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This paper focuses on the influence of PVP concentration on physical properties of the silver nanoparticles (AgNps). AgNps were synthesized by polyol method in the presence of Polyvinylpyrrolidone (PVP) acting as a stabilizing agent in a molar relation of AgNO3: PVP = 1:1, 1:1.5 and 1:2. The optical and morphological characterizations of synthesized AgNps were performed using ultra violet visible...
A MoO3/Ag/MoO3 (MAM) transparent electrode was developed which aims for realizing transparent organic light-emitting diodes (TOLEDs) with different emission colors. The performance of the transparent electrode is significantly influenced by the thickness as well as the surface morphology of the silver film in MAM structure. The thermal evaporation process of the silver layer adopted varied deposition...
In this paper, the shear behavior of solder joints in BGA package structure was studied by test. The four kinds of solder joints used in the research are Sn-3Ag-0.5Cu, Sn-0.3Ag-0.7Cu, Sn-0.3Ag-0.7Cu-0.07La and Sn-0.3Ag-0.7Cu-0.07La-0.05Ce. The influence law of the assembly sequence on the mechanical properties of the solder joints under board-level structure were analyzed. At the same time, the fracture...
Jet printing technology solves the problem of control of solder paste's height in screen printing and it is also suitable for soft substrate printing, which may possible make it have wide application in complex integrated circuit. Conductive adhesive is a kind of adhesive containing conductive particles and resin matrix, forming by specific technology. The ECAs own better printing performance than...
In recent years, the core-shell hybrid materials are one of the hotspots in current research and attracted widely attentions[1]. The hybrid particles have good conductivity, while the density and cost would be greatly reduced as compared with the pure silver powder. And the hybrid particles have applied in the electromagnetic shielding materials, conductive coatings and absorbing materials because...
In this paper, four kinds of solder-SAC305, SAC0307, SAC0307-0.07La and SAC0307-0.07La-0.05Ce were prepared by experiment. The BGA solder joints (whose diameter is 900µm) of board-level structure was obtained by twice reflow soldering. We analyzed the shear strength, the fracture mode, and the fracture mechanism by applying shear load. At the same time, the effect of the thickness and morphology of...
A process of silver nanowire transparent conductive films has been developed to synthesize by organic needle-shaped precursor painting reduction. Needle-shaped nanowire precursors are simply synthesized by ultrasound irradiation of silver oxide and carboxylic acid as starting materials. The aspect ratio of the needle-shaped precursors is chenged by condition of ultrasound irradiation. Silver nanowires...
In this latest paper, spherical silver powders with different sizes were prepared by a liquid phase chemical reduction method, the spherical silver powders were processed by globe mill to prepare flake silver powders. Then the properties of back silver pastes made of spherical silver powders and flake silver powders were studied when these back silver pastes were printed and further formed back electrodes...
Silver (Ag) nanosheets were synthesised through a facile self-seeding strategy with binary reduction in the poly(vinylpyrrolidone) (PVP)–sodium dodecyl sulphate (SDS) aggregation microreactor, in which the size and morphology of Ag nanoparticles were able to be regulated by concentration or pH dependence. In this approach, PVP and SDS built the microreactor together and served as a synthesis template;...
Electrically conductive composites have been intensively studied as the interconnects and the printed lines in the next generation of electrical devices. Silver fillers have been widely accepted as the key conductive filler material due to their excellent electrical conductivity, malleability, chemical and mechanical stability. Here we for the first time introduce a scalable synthesis of the mono-dispersed...
DuPont1187 was frequently used as a palatable silver termination in the multilayer ceramic capacitor (MLCC). A phenomenon occurred on the palatable silver termination, which cladding material had poor connation with the sliver termination of MLCC and the failure of weld ability after aging. Base on different sintering conditions (different sintering temperature, bearing of sintering and stove environment),...
AgInS2 thin films are deposited by chemical spray pyrolysis technique. Aqueous solution of Silver Nitrate (AgNO3), Indium Chloride (InCl3), and Thiourea (CS (NH2)2) are used as the precursors and substrate temperature is kept at 3500C. Effect of variation in sulfur concentration was studied by varying the [S2−]/ [In3+] ratio. Orthorhombic structured AgInS2 with preferred orientation along (0 0 2)...
Silver nanoparticles with rod and round morphology have been synthesized by a simple polyol process. The morphology depended on those additives used in the process. The obtained Ag product has been applied to form a joint layer with high heat & electrical conductivity in electronic device. A transparent film and narrow conductive line with Ag nanowires have also been successfully fabricated on...
Plating permeation in the process of nickel and tin electroplating greatly reduced soldering reliability of products and drawn particularly attention from MLCC manufacturers. Based on the results of SEM and EDS analysis, it indicated that the silver end terminations spread from edges to middle in the surface of ceramic body in sintering process, and formed a lOOLim width transition areas near silver...
Somatic embryos were induced from cotyledon explants cultured on MS medium supplemented with 1.0 mg·L−1 2,4-D. Morphological and protein changes were performed aiming at the developmental process of somatic embryogenesis of E. sativa. The observation revealed that the embryos pass through the characteristic globular, heart, torpedo, and cotyledon stages. The developmental process of the somatic embryo...
Designed experiments are carried out to systematically study the effects of silver ions on morphology and yield of gold nanorods synthesized via a seed-mediated method. Gold nanorods synthesized with different silver ions and CTAB concentrations were characterized by absorption spectroscopy and TEM. The shape and yield of gold nanorods were effectively controlled by adjusting the concentration ratio...
In this study, Ag/NiNiP-plated Cu leadframes from two different processes are compared in terms of NiNiP surface morphology, composition of NiP layer, grain structures of Ni and NiP plated layers, and impurities in the interface of Ni/NiP plated layers. Their impacts were assessed after solder plating and baking. Scanning electron microscopy (SEM) shows that the grain size of Leadframe A (from Process...
Laser sintering of inkjet-printed silver nanoparicles was studied. Conducting lines were printed on glass and PET substrates of various thicknesses by a drop-n-demand (DOD) inkjet printer and silver nanoparticle ink. Selective sintering of the printed silver nanopartilces was then performed using laser beam to enhance electrical conductivity. Focused laser beam was irradiated normally to the silver...
This study reports on a new photoreduction approach for growing dense and continuous silver nanowires from an anodic aluminum oxide (AAO) template. Silver nanoparticles are first reduced then merged to form nanowires in the AAO pores from dried silver nitride by laser irradiation. The morphology and composition of the grown nanostructures are characterized and the detailed photochemical growth mechanism...
Monodisperse silver nanospheres have been synthesised in high yield by a developed polyol process, in which silver nitrate (AgNO3) was reduced by ethylene glycol (EG) with the assistance of polyvinyl pyrrolidone (PVP) and potassium iodide (KI). Both the KI concentration and reaction temperature are crucial for the morphologies and diameter distribution of silver nanostructures. Transmission electron...
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