Solder is a fusible metal alloy used to create a permanent bond between metal workpieces. The main function of solder is to join electrical components together by melting and flowing into the space between tightly-fitted parts, which cools down to form a strong electrical and mechanical connection. It serves as a conductive adhesive that establishes the required electrical continuity in the circuits of electronic devices, ensuring that electronic signals or electric power can be distributed across connected components. The characteristics of solder include its melting point, which is lower than the pieces being joined, its ability to wet the materials it's bonding, and its composition, which can vary to include eLEMents like tin, lead, silver, copper, or other metals to enhance its performance properties.
Solder is extensively used in the electronics industry for assembling printed circuit boards (PCBs), wiring, and constructing electronic devices. Its principal attributes are its electrical conductivity, thermal conductivity, and durability, making it essential in ensuring the reliability and functionality of electronic devices. Different types of solder are tailored to various applications, with lead-free solders being popular due to environmental and health safety concerns. Some of the prominent manufacturers of solder include Kester, Senju Metal Industry Co., Ltd., and Alpha Assembly Solutions.