The Mixed Processing Models Development Of Thermal Fracture And Laser Ablation On Glass Substrate

2011 ◽  
Author(s):  
Kuo-Cheng Huang ◽  
Wen-Hong Wu ◽  
Shih-Feng Tseng ◽  
Chi-Hung Hwang ◽  
Francisco Chinesta ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Glass Substrate ◽  
Thermal Fracture

The laser ablation model development of glass substrate cutting assisted with the thermal fracture and ultrasonic mechanisms

2015 ◽  
Vol 67 ◽  
pp. 31-35 ◽  
Author(s):  
Kuo-Cheng Huang ◽  
Wen-Tse Hsiao ◽  
Chi-Hung Hwang ◽  
Ru-Li Lin ◽  
Jer-Liang Andrew Yeh
Keyword(s):  
Laser Ablation ◽  
Glass Substrate ◽  
Model Development ◽  
Thermal Fracture ◽  
Ablation Model

MAGNETIC CHARACTERIZATION OF WEB-LIKE CARBON NANOTUBES CATALYZED BY Fe2O3 VIA PULSED LASER ABLATION DEPOSITION (PLAD) TECHNIQUE

2011 ◽  
Vol 10 (03) ◽  
pp. 403-412 ◽  
Author(s):  
ISMAYADI ISMAIL ◽  
MANSOR HASHIM ◽  
NOORHANA YAHYA
Keyword(s):  
Carbon Nanotubes ◽  
Electron Microscope ◽  
Laser Ablation ◽  
Glass Substrate ◽  
Vibrating Sample Magnetometer ◽  
Graphite Target ◽  
X Ray ◽  
Transmission Electron ◽  
532 Nm

Web-like carbon nanotubes were synthesized via Laser Ablation Deposition (PLAD) in a T-shape stainless steel chamber. An Nd -YAG laser with a 532 nm wavelength was used to irradiate a target of graphite and a catalyst, with a 5–7 ns pulsed width. Fe2O3 was used as a catalyst to produce a reactive graphite target. The vacuum level was kept at 5 Torr with argon gas flowing from the bottom of the chamber. The plume that was deposited on a glass substrate was then characterized using a Scanning Electron Microscope (SEM), Energy Dispersive X-ray (EDX) analysis, a Transmission Electron Microscope (TEM), and a Vibrating Sample Magnetometer (VSM). Web-like CNT structures were deposited on the glass substrate. These web-like structures were randomly aligned with sizes of 99 nm to 234 nm. TEM images confirmed that these web-like structures were CNTs. VSM results showed that the encapsulation of the Fe2O3 catalyst had influenced the magnetic properties of the CNTs. The magnetic property of CNTs was increased with the increasing amount of the Fe2O3 catalyst filling the CNTs. We assert that the starting catalyst material was transformed from hematite to magnetite via maghemite by a structural change under a reduced oxygen atmosphere during the laser ablation.

Real-Time Monitoring of Indium Tin Oxide Laser Ablation in Liquid Crystal Display Patterning

1998 ◽  
Vol 526 ◽  
Author(s):  
M.H. Hong ◽  
Y.F. Lu ◽  
M. Meng ◽  
T.S. Low
Keyword(s):  
Laser Ablation ◽  
Acoustic Wave ◽  
Laser Fluence ◽  
Indium Tin Oxide ◽  
Glass Substrate ◽  
Ablation Threshold ◽  
Liquid Crystal Display ◽  
Pulse Number ◽  
Spectral Lines ◽  
Spectral Intensities

