surfaces, however a processing method with a single laser light source that is capable of both one-pass and rapid processing has not been established. The purpose of this study was to propose a concept of direct laser processing of two-scale periodic structures exhibiting superhydrophobicity. We hypothesized that the molten material that occurs due to the expanding plasma and that is squeezed around the micro-holes could play an active role in the processing of two-scale periodic structures. Percussion drilling using a nanosecond pulsed laser (532 nm wavelength) was performed on a steel surface. Twenty four different test-pieces were prepared using pitch (16–120 μm), number of repetition shots (1–120), and fluence (2.49–20 J/cm2), as the parameters. As the results, micro-holes with bank-shaped outer rims were formed. The maximum apparent contact angle was 161.4° and the contact angle hysteresis was 4.2° for a pitch of 80 μm and 20 repetition shots. The calculated results for the apparent contact angles were consistent with the measured results. Finally, an equation for estimating the processing rate was proposed. We demonstrated that this direct processing method can achieve a maximum processing rate of 823 mm2/min.

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A New Method for Processing Ceramics with Cracked Glaze

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.418-420.63 ◽

2011 ◽

Vol 418-420 ◽

pp. 63-66

Author(s):

Ji Wei Fan ◽

Xiao Peng Li ◽

Zhao Jun Zhang ◽

Wang Xi Zhang ◽

Zhi Qiang Jiao ◽

...

Keyword(s):

Laser Processing ◽

Ceramic Materials ◽

Processing Parameters ◽

Processing Method ◽

New Method ◽

Ceramic Surface ◽

Laser Technique

Laser processing ceramic materials is a new application of laser technique. This paper presents the study of making cracked glaze surface by laser processing. Proposed the applicable the composition of glaze, the main processing parameters of laser processing, and discussed the factors which may affect the quality of cracked glazing surface. It indicates that laser processing could be a new and easy processing method to produce the cracked glazing on the ceramic surface.

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