- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
[Laser Institute of America ICALEO?? 2014: 33rd International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing - San Diego, California, USA (October 19a??23, 2014)] International Congress on Applications of Lasers & Electro-Optics - Towards the production of glass based printed circuit boards
摘要： This study analyzes laser processing of glass-based printed circuit boards which have the capability to replace conventional substrate materials when electronics are required to operate at elevated temperatures. There is significant potential for glass-based circuit boards within the field of aerospace and electric mobility. The new circuit board concept consists of thin copper-coated borosilicate glass with thicknesses ranging from 150 μm to 500 μm. Conventional mechanical processing of this new circuit boards induces stress on the thin glass which can lead to damage of the substrate. Therefore, laser processing with a picosecond laser source is suggested as a tool within the production process of the new circuit boards. Two necessary processes are investigated using a pulsed picosecond laser with a pulse duration of 7 ps at a wavelength of 515 nm. Precise drill-holes for vertical connections of multilayer boards were produced where chipping at the cutting edge must be avoided. Selective ablation of the copper coating was performed to generate the electrical circuits. The results show that a well-defined ablation process is crucial to achieve adequate electrical isolation without damaging the glass substrate. The study also underlines the huge potential of laser processing with picosecond laser sources, which have proven to be a versatile instrument to drill thin glass and generate electrical circuits by selective ablation.
关键词： copper ablation,picosecond laser,laser processing,borosilicate glass,glass-based printed circuit boards
更新于2025-09-16 10:30:52
-
Effect of Te-based glass on contact formation and electrical properties in Si solar cells
摘要： Numerous studies have focused on applying Te-based glass in crystalline Si solar cells due to their low thermal properties and high chemical resistance. However, the correlation between Te-based glass and contact formation in these solar cells has not been addressed. In this study, we investigated the relationship between the thermal properties of glass frits and the content of the TeO2/(TeO2tPbO) ratio under fast ?ring. Subsequently, the effect of the contact formation on the electrical characteristics of Si solar cells with Te-based glass frits in Ag paste was observed. The thermal properties of the glass frits and the contact formation between the Ag electrodes and Si wafer were observed. The results showed that the morphology of the interfacial structure signi?cantly affected the electrical properties. The thickness of the glass layer was proportional to the series resistance of the Si solar cells. The lower viscosity of the emitter and the glass frits was due to the formation of a higher amount of recrystallites on the n and the penetration depth of the recrystallites into Si, which resulted in a higher ef?ciency. It was apparent that the contact formation between the Ag electrodes and the Si wafer was caused by the fused glass frits in Ag paste under fast ?ring.
关键词： Glass frit,Ag paste,Si solar cell,Te-based glass,Ag electrode
更新于2025-09-16 10:30:52
-
Designing composition tuned glasses with enhanced properties for use as substrate in Cu2ZnSnS4 based thin film solar cells
摘要： Glass substrate constituents play a very important role in CuInGaSe2/Cu2ZnSnS4 thin film solar cell. The diffusion of Na from soda lime glass substrate (SLG) reportedly passivates the grain boundaries of the absorber layers that prevent recombinations of electrons & holes at the grain boundaries. Thus, glasses with various alkali metal oxides (Na/Li/K) have been synthesized and characterized using various experimental techniques to understand the structure-property correlation and its effect on the diffusion phenomenon. The as-prepared glasses for substrate are thermally and mechanically more stable, with better conductivity and higher diffusivity than commercially available soda lime glass (SLG). The present glasses exhibit suitable properties for use as substrate for thin film solar cell.
