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Infrared radiation for reflow soldering – short response times, long life
Reflow soldering calls for lamps that are not only durable but also offer good control through short response times. Short-wave infrared lamps are a reliable solution.
Reflow soldering is a soft soldering process for soldering SMD components. These components do not have wire connectors but are soldered directly onto a pc board by means of solderable contact pads. Reflow soldering with infrared lamps involves the boards passing through a number of zones.
The boards are moved through an oven by a conveyor system. The soldering process can be controlled by allowing the boards to dwell in different temperature zones. Infrared lamps are used here because of their high efficiency, short response times and long average life.
HALOTHERM infrared halogen lamps
HALOTHERM lamps produce a maximum radiation of around 1100 nanometer (nm) and are ideal as irradiation sources for reflow soldering. These short-wave infrared halogen lamps (IR A) have a tungsten wire filament enclosed in a quartz tube. The advantage here is that quartz is highly transparent for infrared radiation. This means that the thermal output is emitted in the short-wave infrared range with minimal losses. In addition, the filler gas in the quartz vessel contains halogen additives to prevent the bulb from blackening and ensure long average life. HALOTHERM lamps can be installed in machinery and production facilities, take up very little space and are easy to service. They are renowned for their short response times, precise regulation and high efficiency.