Levels on solder joint
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Through Hole Solder Joint Evaluation
www.ipctraining.orgCondition Levels Land Coverage Excess Solder Vertical Fill Wetting, Lead & Barrel Wetting of Lead, Land & Barrel Contact Angle Discerning the Lead Solder Balls Solder Bridging Cavities Cold Solder Joint Coating Meniscus in Solder Joint Corrosion / Surface Appearance Disturbed Solder Joint Exposed Basis Metal Foreign Object Debris (FOD)
Recommended Soldering Techniques
www.diodes.comirregular and dispersed solder droplets on the joint surface, often separated by a thin layer of solder between them. Non-wetting: Solder may not adhere to the leads or terminals of a device if the plating thickness is too thin. This problem especially applies to axial-leaded devices since the solder must bridge
Lead in Construction
www.osha.govtank linings, and electrical conduits. In plumbing, soft solder, used chiefly for soldering tinplate and copper pipe joints, is an alloy of lead and tin. Soft solder has been banned for many uses in the United States. In addition, the Consumer Product Safety Commission bans the use of lead-based paint in residences.
EXPOSURE TO LEAD: A MAJOR PUBLIC HEALTH CONCERN
www.who.intreductions in the use of lead in petrol (gasoline), paint, plumbing and solder have resulted in substantial reductions in lead levels in the blood. 1. However, significant sources of exposure to lead still remain, particularly in developing countries. Further efforts are required to continue
Requirements for Soldering Fluxes
www.ipc.orgity solder interconnections. This standard may be used for quality control and procurement purposes. 1.2 Purpose The purpose of this standard is to classify and characterize tin/lead and lead-free soldering flux materials for use in electronic metallurgical interconnections for printed circuit board assembly. Soldering flux materials include ...