Ferrofluid seal performance in thin film deposition systems

The role of vacuum seals in deposition processes

In semiconductor manufacturing, vacuum seals are required for several processes. Industry reports note their specific function in both Chemical Vapor Deposition (CVD) and Physical Vapor Deposition (PVD). For CVD, seals maintain a vacuum in the reaction chamber. This allows a thin film to form uniformly on a wafer. The seals also enable the rotation of the wafer inside the chamber. In PVD processes, the seals perform a similar function. They are used to maintain the controlled environment needed for precise thin film deposition.

Addressing high-temperature operational challenges

Application scope and system integration

The use of these seals extends beyond basic semiconductor wafer processing. Documented application areas include single-crystal silicon furnaces, where they preserve vacuum integrity in high-temperature processes. They are also integrated into systems for Flat Panel Display (FPD) production, supporting contamination-free processes for display manufacturing. Within deposition systems, they are often a component of rotating, height-adjustable, and tilt-adjustable substrate holders. This mechanical flexibility is necessary for innovative fabrication of thin films used in solar cells, batteries, and microelectronic devices.