Fast and low-temperature sintering of Ag paste due to nanoparticles formed in situ

2019 ◽  
Vol 30 (19) ◽  
pp. 18080-18087 ◽  
Author(s):  
Jeyun Yeom ◽  
Hao Zhang ◽  
Cai-Fu Li ◽  
Katsuaki Suganuma
Keyword(s):  
Low Temperature ◽  
Low Temperature Sintering ◽  
Ag Paste

Low Temperature Sintering Bonding Process Using Ag Nanoparticles Derived from Ag2O for Packaging of High-Temperature Electronics

2012 ◽  
Vol 706-709 ◽  
pp. 2962-2967 ◽  
Author(s):  
Akio Hirose ◽  
Naoya Takeda ◽  
Yosuke Konaka ◽  
Hiroaki Tatsumi ◽  
Yusuke Akada ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ag Nanoparticles ◽  
Electronics Packaging ◽  
Bonding Process ◽  
Low Temperature Sintering ◽  
High Melting Point ◽  
Organic Nanoparticles ◽  
High Temperature Electronics ◽  
Low Temperature Bonding

A novel bonding process using Ag2O paste composed of Ag2O particles and a reducing agent has been proposed as a Pb-free alternative of high melting point solders in electronics packaging. Ag2O paste formed Ag nanoparticles through the redox reaction in the bonding process and in-situ formed Ag nanoparticles sintered immediately. While the bonding process using Ag metallo-organic nanoparticles, which have been proposed, was unfavorable to the bonding at 250 degree Celsius or lower in terms of requiring removal of stable organic shells, the bonding process using Ag2O paste demonstrated the possibility of further low-temperature bonding.

scholarly journals Mechanism of Low Temperature Sintering-Bonding through In-Situ Formation of Silver Nanoparticles Using Silver Oxide Microparticles

2013 ◽  
Vol 54 (6) ◽  
pp. 872-878 ◽  
Author(s):  
Fengwen Mu ◽  
Zhenyu Zhao ◽  
Guisheng Zou ◽  
Hailin Bai ◽  
Aiping Wu ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Low Temperature ◽  
Silver Oxide ◽  
Low Temperature Sintering

In situ Tensile Experiments at Low Temperatures on Niobium Single Crystals by H.V.E.M.

1975 ◽  
Vol 33 ◽  
pp. 58-59
Author(s):  
F. H. Louchet ◽  
L. P. Kubin
Keyword(s):  
Electron Microscope ◽  
Transition Temperature ◽  
Low Temperature ◽  
Slip System ◽  
Low Temperatures ◽  
Tensile Axis ◽  
Image Intensifier ◽  
Screw Dislocations ◽  
Source Operation

Experiments have been carried out on the 3 MeV electron microscope in Toulouse. The low temperature straining holder has been previously described Images given by an image intensifier are recorded on magnetic tape.The microtensile niobium samples are cut in a plane with the two operative slip directions [111] and lying in the foil plane. The tensile axis is near [011].Our results concern:- The transition temperature of niobium near 220 K: at this temperature and below an increasing difference appears between the mobilities of the screw and edge portions of dislocations loops. Source operation and interactions between screw dislocations of different slip system have been recorded.

Role of boundaries in the crystallization of amorphous films

1988 ◽  
Vol 46 ◽  
pp. 626-627
Author(s):  
D. A. Smith
Keyword(s):  
Low Temperature ◽  
Amorphous State ◽  
Nucleation And Growth ◽  
Amorphous Films ◽  
Island Nucleation ◽  
Surface Steps ◽  
Transmission Electron ◽  
Component Systems ◽  
Temperature Deposition

The nucleation and growth processes which lead to the formation of a thin film are particularly amenable to investigation by transmission electron microscopy either in situ or subsequent to deposition. In situ studies have enabled the observation of island nucleation and growth, together with addition of atoms to surface steps. This paper is concerned with post-deposition crystallization of amorphous alloys. It will be argued that the processes occurring during low temperature deposition of one component systems are related but the evidence is mainly indirect. Amorphous films result when the deposition conditions such as low temperature or the presence of impurities (intentional or unintentional) preclude the atomic mobility necessary for crystallization. Representative examples of this behavior are CVD silicon grown below about 670°C, metalloids, such as antimony deposited at room temperature, binary alloys or compounds such as Cu-Ag or Cr O2, respectively. Elemental metals are not stable in the amorphous state.

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