Soldered connections are electrical joints made by melting a filler metal, called solder, to join two or more electronic components. This process creates a strong and conductive bond, ensuring that electricity can flow smoothly between the parts. Solder is typically made of a mixture of tin and lead, although lead-free options are also available for safety and environmental reasons. These connections are commonly used in various electronic devices, such as circuit boards and appliances. Proper soldering techniques are essential for reliable connections, as poor solder joints can lead to malfunctioning devices. Tools like soldering irons and flux are often used to create effective soldered connections.