关键词： Conductivity,Substrate,Solar cell,SLG,Glass
更新于2025-09-16 10:30:52
-
Red, green and blue phosphorescent organic light-emitting diodes with ITO-free anode material
摘要： The non-productive hole-current from blue, green and red phosphorescent OLEDs was reduced by employing silver nanoparticles embedded glass:Ni-Ag-codoped ZnO (SNSZO) anode and enhanced the efficiencies. The blue device using SNSZO: Ir(fdbdi)3 exhibit maximum luminance (L) of 42683 cd/m2, current efficiency (ηc) of 43.6 cd/A and power efficiency (ηp) of 45.3 lm W-1 with external quantum efficiency (ηex) of 20.2 % than ITO: Ir(fdbdi)3 based device [L- 35126 cd/m2; ηc - 38.4 cd/A; ηp - 37.3 lm w-1; ηex -15.1 %]. The green device with SNSZO: Ir(mnmpdi)2(acac) show intensified emission at 520 nm and exhibit higher efficiency; L - 47238 cd/m2, ηc -50.9 cd/A, ηp - 49.3 lm w-1 and ηex - 18.9 % [ITO: Ir(mnmpdi)2(acac): L- 39326 cd/m2; ηc-46.0 cd/A; ηp -39.3 lm w-1; ηex -13.8 %]. The red device (620 nm) with SNSZO: Ir(mnpbi)2(acac) show L - 9058 cd/m2, ηc - 8.3 cd/A, ηp -6.4 lm w-1 and ηex - 12.2 % [ITO: Ir(mnpbi)2(acac): L- 7632 cd/m2; ηc -4.1 cd/A; ηp -6.40 lm w-1; ηex -6.0 %]. The proposed OLEDs with SNSZO anode shows excellent efficiencies than ITO and providing alternate for high-performance OLEDs and other optoelectronic devices.
关键词： maximum efficiencies,Glass: Ni-Ag-codoped ZnO interface,surface Plasmon.,anode material
更新于2025-09-16 10:30:52
-
[IEEE 2019 International Conference on Electronics Packaging (ICEP) - Niigata, Japan (2019.4.17-2019.4.20)] 2019 International Conference on Electronics Packaging (ICEP) - High-speed High-density Cost-effective Cu-filled Through-Glass-Via Channel for Heterogeneous Chip Integration
摘要： A topside Cu-filled through-glass via ("Cu bridge") is presented as a novel transmission channel. The simulated signal transmission loss of the Cu bridge was as low as 0.04 dB at a signal frequency of 18 GHz, corresponding to the PCI Express 5.0 bus standard. Its signal transmission loss was less than 0.13 % in a typical long-reach SerDes channel with a loss of 30 dB. The minimum pitch of the Cu bridge was as narrow as 100 μm, which meets the requirements for increased signal I/O. The simple few-step fabrication of the Cu bridge effectively reduces the cost of manufacturing glass interposers. This is a great advantage compared to silicon interposers, which require a complicated process to fabricate Cu through-silicon vias. A glass substrate semi-additive and embedded with Cu bridges supports damascene-based redistribution layers, which increases the number of potential packaging configurations. This Cu bridge is thus a promising approach to next-generation heterogeneous integration based on 2.nD interposers.
关键词： Interposer,TSV,2.nD,TGV,Redistribution layer,Heterogeneous integration,2.5D,Semi-additive process,2.1D,Damascene,RDL,Through-glass via,Through-silicon via
更新于2025-09-16 10:30:52
-
On the Mechanism of Absorption and Restoration of Radiation Transmission in the Channel of Small-Scale Self-Focusing of a Short Laser Pulse in Neodymium Glass
摘要： When diagnosing a small-scale self-focusing (SSSF) channel of a 0.5-ns laser pulse with an intensity of 3–5 GW/cm2 in neodymium glasses, an absorption jump was detected (with a front of ≈0.5 ns) at wavelengths of 1.06 and 0.66 μ m in addition to filament-like damage typical of SSSF, spectral broadening, and laser radiation scattering. The absorption coefficient reached 0.15 cm–1, and transmission in the medium was restored during 15–35 ns for phosphate glass and 5–10 ns for silicate glass. The physical bases of this effect of the appearance and relaxation of absorption in glasses have not been previously presented. An analysis of the experimental data showed that the absorption jump is due to the fast population of the 4I11/2 level of Nd3+ ions in glasses when nonlinear processes occur in the SSSF channel such as stimulated Raman scattering and broadening of the laser pulse spectrum. The relaxation time of the population at the 4I11/2 level and the restoration of transmission in glasses after the termination of the laser pulse are determined by the characteristic sizes of the Nd3+ ions excitation regions arising in the samples upon interference of the laser and scattered radiation, as well as the thermophysical characteristics of the glasses.
