The thermal challenge in vacuum microscopy
In electron microscopy, particularly with scanning (SEM) and transmission (TEM) electron microscopes, maintaining ultra-high vacuum is necessary for clear imaging and system integrity. A component often under thermal stress is the rotary feedthrough, which provides motion for sample stages. These feedthroughs encounter heat from friction and external sources. This creates a need for designs that manage heat without compromising the vacuum seal.
Industry trends toward accessibility and customization
The market for electron microscopes used in semiconductor applications is growing at a compound annual rate of 8%. A parallel trend involves making these powerful tools more accessible. Technological innovation aimed at cost reduction is leading to the development of compact electron microscopes. These smaller devices allow more institutions to perform high-resolution inspections without large, expensive setups. This move toward miniaturization places different demands on component suppliers, who must often provide custom-engineered solutions based on detailed customer specifications, from prototyping to mass production.
Applications expanding into new areas
Electron microscope applications continue to broaden, which affects component requirements. For instance, some manufacturers have begun applying low-vacuum tabletop SEMs to pathological diagnosis. The ease of handling these systems could help reduce burdens on medical institutions. The COVID-19 pandemic that began in 2020 reaffirmed the need for rapid diagnostic tools. In other areas, advanced microscopy and data analytics are being used to accelerate innovation in lithium-ion battery development and sustainable manufacturing processes.
Engineering for multi-axis precision
For complex sample manipulation, a single rotary axis is insufficient. A tri-axle ferrofluid feedthrough provides three independent axes of motion within a single vacuum boundary. This design is useful for tilting, rotating, and translating samples under the electron beam with high precision. The magnetic fluid seal maintains vacuum integrity across all three rotating shafts, a requirement for the ultra-high vacuum environments in advanced TEM and SEM systems. We provide related feedthrough products designed for these demanding applications.