Decorative picture
Contact us
Blog

Questions & Answers

Here is an overview of frequently asked questions and answers

Decorative picture

The soldering temperature in vapour-phase soldering typically ranges from 200 °C to 260 °C. It is determined by the boiling point of the heat transfer fluid used and remains constant throughout the entire process, ensuring a high degree of process reliability in electronics manufacturing.

Decorative picture

In the aerospace industry, vapour-phase soldering offers maximum reliability and low defect rates.

The process ensures uniform heating even for complex assemblies and reduces typical soldering defects. At the same time, its high reproducibility enables the stable processes required for safety-critical applications.

Decorative picture

Vapour-phase soldering is used in defense technology because it enables the reliable fabrication of complex and heterogeneous assemblies.

Electronic systems in this field often consist of components with varying thermal properties. This process ensures stable solder joints and high process reliability, even under demanding conditions.

Decorative picture

Vapour-phase soldering plays an important role in the automotive industry, particularly in the manufacture of modern electronic systems.

It is frequently used for control units, sensors, and power electronics. The uniform heating and high process reliability improve the long-term reliability of these systems.

Decorative picture

The vapour-phase soldering process begins with the application of solder paste and the placement of components on the assembly. It is then placed in a vapour zone where a heated medium condenses and transfers heat. Once the reflow temperature is reached, the solder melts and bonds the components. This is followed by controlled cooling.

Decorative picture

In vapour-phase soldering, hot vapour condenses on the cooler assembly. This releases latent heat, which is transferred directly and evenly to all components. This process ensures uniform heating regardless of geometry or thermal mass.

Decorative picture

The maximum temperature during vapour-phase soldering corresponds to the boiling point of the medium used and typically ranges between 200 °C and 260 °C. Higher temperatures are not possible, which makes the process particularly safe and controllable.

Decorative picture

The reflow phase is the step in the soldering process during which the solder paste melts and the electrical and mechanical connections between the components are formed. It begins as soon as the assembly reaches the required soldering temperature.

Decorative picture

The vapour-phase soldering process is reproducible because the temperature is physically determined by the boiling point of the medium (max. 260°C). Combined with controlled process management and sensor technology, this creates stable and repeatable conditions that ensure consistent soldering quality.

Decorative picture

Vapour-phase soldering is particularly well-suited for medical technology because it reliably protects sensitive and highly integrated components.

Uniform heating and the physically limited temperature (max. 260°C) prevent overheating. At the same time, high process stability ensures consistent quality, which is absolutely essential for medical applications. Suppliers such as IBL-Löttechnik support these requirements with precise soldering processes and specially developed system solutions.

Decorative picture

In vapour-phase soldering, the maximum soldering temperature corresponds exactly to the boiling point of the medium used. As soon as the Galden fluid evaporates, the temperature cannot rise any higher. This automatically limits and precisely controls heat transfer.

Decorative picture

Galden is used in soldering technology because it is a thermally stable heat transfer fluid with a precisely defined boiling point. This enables uniform and reproducible heat transfer, which is crucial for high-quality processes in electronics manufacturing.

Decorative picture

The constant soldering temperature ensures that components cannot overheat. At the same time, it creates stable process conditions that enable consistent soldering quality. This feature makes vapour-phase soldering particularly reliable for demanding applications.

Decorative picture

Higher soldering temperatures are required primarily for lead-free solders, as they have higher melting points. In such cases, fluids with higher boiling points are used to reliably reach the required temperature.

Decorative picture

Temperature control in vapour-phase soldering is based on the boiling point of the heat transfer fluid used. This keeps the maximum temperature constant and prevents overheating.

Decorative picture

The temperature remains stable because it is physically limited by the fluid's phase change. During condensation, heat is transferred precisely to the boiling point, regardless of external factors.

Decorative picture

In reflow soldering, temperature control is critical to the quality of the solder joints. Vapour-phase soldering offers advantages in this regard, as the temperature is automatically maintained at a constant level, enabling consistent, reproducible results.

Decorative picture

In electronics manufacturing, the temperature during vapour-phase soldering is monitored using sensors, process controllers, and temperature profiling systems. This allows the entire process to be documented and optimized.

