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1. What is Soldering
A process of joining metallic surfaces with solder, without the melting of the base materials. The two metallic parts are joined by a molten Filler metal.
The primary difference is that, Welding is done at temperatures of 1400 C, brazing above 700 C and soldering below 450 C.
Traditionally, the electronic components are manufactured with leads (conductors) that are used to provide both mechanical support as well as electrical conductivity. The leads are soldered to the PCB after insertion.
1.4.1. Hand soldering:
It is the oldest method of soldering, it is still popular method in certain kinds kinds of applications:
The main disadvantages are operator training, speed, and consistent quality.
1.4.2 Machine Soldering:
Two prominently used machine soldering types are:
A. Wave Soldering - Primarily used for soldering through-hole components on to PCBs.
B. Reflow Soldering. - Used for soldering SMD components on to PCBs.
Reflow soldering of SM components have the following advantages over manual soldering:
The process steps are described in the chapters to follow.
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