Single pulse energy capability and failure modes of n- and p-channel LDMOS with thick copper metallization

2010 ◽  
Vol 50 (9-11) ◽  
pp. 1347-1351 ◽  
Author(s):  
A. Podgaynaya ◽  
R. Rudolf ◽  
B. Elattari ◽  
D. Pogany ◽  
E. Gornik ◽  
...  
Keyword(s):  
Pulse Energy ◽  
Failure Modes ◽  
Single Pulse ◽  
Copper Metallization ◽  
Single Pulse Energy

Measuring Method of Transverse Mode in a Laser Beam Based on Spatial Distribution of Single Pulse Energy

2010 ◽  
Vol 39 (11) ◽  
pp. 2040-2044
Author(s):  
周娜 ZHOU Na ◽  
王石语 WANG Shiyu ◽  
过振 GUO Zhen ◽  
蔡德芳 CAI Defang ◽  
文建国 WEN Jianguo ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Laser Beam ◽  
Pulse Energy ◽  
Single Pulse ◽  
Transverse Mode ◽  
Measuring Method ◽  
Single Pulse Energy

Improvement of single pulse energy and laser efficiency by co-doping Cr3+ ions into the Er:YAG crystal

2019 ◽  
Vol 97 ◽  
pp. 197-202
Author(s):  
Huili Zhang ◽  
Xiaojun Sun ◽  
Dunlu Sun ◽  
Jianqiao Luo ◽  
Zhongqing Fang ◽  
...  
Keyword(s):  
Pulse Energy ◽  
Single Pulse ◽  
Single Pulse Energy ◽  
Laser Efficiency ◽  
Co Doping

scholarly journals Study on Femtosecond Laser Processing Characteristics of Nano-Crystalline CVD Diamond Coating

2019 ◽  
Vol 9 (20) ◽  
pp. 4273 ◽  
Author(s):  
Chao Wei ◽  
Yuping Ma ◽  
Yuan Han ◽  
Yao Zhang ◽  
Liu Yang ◽  
...  
Keyword(s):  
Pulse Energy ◽  
Ablation Threshold ◽  
Removal Rate ◽  
Single Pulse ◽  
Scanning Speed ◽  
Cvd Diamond ◽  
Diamond Coating ◽  
Single Pulse Energy ◽  
Fs Laser ◽  
Cvd Diamond Coating

Ultra-short pulse laser interaction with diamond materials has attracted extensive interest in micro- and nano-machining, especially for the fabrication of micro tools, because of the straightforward method and high precision. Thanks to the development of chemical vapor deposition (CVD) technology, high-quality CVD diamonds are employed in more varieties of tools as performance-enhancing coatings. The purpose of the experiments reported here was to explore the machinability of CVD diamond coating under the irradiation of femtosecond (fs) pulsed laser. The factor-control approach was adopted to investigate the influence of scanning speed, single pulse energy and repetition rate on the surface quality and carbon phase transition of CVD diamond coating. The material removal rate and surface roughness were evaluated. The interaction mechanism of scanning speed, single pulse energy, and repetition rate were discussed, and the fs laser ablation threshold of CVD diamond coating was calculated. It was demonstrated that two ablation mechanisms (weak and intensive) were in existence as evidenced by the distinct surface morphologies induced under different processing conditions. A strong dependence on the variation of scanning speed and pulse energy is identified in the examination of surface roughness and removal rate. Lorentzian–Gaussian deconvolution of Raman spectra illustrates that fs laser irradiation yields a strong modification effect on the coating and release the compressive stress in it. Furthermore, a newly defined parameter referring to the fs laser energies applied to unit volume was introduced to depict the degree of ablation and the Taguchi method was used to figure out the significance of different parameters. The ablation threshold of CVD diamond coating at the effective pulses of 90 is calculated to be 0.138 J/cm2.

Effects of a Single-pulse Energy Deposition on Steady Shock Wave Reflection

Shock Waves ◽  
2006 ◽  
Vol 15 (5) ◽  
pp. 353-362 ◽  
Author(s):  
D. V. Khotyanovsky ◽  
A. N. Kudryavtsev ◽  
M. S. Ivanov
Keyword(s):  
Shock Wave ◽  
Pulse Energy ◽  
Energy Deposition ◽  
Wave Reflection ◽  
Single Pulse ◽  
Single Pulse Energy ◽  
Shock Wave Reflection ◽  
Steady Shock

High single-pulse energy, passively Q-switched Nd:YAG laser for defence applications

2014 ◽  
Author(s):  
Marc W. Smillie ◽  
Mark Silver ◽  
Stephen T. Lee ◽  
Trevor J. Cook
Keyword(s):  
Pulse Energy ◽  
Nd:Yag Laser ◽  
Single Pulse ◽  
Single Pulse Energy

Design of Energy-Controllable Pulse Generator on Micro WEDM

2008 ◽  
Vol 375-376 ◽  
pp. 677-680
Author(s):  
Guan Xin Chi ◽  
Guo Hui Cao ◽  
Shi Chun Di ◽  
Zhen Long Wang
Keyword(s):  
Pulse Energy ◽  
Pulse Generator ◽  
Single Pulse ◽  
Key Factors ◽  
Addition Method ◽  
Single Pulse Energy ◽  
Machining Quality ◽  
Factors Influencing ◽  
Micro Wedm ◽  
Pulse Addition

Generator is one of the key factors in Micro WEDM, which can affect machining quality, precision and efficiency largely. The factors influencing discharge energy are discussed and analyzed, the pulse addition method increasing energy density under maintaining the single pulse energy is advanced. To reduce the influence of voltage to single pulse energy, the gap voltage is also controlled. The generator is designed and the validating experiment shows this generator can increase machining efficiency and quality to a certain extent.

An integration circuit for photodiode single‐pulse energy measurements

1974 ◽  
Vol 45 (10) ◽  
pp. 1293-1294 ◽  
Author(s):  
Paul P. Dymerski ◽  
Robert C. Dunbar
Keyword(s):  
Pulse Energy ◽  
Single Pulse ◽  
Single Pulse Energy

High single-pulse energy passively Q-switched laser based on Yb,Gd:SrF2 crystal

2020 ◽  
Vol 18 (10) ◽  
pp. 101401
Author(s):  
Mengfei Zhao ◽  
Cong Wang ◽  
Qianqian Hao ◽  
Zhengting Zou ◽  
Jie Liu ◽  
...  
Keyword(s):  
Pulse Energy ◽  
Single Pulse ◽  
Single Pulse Energy
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