Hermetic Feedthroughs: A Comprehensive Overview

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In the hermetic and vacuum-sealed industries, terms such as Vacuum Feedthrough, Electric Feedthrough, Glass-to-Metal Feedthrough, and Ceramic-to-Metal Feedthrough are often used interchangeably. Despite their varied names, these components share a critical function: facilitating the transmission of electrical currents while maintaining an airtight seal.

What Are Hermetic Feedthroughs?
Hermetic feedthroughs are essential in applications requiring strict isolation from environmental contaminants such as air, gas, or moisture. The term “hermetic” refers to the ability to create an airtight barrier, ensuring no gas or liquid leakage. In interconnect systems, hermetic seals and feedthroughs are engineered to prevent the passage of gases through pressure barriers. This technology is crucial in environments where maintaining a vacuum or specific atmospheric conditions is critical, such as aerospace, medical, and industrial applications.

Types of Hermetic Feedthroughs
Complete Hermetics specializes in designing and manufacturing a wide range of feedthroughs, including:

Applications and Durability
Hermetic feedthroughs are built to endure extreme environments. They are extensively used in submersible pumps, downhole drilling instrumentation, cryogenic medical devices, and exploratory implants. Their ability to withstand high pressures ensures consistent performance in critical applications such as surgical instruments and industrial machinery. The laser-welded and soldered designs enhance reliability and functionality across various demanding scenarios.

Complete Hermetics: Your Trusted Partner
Complete Hermetics leads the industry in designing and manufacturing custom hermetic feedthroughs. Their expertise includes prototyping and producing high-quality glass-to-metal and ceramic-to-metal feedthroughs. With a commitment to innovation and reliability, Complete Hermetics delivers solutions optimized for even the harshest conditions, ensuring seamless electrical performance and hermetic integrity.

Optimize your projects with Complete Hermetics‘ state-of-the-art feedthroughs—where precision meets durability.

Custom Hermetic Feedthroughs

What Are Electrical Feedthroughs For?

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You might not think that there are many components that can be found in X-ray machines, transformers and furnaces. But electrical feedthroughs are commonly used in a wide variety of technologies to help make sure that electricity doesn’t escape and cause malfunctions. It is important to know what these feedthroughs are used for and to appreciate this important piece of technology that keeps so many different technologies running.

The Importance of Vacuums 

Creating a vacuum guarantees that the electricity being transported from one part of a machine to another does not get out. Vacuum feedthroughs effectively make sure that the electricity is distributed safely.

Using Seals

The key to creating a vacuum is the type of seal that is used. Hermetic feedthroughs use glass-to-metal seals and ceramic seals to create this vacuum. When building a new seal, it is extremely important that the materials used are able to withstand intensive use and not break down over time.

This is why many seals are made with glass and ceramics; these materials are designed to withstand extreme temperatures, as well as other wear and tear. Many of these seals are used in technology like furnaces that operate at extreme temperatures. Making sure the seals do not break down easily will make sure the machine runs smoothly.

Electrical Feedthroughs

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Maintaining Hermetic Seals With a Glass-to-Metal Bond

It’s hard to imagine that a furnace and x-ray equipment using some of the same technology, but electrical feedthroughs are vital to many different applications which require a hermetic seal with an electrical feedthrough that prevents even the tiniest amount of leakage in the vacuum. When your business needs a prototype that has been tested and retested for your project, Complete Hermetics has the engineers who can make it happen.

For glass-to-metal seals, we heat glass to its molten state, then its wetted to the metal to create the bond. Our production team carefully measures the thermal expansion of the glass to prevent breakage during its use. Glass seals are more resistant to the temperature changes during use than an O-ring or epoxy seal. We can also match the use of the glass-to-metal seal to your electrical feedthrough, making your system more efficient and secure under stringent conditions.

Glass-to-metal seals and electrical feedthroughs can have plating to help them resist corrosion and increase the soldering capabilities. With so many options for the seal, you can get the exact specifications that meet your application. Our engineers specialize in creating hermetic seals and electrical feedthroughs. You know what you need your product to do. Let us help you make it happen by producing the parts that make it work.

Understanding Electrical Feedthroughs

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Glass-to-metal seals are more effective than O-rings and epoxy when it comes to maintaining an hermetic seal. Sometimes, glass isn’t effective at high voltage or high operating temperatures. The solution is a ceramic-to metal seal and electrical feedthrough. Although there is more labor and time involved in creating this type of seal, it will work under harsher conditions than the glass-to-metal seal might.

Our engineers specialize in ceramic-to-metal seals and electrical feedthroughs to match your specifications. We design and develop prototypes and manufacture products which provide a tight seal. Every item is tested and retested to ensure its properties and effectiveness for use. We have multiple options for insulators, conductors, and housing materials to fit the industry in which it will be used. Using the right products makes the difference in the end not only in effectiveness, but in your bottom line.

Electrical feedthroughs are vital to many applications in medical technology, defense, satellites, and optics. Our team has a wide range of knowledge to get the job done right. Together, your developers and ours can make sure your product works like it should every time. You know what you need, but not how to create it. We have the know-how to design and develop the hermetic seal and electric feedthrough to fit your specifications. Let us work with you to make your project move forward by contacting us.