关键词： self-focusing,neodymium glass,powerful laser pulse,induced absorption
更新于2025-09-16 10:30:52
-
Enhancement mechanisms of Tm3+-codoping on 2?μm emission in Ho3+ doped fluoroindate glasses under 888?nm laser excitation
摘要： Ho3+ doped and Ho3+/Tm3+ co-doped fluoroindate glass samples were prepared and their emission properties were compared. Under 888 nm laser excitation, the emission at 2 μm of Ho3+ ions with co-doping 2 mol% Tm3+ ions had a 2.9-fold improvement compared with that of Ho3+ doped. The absorption and emission spectra, and energy level lifetime of Ho3+/Tm3+ co-doped glass samples were measured to analyze the energy transfer processes and enhancement mechanisms. The luminescence intensity at 2 μm can be greatly increased due to the bidirectional energy transfer between Tm3+ and Ho3+ ions.
关键词： Luminescence,Mid-infrared,Ho3+/Tm3+ co-doped,Fluoroindate glass
更新于2025-09-16 10:30:52
-
[Laser Institute of America ICALEO? 2017: 36th International Congress on Applications of Lasers & Electro-Optics - Atlanta, Georgia, USA (October 22–26, 2017)] International Congress on Applications of Lasers & Electro-Optics - Adaptive optics for intra-volume engraving of glass with ultra-short laser pulses
摘要： Within the frame of high precision ultrafast laser processing of transparent materials, we report here on the use of adaptive optics as a tool for intra-volume laser engraving of glass. With the active monitoring of the laser beam wavefront, the repartition of the above-threshold energy in the focal volume is actively detected. Therefore, the elongation of the laser-induced modification due to longitudinal spherical aberration can be minimized or emphasized on demand. Indeed, the industrial adaptive optics set up, made of a wavefront sensor and a deformable mirror, permits the management of each wavefront aberration as RMS values of chosen Zernike polynomials coefficients. This technique allows the control of the processing of transparent dielectrics, whatever the index of refraction and the depth are. This study addresses the precise correlation between wavefront distortions and intra-volume modifications in borosilicate glass obtained with a 300 fs Yb-doped fiber laser running at 1030 nm. The effects of the 3rd and 5th orders of longitudinal spherical aberrations on the laser-induced marking of the bulk are investigated with the purpose of precisely controlling the length of the interaction volume in the illuminated dielectric material. We show here a minimization of the total length of the marking by 65% at 600 μm in depth, from the natural wavefront to the optimized one, close to the diffraction limit.
关键词： wavefront distortions,ultra-short laser pulses,intra-volume engraving,adaptive optics,glass,longitudinal spherical aberrations
更新于2025-09-16 10:30:52
-
Microchannel Fabrication in Fused Quartz by Backside Laser-Induced Plasma Ablation Using 248 nm KrF Excimer Laser
摘要： Laser-induced plasma ablation (LIPA) using a 248 nm KrF excimer laser was investigated for microchannel fabrication. Examination of the morphology in relation to ablation performance was emphasized, and a synthetic LIPA mechanism model was proposed based on the results. Backside LIPA with a metal target on the bottom can be attributed to a combination of two phenomena: laser-induced plasma vaporization thermal ablation from the metal target below and enhanced laser–glass direct interaction from the plasma residuum. The laser absorption enhancement of quartz substrate resulting from the metal residuum was validated clearly using absorption spectrum measurements. The influence of laser parameters on the etching quality during LIPA was also analyzed for processing optimization. Finally, fused quartz glass microchannels of outstanding surface quality and dimension uniformity were implemented. The channel depth was 28 μm, and the bottom surface roughness was better than several hundred nanometers.
关键词： excimer laser,plasma,fused quartz glass,laser ablation,microstructure
更新于2025-09-16 10:30:52
-
Numerical investigation on He and Ar gas convective cooling for optical fiber glass drawing at short draw towers
摘要： The inert purge gas plays an important role in mass manufacturing of optical fibers, as it is usually the mixture gas of helium and argon. The natural and forced convective effects of purge gas are numerically investigated through the process simulation of glass fiber drawing in a short draw tower furnace by employing an iterative computational scheme of neck-down prediction formulation and computational fluid dynamics simulation of purge gas flow. The furnace geometric model and process conditions are based on realistic manufacturing process. It is found that neck-down shape and draw tension are quite insensitive to change of gas flow rate and helium contents level. In contrast, the recirculatory flow pattern around preform neck-down region is observed when helium contents are low, suggesting the difficulty in flushing of contamination particles out of furnace system. The increase of helium contents combined with increased flow rate in purge gas mixture could completely remove such undesirable flow patterns.
关键词： Optical fiber manufacturing,Draw tower,Numerical model,Convection,Glass fiber drawing
更新于2025-09-16 10:30:52