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.
New Equipment | Solder Materials
Patented spiral-pump sensor provides quick, easy, repeatable measurements. Elimination of misprints due to incorrect paste conditions. Continuous measurement of newtonian and non-newtonian fluids with constant shear rate and shear time. Automatic
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
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.
Contact: Jacky.li@samtronik.net Categories Manual PCB Separator Album View larger image Brand SAMTRONIK Model SM-900 Shear Width 8-230MM Shear Speed 0-300mm/s adjustable
Used SMT Equipment | Circuit Board Assembly Products
The product introduction The SM-2009 scissors & pneumatic type separator, we use the most advanced non-stress idea to designed it, it’s help to prevent the chap phenomena as the PCB separated by the general separator, it’s improve the PCB’s quality
Parts & Supplies | Chipshooters / Chip Mounters
AI universal parts 30997607 46737003 SCRAP HOUSING ASSY, OFFSET 46737103 SCRAP HOUSING ASSY, "T" STYLE 46750601 COVER, CLINCH OFF 46750901 COVER, CLINCH VSL 46757801 PICKER AXIS MTR ASSY 46757901 X AXIS MTR ASSY 46758001 Y AXIS MTR ASSY 46
Industry Directory | Consultant / Service Provider
Founded in 1987, NovaStor Corporation is a leading developer and marketer of data management, data protection, and disaster recovery software for desktops and corporate networks.
