Results 171 to 180 of about 9,909,772 (235)

Study on contact distortion during high aspect ratio contact SiO2 etching

Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 2014
As pattern density is increased in semiconductor integrated circuits (ICs) and pattern sizes are decreased to nanometer scale, high aspect ratio contact etching has become one of the most difficult processes in nanoscale IC fabrication. The increase in aspect ratio of the contact oxide etching raises problems such as low mask selectivity, microloading,
Jong Kyu Kim, Sung Ho Lee, Sung Il Cho, Geun Young Yeom   +3 more
openaire   +1 more source

Contacts on high aspect ratio 3D structures

Microelectronic Engineering, 2011
We present a novel way for depositing material on the top surface of three-dimensional (3D) structures. This process supplies the possibility of applying a wide range of materials on the top of structures which are too high to be processed with conventional techniques. A planarization process or vertical sidewalls of the structures are not necessary.
R. Neumann, M. Al-Suleiman, M. Erenburg, J. Ledig, H.-H. Wehmann, A. Waag   +5 more
openaire   +1 more source

Variable Slip Ratio Rolling Contact Fatigue Tester

Journal of Testing and Evaluation, 2018
Abstract Rolling contact fatigue in bearings, gears, and railway tracks is a common problem experienced in many industrial applications. Given the stochastic nature of fatigue failures, design predictions are generally complex and difficult.
Marcellin Zahui, Satyam Deshmukh, Subodh Subedi   +2 more
openaire   +1 more source

Lubricant Rupture Ratio at Elastohydrodynamically Lubricated Contact Outlet

Tribology Letters, 2015
Elastohydrodynamically lubricated (EHL) contacts rarely exist as single contacts. Multiple contacts or single contacts subjected to the repeated over-rolling represent more often the case in practical applications. A typical example is the rolling element bearing.
David Košťál, David Nečas, Petr Šperka, Petr Svoboda, Ivan Křupka, Martin Hartl   +5 more
openaire   +1 more source

The investigation of contact ratio in mixed lubrication

Tribology International, 2006
In order to describe the mixed lubrication in nano-scale which is constituted from dry friction, boundary lubrication, and thin film lubrication, a contact ratio between surfaces of a glass disk and a steel ball in a pure rolling process has been measured by the technique of Relative Optical Interference Intensity (ROII) with a resolution of 0.5 nm in ...
J.B. Luo, S. Liu
openaire   +1 more source

Contact Ratio, Interference and Backlash

1987
The meshing cycle of a tooth pair begins when the teeth first make contact, and ends when the contact is broken. If one gear is to drive the other in a continuous manner, there must clearly be at least one tooth pair in contact at all times. However, it is found that smooth operation is only possible when the contact at one tooth pair continues until ...
openaire   +1 more source

Modifying the Lambda Ratio to Functional Line Contacts

Tribology Transactions, 1990
Lambda ratio, the lubricant film thickness divided by the composite roughness within an operating rolling element bearing, has been recognized for more than 25 years as an important contact parameter related to bearing performance, primarily fatigue life.
C. A. Moyer, L. L. Bahney
openaire   +1 more source

Investigation on high contact ratio harmonic two-dimensional tooth profile design based on mid-point meshing method

Journal of Mechanical Science and Technology, 2023
Jianzhong Huang, Jiu-hua Xu, Ning Qian
semanticscholar   +1 more source

Influence of contact tracing on sex ratios in gonorrhoea

Public Health, 1975
The effect of contact tracing in reducing the sex ratio for cases of gonorrhoea has been considered using data provided annually by the Department of Health. A 10-year period was considered. By further classification of the figures into those cases that came directly to the clinics and those that were seen as a result of contact racing, the direct case
openaire   +2 more sources

Contact Ratio: A New Precise Measurement for Wettability

The Canadian Journal of Chemical Engineering, 2008
According to Young's equation, the contact angle "θ" is considered as the measurable wettability parameter. The rate of change in the contact angle has been commonly used as the relevant parameter of spreading dynamics notwithstanding the difficulties associated with contact angle measurements that are well recognized in the literature.
Abdullatif M. Alteraifi, Abdel Hafiz Hirbawi   +1 more
openaire   +1 more source