: Equalizing temperatures across the entire board and allowing the flux to activate and clean the surfaces.
A compliant thermal profile typically consists of four critical phases:
: Gradually increasing the temperature to avoid thermal shock to the PCB or components. IPC-7530
, officially titled Guidelines for Temperature Profiling for Mass Soldering Processes , is the industry standard for creating and managing thermal profiles in electronics manufacturing. It ensures that all solder joints reach the necessary temperatures for metallurgical bonding without damaging heat-sensitive components.
The current version is (released January 2025), which expands beyond reflow and wave soldering to include vapor phase, laser, and selective soldering processes. Core Stages of a Thermal Profile : Equalizing temperatures across the entire board and
: The stage where the temperature exceeds the solder's liquidus point to form the joint.
: Usually 20°C to 40°C above the solder's melting point. It ensures that all solder joints reach the
: The duration the solder remains in a liquid state.