New Equipment | Test Equipment
Application Computer Control Electro-Hydraulic Servo Universal Testing Machine is suitable to test various metallic & non-metallic materials for tension, compression, bending and shearing strength. It can be capable of testing the characters of mate
Epoxy 4089 is a single part, epoxy adhesive used for bonding SMT components to a PWB prior to double sided reflow or wave solder assembly. Epoxy 4089 has been formulated for use in all types of high speed dispensing equipment including air pressure,
Technical Library | 2015-02-12 16:57:56.0
Electronic systems are known to be affected by the environmental and mechanical conditions, such as humidity, temperature, thermal shocks and vibration. These adverse environmental operating conditions, with time, could degrade the mechanical efficiency of the system and might lead to catastrophic failures.The aim of this study is to investigate the mechanical integrity of lead-free ball grid array (BGA) solder joints subjected to isothermal ageing at 150°C for up to 1000 hours. Upon ageing at 150°C the Sn-3.5Ag solder alloy initially age-softened for up to 200 hours. This behaviour was linked to the coarsening of grains. When aged beyond 200 hours the shear strength was found to increase up to 400 hours. This age-hardening was correlated with precipitation of hard Ag3Sn particles in Sn matrix. Further ageing resulted in gradual decrease in shear strength. This can be explained as the combined effect of precipitation coarsening and growth of intermetallic layer. The fractured surfaces of the broken solder balls were also investigated under a Scanning Electron Microscope. The shear failures were generally due to ductile fractures in bulk solders irrespective of the ageing time.
Industry Directory | Manufacturer
BLIND RIVETS,BLIND NUTS,BLIND RIVETING TOOLS,STAINLESS STEEL CABLE TIES
New Equipment | Solder Materials
SM-150G and SM-155P are single component epoxy adhesive, specifically designed for the bonding of surface mount devices to PCB in the lead-free process. SM-150G is suitable for glue dot process and SM-155P is suitable for the printing machine process
Industry Directory | Manufacturer / Research Institute / Laboratory / School
Manufacturer of surface deposition and plasma surface cleaning and etching equipment offering reliable, repeatable cleaning and etching of PCBs and other materials.
New Equipment | Solder Materials
KappTecZ is a high temperature, high strength solder that may be used on most metals, but works extremely well on aluminum, copper and stainless steel. It has a high tolerance to vibration and stress, and good elongation for use on dissimilar metals.
Industry Directory | Manufacturer / Other
STAINLESS STEEL CABLE TIES,BLIND RIVETS,BLIND NUTS,FASTENERS,TOOLS
Industry Directory | Manufacturer
blind rivets,stainless steel cable ties,blind nuts,blind riveting tools,fasteners
Technical Library | 2020-12-16 18:38:49.0
Fabrication of large structures using out-of-autoclave prepreg materials will lead to a great amount of savings in manufacturing costs. In the out-of-autoclave processing method, the presence of voids inside the laminate has been an issue due to the lack of high pressure during manufacturing. This study aims primarily to observe the moisture absorption response of composite samples containing different levels of void. By changing the vacuum level inside the bag during the manufacturing process, three different unidirectional laminates at three levels of void have been manufactured. After immersing the samples in warm water at 60°C for about one year, the moisture absorption level was monitored and then diffusion coefficients were calculated using Fick's law. Results show that the moisture absorption coefficient changes by %8 within the experimental range of void contents. The mechanical behaviour of these laminates has been studied at four different moisture levels by performing dynamic mechanical analysis (DMA) and short beam shear tests. Empirical results indicate that, in general, interlaminar shear strength and glass transition temperature decrease by moisture build-up inside the samples. DiBenedetto equation is proposed to make a correlation between the moisture content and glass transition temperature.