AbstractAudible acoustic wave detection is applied to investigate KrF excimer laser ablation of Indium Tin Oxide (ITO) thin film layer for Liquid Crystal Display (LCD) patterning. It is found that there is no acoustic wave generation if laser fluence is lower than ITO ablation threshold. For laser fluence higher than the threshold, audible acoustic wave will be detected due to shock wave generation during ITO laser ablation. The amplitude of the acoustic wave is closely related to the laser ablation rate. With more laser pulse applied, the amplitude is dropped to zero because the ITO layer is completely removed. However, if laser fluence is increased higher than ablation threshold for glass substrate, the amplitude is also dropped with pulse number but not to zero. It is due to laser ablation of ITO layer and glass substrate at the same time. Since the thickness of ITO layer is in a scale of 100 nm, laser interaction with glass substrate will happen even at the first pulse of high laser fluence irradiation. Laser ablation induced ITO plasma emission spectrum in visible light region is analyzed by an Optical Multi-channel Analyzer (OMA). Specific spectral lines are In I (325.8, 410.2 and 451.1 nm) and In II 591.1 nm. Spectral intensities of 410.2 and 451.1 nm lines are selected to characterize the evolution of ITO plasma intensity with laser fluence and pulse number. It is found that the spectral intensities are reduced to zero with laser pulse number. It is also found that spectral lines other than ITO plasma will appear for laser fluence higher than ablation threshold for glass substrate. Threshold fluences for glass and ITO ablation are estimated for setting up a parameter window to control LCD patterning in real-time.

A Study on Thermal Fracture Processing Models Applied to Glass Substrate Cutting

2011 ◽  
Vol 264-265 ◽  
pp. 1252-1257 ◽  
Author(s):  
Kuo Cheng Huang ◽  
Min Wei Hung ◽  
Shih Feng Tseng ◽  
Chi Hung Hwang
Keyword(s):  
Fracture Mechanics ◽  
Weight Function ◽  
Glass Substrate ◽  
Thermal Stresses ◽  
Local Buckling ◽  
Brittle Materials ◽  
Mode I ◽  
Mode Ii ◽  
Thermal Fracture ◽  
Mode Ii Fracture

Thermal fracture-cutting technology (TFCT) for brittle materials has become the main technology for LCD glass substrate cutting to meet the low residual thermal stresses requirement. Based on the thermal weight function principle of fracture mechanics, this paper presents thermal weight function distributions for the mode-I and mode-II fracture model, and the fracture phenomenon under a variety of cutting paths, such as tilt crack, split crack, twist crack, and local buckling.

Multi-Sphere Mirror Design of YAG Laser Applied for Glass Substrate Cutting

2011 ◽  
Vol 264-265 ◽  
pp. 1246-1251
Author(s):  
Wen Hong Wu ◽  
Kuo Cheng Huang ◽  
Shih Feng Tseng
Keyword(s):  
Energy Distribution ◽  
Glass Substrate ◽  
Laser Energy ◽  
Cutting Speed ◽  
Thermal Fracture ◽  
Sphere Surface ◽  
Reflective Mirror ◽  
Proper Design ◽  
Simulation Results ◽  
The Ideal

A thermal fracture process applied to the brittle materials has become a foremost technology, and applied to cut the LCD glass substrate. One advantage of this process is that the cross-section of cut glass substrate will be smooth with low residual stress after thermal fracture processing. The multi-sphere mirror aims to repeatedly reflect the light energy within upper and lower mirror in order to enhance the laser beam absorption rate of glass under cutting. Moreover, with a proper design of multi-sphere mirror, the energy distribution of applied laser can provide an ideal thermal fracture condition to improve cutting speed of glass substrate. A novel reflective mirror with multi-sphere surface was developed and reported to transform the regular laser energy distribution toward the ideal one. Furthermore, the shape of multi-sphere mirror is optimized by Taguchi method so as to meet the surface requirement that can get the ideal energy distribution. This paper presents a series of simulation results and analysis results of multi-sphere mirror calculated by the TracePro opto-mechanical software.

scholarly journals Reconfigurable and Permanent Wetting Patterns on Polymer Surfaces Obtained Using Plasma Oxidation and Laser Ablation

