Results 41 to 50 of about 386,628 (313)

Characterization of wafer-level thermocompression bonds [PDF]

open access: yes, 2004
Thermocompression bonding joins substrates via a bonding layer. In this paper, silicon substrates were bonded using gold thin films. Experimental data on the effects of bonding pressure (30 to 120 MPa), temperature (260 and 300/spl deg/C), and time (2 to
Tsau, C.H.   +2 more
core   +1 more source

Direct estimate of the internal π-donation to the carbene centre within N-heterocyclic carbenes and related molecules

open access: yesBeilstein Journal of Organic Chemistry, 2015
Fifteen cyclic and acylic carbenes have been calculated with density functional theory at the BP86/def2-TZVPP level. The strength of the internal X→p(π) π-donation of heteroatoms and carbon which are bonded to the C(II) atom is estimated with the help of
Diego M. Andrada   +3 more
doaj   +1 more source

Towards an understanding of the bonding in polyoxometalates through bond order and bond energy analysis

open access: yesFaraday Discussions, 2003
The molecular and electronic structures of transition metal complexes, [MOCl5]n- (n = 2 for M = V,Nb,Ta and n = 1 for Mo,W) and mixed-metal polyoxometalates, [M'M5O19]3-V,Nb,Ta, M = Mo,W) containing a single terminal oxo group on each metal, and of complexes of the uranyl ion [UO2]2+, [UO2(H2O)5]2+ and [UO2Cl4]2-, have been calculated using density ...
Bridgeman, Adam, Cavigliasso, German
openaire   +2 more sources

Quantitative Analysis of Multiplex H-Bonds [PDF]

open access: yesJournal of the American Chemical Society, 2020
H-bonding is the predominant geometrical determinant of biomolecular structure and interactions. As such, considerable analyses have been undertaken to study its detailed energetics. The focus, however, has been mostly reserved for H-bonds comprising a single donor and a single acceptor.
Esther S. Brielle, Isaiah T. Arkin
openaire   +2 more sources

Bonding and correlation analysis of various SiCO isomers [PDF]

open access: yes, 2002
The structural properties for various SiCO isomers in the singlet and triplet states have been investigated using CASSCF methods with a 6-311 +G* basis set and also using three DFT and MP2 with same basis set for those systems except for the linear ...
Bu, YX, Han, KL
core   +1 more source

A numerical study on thermal bonding with preheating technique for polypropylene microfluidic device

open access: yese-Polymers, 2023
This study presents a method for producing microfluidic chips from polypropylene using a pre-heated bonding area and thermal bonding technology. ANSYS was utilized to investigate the effects of bonding parameters and microchannel deformation and predict ...
Almezgagi Esam Abdulrahman   +3 more
doaj   +1 more source

Thin bonding wires temperature measurement using optical fiber sensors [PDF]

open access: yes, 2011
In this work we demonstrate the use of optical fiber sensors to measure temperature in thin metallic bonding wires. Temperature was measured in copper wires with diameter of 0.10, 0.28, 0.60 and 0.70 mm and for different values of the driven electrical ...
P. Antunes   +14 more
core   +2 more sources

Enhancement of fatigue resistance by recrystallization and grain growth to eliminate bonding interfaces in Cu–Cu joints

open access: yesScientific Reports, 2022
Cu–Cu joints have been adopted for ultra-high density of packaging for high-end devices. However, cracks may form and propagate along the bonding interfaces during fatigue tests.
Jia-Juen Ong   +6 more
doaj   +1 more source

The Orbital Origins of Chemical Bonding in Phase-Change Materials [PDF]

open access: yes, 2021
Layered phase-change materials in the Ge–Sb–Te-system are widely used in data storage and are the subject of intense research to understand the elusive quantum-chemical origin of their unique properties.
Peter C., Müller   +3 more
core   +1 more source

Effect of surface cleaning on interface bonding performance for 316H stainless steel joints manufactured by additive forging

open access: yesMaterials & Design, 2021
Additive forging is a newly developed method to manufacture heavy forgings by using multilayer hot-compression bonding. However, the relationship between surface cleaning and bonding performance of bonded samples in the additive forging process is ...
Yong Zhao   +8 more
doaj   +1 more source

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