Decorative picture

In vapour-phase soldering, a special medium called Galden is heated until it vaporizes. The resulting vapour condenses on the cooler assembly, releasing heat in the process. Once the soldering temperature is reached, the solder paste melts and bonds the components electrically and mechanically.

Decorative picture

Complex assemblies often consist of components with very different thermal masses and thermal conductivities. With vapour-phase soldering, however, heating occurs uniformly across the entire surface, regardless of these factors. This reduces temperature gradients, which minimizes thermal stresses and significantly lowers the risk of warping or component damage.

Decorative picture

Vapour-phase soldering protects sensitive components because the maximum temperature (max. 260°C) is limited by the boiling point of the medium. Overheating is not possible, which reliably prevents thermal damage.

Decorative picture

Vapour-phase soldering prevents common problems such as uneven heating, oxidation, and overheating. This reduces soldering defects such as tombstoning or cold joints and increases the reliability of the assemblies.

Decorative picture

Galden is a perfluorinated polyether (PFPE) used as a heat transfer fluid in vapour-phase soldering. It enables uniform heat transfer, and its boiling point determines the maximum process temperature.

Decorative picture

Galden is used because it is thermally stable, chemically inert, and non-flammable. These properties ensure safe, reproducible, and gentle handling of assemblies in electronics manufacturing.

Decorative picture

Galden's boiling point determines the maximum temperature (max. 260°C) in the process. This prevents overheating and ensures constant, controlled heating of the assembly.

Decorative picture

Yes, Galden can be reused multiple times in the process. After condensation, it is recovered, filtered, and returned to the cycle, thereby reducing material consumption and operating costs.

Decorative picture

Vapour-phase soldering is a reflow soldering process in which the assembly is heated not by hot air or radiation, but by condensing vapour. A special medium - in this case, Galden - is vaporized, and the assembly is placed within this vapor zone. The vapor condenses on the cooler surface of the PCB, releasing latent heat in the process. This energy is used to selectively melt the solder paste and create stable electrical connections.

Decorative picture

Vapour-phase soldering provides more uniform heat distribution than reflow soldering and prevents overheating due to a physically limited temperature (max. 260°C). This results in fewer soldering defects and greater process reliability, especially for complex assemblies.

Decorative picture

The maximum temperature corresponds to the boiling point of the medium used and typically ranges between 200 °C and 260 °C. A higher temperature is physically impossible, which makes the process particularly safe. This eliminates the risk of components or substrates overheating.

Decorative picture

The uniformity of the heating is based on the physical principle of condensation. Every point on the assembly that is cooler than the vapour automatically absorbs the same amount of energy. This results in a homogeneous temperature distribution, regardless of component size, material, or position on the circuit board.

Unlike convective processes, there are no local „hot spots“ or shadowed areas, which significantly improves process quality.

Decorative picture

Overheating is prevented because the temperature is limited by the medium's boiling point. Once this point is reached (max. 260°C), the temperature no longer rises. This ensures that sensitive components are reliably protected.

Decorative picture

Vapour-phase soldering provides more uniform heating and prevents localized overheating. Compared to convection soldering, this results in fewer soldering defects and greater process reliability, especially for complex assemblies.

Decorative picture

Vapour-phase soldering is particularly well-suited for complex assemblies where other methods reach their limits. These include:

  • high-density SMD assembly
  • assemblies with large temperature differences between individual components
  • sensitive components with low thermal tolerance
  • complex multilayer printed circuit boards

Process stability is a key advantage, especially in safety-critical applications.

Decorative picture

Yes, the process is considered energy-efficient because heat is transferred directly through the phase change of the medium. There is no need for complex heating profiles or long preheating phases, as is typical with conventional reflow ovens.

Decorative picture

Vapour-phase soldering is used primarily in industries with high quality and safety requirements. These include, in particular, medical technology, aerospace, defense technology, and the automotive industry.

In these fields, flawless solder joints and reproducible processes are crucial to the functionality and safety of electronic systems. Companies such as IBL-Löttechnik offer specialized solutions and equipment for demanding applications.