2018 ◽  
Vol 4 (1) ◽  
pp. 22-29 ◽  
Author(s):  
A. Kiraz ◽  
Z. Rashid ◽  
B. Morova ◽  
Ö. Yaman ◽  
S. Soydan ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Glass Substrate ◽  
Microfluidic Channel ◽  
Surface Oxidation ◽  
Polymer Surfaces ◽  
Plasma Oxidation ◽  
Wetting Properties ◽  
Femtosecond Laser Micromachining ◽  
Smart Surfaces ◽  
Periodic Exposure

Abstract Smart surfaces with preferably reconfigurable wetting properties can lead to key applications in labon- a-chip analytical and preparative systems. In this paper, we present our recent results obtained using polymer surfaces whose wetting properties are modified in a permanent manner using laser ablation and in a reconfigurable manner using plasma oxidation. Polydimethylsiloxane (PDMS) diluted in solvent is used as the polymeric material coated over microscope glass slides in our studies. In the first part, the tracks of ~ 70 μm width are defined over the surface by surface oxidation using cold plasma exposure through a microfluidic channel. In the second part, femtosecond laser micromachining is used for selective removal of polymer coating and uncovering the hydrophilic glass substrate. We experimentally demonstrate guiding of water in the form of filaments and droplets over the obtained hydrophilic tracks of ~ 110 μm. We also discuss preliminary experiments to coat light sensitive azobenzene over a glass substrate with the help of a silane in order to achieve reversible isomerization upon periodic exposure to UV/vis radiation. Furthermore, we elaborate advantages, challenges and the significant role of such patterned surfaces in future applications.

Benzylamine Tartrate as an Organic Glass Substrate for Carbon Films by Evaporation

1970 ◽  
Vol 28 ◽  
pp. 484-485
Author(s):  
A. C. Faberge
Keyword(s):  
Vapor Pressure ◽  
Viscous Liquid ◽  
Glass Substrate ◽  
Room Temperature ◽  
Carbon Film ◽  
Carbon Films ◽  
Organic Glass ◽  
Spectroscopic Examination ◽  
Polymeric Substrates

Benzylamine tartrate (m.p. 63°C) seems to be a better and more convenient substrate for making carbon films than any of those previously proposed. Using it in the manner described, it is easy consistently to make batches of specimen grids as open as 200 mesh with no broken squares, and without individual handling of the grids. Benzylamine tartrate (hereafter called B.T.) is a viscous liquid when molten, which sets to a glass. Unlike polymeric substrates it does not swell before dissolving; such swelling of the substrate seems to be a principal cause of breakage of carbon film. Mass spectroscopic examination indicates a vapor pressure less than 10−9 Torr at room temperature.

Observations on the growth of YBa2Cu3O7-δ thin films on MgO by pulsed-laser ablation

1991 ◽  
Vol 49 ◽  
pp. 1068-1069
Author(s):  
M. Grant Norton ◽  
C. Barry Carter
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Laser Ablation ◽  
Substrate Surface ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Laser Ablation Process ◽  
Deposition Parameters

Pulsed-laser ablation has been widely used to produce high-quality thin films of YBa2Cu3O7-δ on a range of substrate materials. The nonequilibrium nature of the process allows congruent deposition of oxides with complex stoichiometrics. In the high power density regime produced by the UV excimer lasers the ablated species includes a mixture of neutral atoms, molecules and ions. All these species play an important role in thin-film deposition. However, changes in the deposition parameters have been shown to affect the microstructure of thin YBa2Cu3O7-δ films. The formation of metastable configurations is possible because at the low substrate temperatures used, only shortrange rearrangement on the substrate surface can occur. The parameters associated directly with the laser ablation process, those determining the nature of the process, e g. thermal or nonthermal volatilization, have been classified as ‘primary parameters'. Other parameters may also affect the microstructure of the thin film. In this paper, the effects of these ‘secondary parameters' on the microstructure of YBa2Cu3O7-δ films will be discussed. Examples of 'secondary parameters' include the substrate temperature and the oxygen partial pressure during deposition.

Sign in / Sign up

Export Citation Format

Share Document