Photophoresis-based laser manipulation of airborne particles using structured laser beams

2020 ◽  
Author(s):  
Alexey P. Porfirev ◽  
Anna Dubman
Keyword(s):  
Airborne Particles ◽  
Laser Beams ◽  
Laser Manipulation

Identifying groups of airborne particles by ordination

1994 ◽  
Vol 52 ◽  
pp. 856-857
Author(s):  
M. Shlepr ◽  
C. M. Vicroy
Keyword(s):  
Elemental Analysis ◽  
Energy Dispersive Spectroscopy ◽  
Manufacturing Process ◽  
Spatial Representation ◽  
Airborne Particles ◽  
Common Source ◽  
Data Set ◽  
Microelectronics Industry ◽  
Induced Changes ◽  
Source Materials

The microelectronics industry is heavily tasked with minimizing contaminates at all steps of the manufacturing process. Particles are generated by physical and/or chemical fragmentation from a mothersource. The tools and macrovolumes of chemicals used for processing, the environment surrounding the process, and the circuits themselves are all potential particle sources. A first step in eliminating these contaminants is to identify their source. Elemental analysis of the particles often proves useful toward this goal, and energy dispersive spectroscopy (EDS) is a commonly used technique. However, the large variety of source materials and process induced changes in the particles often make it difficult to discern if the particles are from a common source.Ordination is commonly used in ecology to understand community relationships. This technique usespair-wise measures of similarity. Separation of the data set is based on discrimination functions. Theend product is a spatial representation of the data with the distance between points equaling the degree of dissimilarity.

Mode designations of laser beams

1985 ◽  
Vol 132 (3) ◽  
pp. 191 ◽  
Author(s):  
Luk Kwai-Man ◽  
Yu Ping-Kong
Keyword(s):  
Laser Beams

RESEARCH: Dry Heat Processing of Single-Use Respirators and Surgical Masks

2020 ◽  
Vol 54 (6) ◽  
pp. 410-416
Author(s):  
Joyce M. Hansen ◽  
Scott Weiss ◽  
Terra A. Kremer ◽  
Myrelis Aguilar ◽  
Gerald McDonnell
Keyword(s):  
Microbial Contamination ◽  
Healthcare Providers ◽  
High Volume ◽  
Airborne Particles ◽  
Heat Processing ◽  
Protective Equipment ◽  
Healthcare Facilities ◽  
Dry Heat ◽  
Surgical Masks ◽  
Single Use

The COVID-19 pandemic, caused by severe acute respiratory syndrome coronavirus 2, has challenged healthcare providers in maintaining the supply of critical personal protective equipment, including single-use respirators and surgical masks. Single-use respirators and surgical masks can reduce risks from the inhalation of airborne particles and microbial contamination. The recent high-volume demand for single-use respirators and surgical masks has resulted in many healthcare facilities considering processing to address critical shortages. The dry heat process of 80°C (176°F) for two hours (120 min) has been confirmed to be an appropriate method for single-use respirator and surgical mask processing.

Welding characteristics with multiple Nd:YAG laser beams combined at surface of workpiece

1998 ◽  
Author(s):  
Narikiyo Tom ◽  
Fujinaga Shigeki ◽  
Takenaka Hiroo ◽  
Ohmori Akira ◽  
Katsunori Inoue
Keyword(s):  
Nd:Yag Laser ◽  
Laser Beams

Melting characteristics of metals by combined laser beams with different wavelength

2000 ◽  
Author(s):  
Jyong Hyun Moon ◽  
Masami Mizutani ◽  
Michio Goto ◽  
Seiji Katayama ◽  
Akira Matsunawa
Keyword(s):  
Laser Beams ◽  
Melting Characteristics
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