--- title: "MPF Blog | Engineering Insights & Product News" canonicalUrl: "https://mpfpi.com/blog/" excerpt: "Welcome to the MPF Blog" metaDescription: "News and updates from MPF" datePublished: "2024-04-16T17:32:52-04:00" dateModified: "2026-03-13T14:41:15-04:00" --- MPF Blog | Engineering Insights & Product News # Welcome to the MPF Blog Find posts about new products, recently completed projects, and UHV Viewports, Electrical Feedthroughs as it pertains to Ultra-High Vacuum Systems. ### [The Hidden Infrastructure of Advanced Science](https://mpfpi.com/blog/the-hidden-infrastructure-of-advanced-science/) How Vacuum Engineering Powers the Technologies That Shape Our World There is a category of engineering that makes nearly everything we consider technologically advanced possible – and receives almost none of the credit for it. It does not have a flashy name. It does not generate breathless headlines. When a [Read More »](https://mpfpi.com/blog/the-hidden-infrastructure-of-advanced-science/) ### [The Difference Between High and Ultra-High Vacuum](https://mpfpi.com/blog/the-difference-between-high-and-ultra-high-vacuum/) People use the word “vacuum” as if it describes a single condition. It does not. Vacuum exists on a spectrum – a very wide one – and the difference between one end and the other is not a matter of degree. It is a matter of the physics involved, the [Read More »](https://mpfpi.com/blog/the-difference-between-high-and-ultra-high-vacuum/) ### [What Is UHV and What Industries Use It?](https://mpfpi.com/blog/what-is-uhv-and-industries-that-use-it/) Ultra-high vacuum (UHV) refers to a pressure regime at or below approximately 10⁻⁹ torr (~1.3×10⁻⁹ mbar). At these pressures, gas-surface interactions and trace leak paths dominate system behavior more than bulk gas flow does. UHV is used in semiconductor manufacturing, surface science, synchrotron beamlines, electron microscopy, quantum and cryogenic platforms, [Read More »](https://mpfpi.com/blog/what-is-uhv-and-industries-that-use-it/) ### [ConFlat (CF) Flange vs. KF/NW: Key Differences Explained](https://mpfpi.com/blog/cf-flange-vs-kf-nw-comparison/) ConFlat (CF) flanges use a copper gasket that is cold-welded between two stainless steel knife edges, creating a true metal-to-metal hermetic seal capable of achieving system pressures below 10⁻¹² torr and helium leak rates of 10⁻¹³ torr·L/s or better. KF (Klein Flange, also called NW or ISO-KF) flanges use an [Read More »](https://mpfpi.com/blog/cf-flange-vs-kf-nw-comparison/) ### [Ceramic vs. Glass-to-Metal Seals: Choosing the Right Hermetic Join](https://mpfpi.com/blog/ceramic-vs-glass-to-metal-seals/) Ceramic-to-metal seals (typically alumina brazed to Kovar or stainless steel) offer superior mechanical strength, higher temperature capability, and better resistance to thermal cycling than glass-to-metal seals. Glass-to-metal seals (borosilicate or matched glasses bonded to Kovar or other alloys) are less expensive, well-characterized electrically, and adequate for moderate-temperature and pressure environments. [Read More »](https://mpfpi.com/blog/ceramic-vs-glass-to-metal-seals/) ### [CF vs. KF: A Practical Decision Guide for Vacuum System Designers](https://mpfpi.com/blog/cf-vs-kf-vacuum-flange-decision-guide/) Direct Answer Choose CF flanges when your system must reach pressures at or below 10⁻⁷ torr, requires bakeout above 150°C, or must meet a helium leak-rate specification at or below 1×10⁻⁹ atm·cc/sec. Choose KF flanges for rough vacuum, high vacuum up to about 10⁻⁷ torr, and any connection that benefits [Read More »](https://mpfpi.com/blog/cf-vs-kf-vacuum-flange-decision-guide/) ### [UHV Feedthroughs in Semiconductor Manufacturing](https://mpfpi.com/blog/uhv-feedthroughs-semiconductor-manufacturing/) Semiconductor process tools – including PVD, ALD, CVD, ion implantation, and advanced etch systems – use UHV or near-UHV conditions to minimize surface contamination and improve film purity. Hermetic feedthroughs carry electrical power, RF signals, thermocouples, and motion actuators through chamber walls without introducing leak paths. Selecting feedthroughs with the [Read More »](https://mpfpi.com/blog/uhv-feedthroughs-semiconductor-manufacturing/) ### [Hermetic Feedthroughs for Space and Satellite Applications](https://mpfpi.com/blog/hermetic-feedthroughs-space-satellite/) Space and satellite hardware uses hermetic feedthroughs to pass electrical power, signals, RF, and fiber optic lines through pressure boundaries – between pressurized electronics enclosures and vacuum, or through thermal-vacuum test chamber walls. Space-grade feedthroughs must survive launch vibration, radiation exposure, thermal cycling from cryogenic to high temperatures, and indefinite [Read More »](https://mpfpi.com/blog/hermetic-feedthroughs-space-satellite/) ### [Vacuum Components for Synchrotrons and Particle Accelerators](https://mpfpi.com/blog/vacuum-components-synchrotrons-particle-accelerators/) Synchrotrons and particle accelerators require UHV conditions throughout their beam paths so that charged particles or photon beams travel with minimal gas scattering, charge buildup, and beam-gas interaction. CF flanges with copper gaskets, hermetic instrumentation feedthroughs, UHV viewports, and ceramic vacuum chambers are the primary vacuum components used in these [Read More »](https://mpfpi.com/blog/vacuum-components-synchrotrons-particle-accelerators/)