Study and Measurement of Micro-Scale Bonding Strength in Vertical Direction

2007 ◽  
Author(s):  
Dongning Liu ◽  
Dacheng Zhang
Keyword(s):  
Edge Effect ◽  
Bonding Strength ◽  
Vertical Direction ◽  
In Situ Monitoring ◽  
Vertical Force ◽  
Bonding Quality ◽  
Micro Scale ◽  
Silicon Cantilever ◽  
Bonding Area

A new way to evaluate the strength of micro-scale bonding is developed by using a silicon cantilever beam bonded on the substrate by a small anchor. The central concept is that the bonding area will be fractured when a certain vertical force is loaded on it, and this force can be used as a “standard”. This test is easy to be carried out. It also can be used in in-situ bonding quality monitoring in MEMS fabrication. Edge effect, the length of the bonding area partly determines the bonding strength, is found in micro-scale bonding. The coefficients of the edge effect, which determine the bonding strength at the interface of the bonding are, are calculated. Designers can use the equations and the coefficients to design the bonding areas according to the requirement of bonding strength for their devices or the appropriate test structures for the bonding quality in-situ monitoring.

scholarly journals The Influence of the Roll-Laminating Process on the Bonding Quality of Polymer-Coated Steel Interface

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 472
Author(s):  
Jiyang Liu ◽  
Qingdong Zhang ◽  
Boyang Zhang ◽  
Mingyang Yu
Keyword(s):  
Bonding Strength ◽  
Coated Steel ◽  
Interface Bonding ◽  
Relevant Research ◽  
Bonding Quality ◽  
Bonding Area ◽  
New Type ◽  
Lamination Process ◽  
Bonding Rate

Polymer-coated steel (PCS) is a new type of metal packaging material under development, which has better performance in saving resources, energy, and environmental protection. The lamination process has an important influence on the bonding quality of the PCS interface. PCS samples under different lamination temperatures and lamination speeds were prepared through experiments. A binding rate is defined to represent the real bonding area of the PCS interface. The micro-scratch tester and scanner are used to study the influence of the lamination process on the bonding rate and bonding strength of the PCS interface. It is proposed that the bonding rate and bonding strength of the PCS interface increases with the increase of lamination temperature and increases with the decrease of lamination speed. The PCS interface bonding rate and bonding strength are positively correlated. SEM and DSC experiments revealed the cause of bubbles on the PCS surface. It is proposed that controlling the uniformity of the TFS surface temperature can reduce the quality defects of PCS surface bubbles. Relevant research results bring guiding significance for the formation of enterprises.

Fore-Aft Forces in Tire-Wheel Assemblies Generated by Unbalances and the Influence of Balancing

1991 ◽  
Vol 19 (3) ◽  
pp. 142-162 ◽  
Author(s):  
D. S. Stutts ◽  
W. Soedel ◽  
S. K. Jha
Keyword(s):  
Mathematical Model ◽  
Elastic Foundation ◽  
Torsional Oscillation ◽  
Vertical Direction ◽  
Torsional Stiffness ◽  
Rolling Motion ◽  
Vertical Force ◽  
Horizontal Force ◽  
Wheel Rim ◽  
Open Question

Abstract When measuring bearing forces of the tire-wheel assembly during drum tests, it was found that beyond certain speeds, the horizontal force variations or so-called fore-aft forces were larger than the force variations in the vertical direction. The explanation of this phenomenon is still somewhat an open question. One of the hypothetical models argues in favor of torsional oscillations caused by a changing rolling radius. But it appears that there is a simpler answer. In this paper, a mathematical model of a tire consisting of a rigid tread ring connected to a freely rotating wheel or hub through an elastic foundation which has radial and torsional stiffness was developed. This model shows that an unbalanced mass on the tread ring will cause an oscillatory rolling motion of the tread ring on the drum which is superimposed on the nominal rolling. This will indeed result in larger fore-aft than vertical force variations beyond certain speeds, which are a function of run-out. The rolling motion is in a certain sense a torsional oscillation, but postulation of a changing rolling radius is not necessary for its creation. The model also shows the limitation on balancing the tire-wheel assembly at the wheel rim if the unbalance occurs at the tread band.

scholarly journals Development of an electrochemical sensor for in-situ monitoring of reactive species produced by cold physical plasma

2021 ◽  
Vol 326 ◽  
pp. 129007
Author(s):  
Zahra Nasri ◽  
Giuliana Bruno ◽  
Sander Bekeschus ◽  
Klaus-Dieter Weltmann ◽  
Thomas von Woedtke ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Reactive Species ◽  
In Situ Monitoring ◽  
Physical Plasma

In Situ Monitoring of Polaron Localization and Cell Activity with Charge Accumulation Spectroscopy

2021 ◽  
pp. 2105799
Author(s):  
Yu Zhang ◽  
Li Yang ◽  
Jintao Wang ◽  
Wangying Xu ◽  
Qiming Zeng ◽  
...  
Keyword(s):  
Cell Activity ◽  
In Situ Monitoring ◽  
Charge Accumulation
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