Hermetic Feedthroughs for Electrical and Vacuum Applications

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Purpose of Hermetic Feedthroughs

Hermetic feedthroughs allow electrical current or signals to pass into or out of sealed or vacuum systems while maintaining airtight integrity. Terms such as vacuum feedthroughs, electrical feedthroughs, glass feedthroughs, and ceramic feedthroughs are often used interchangeably, but all serve the same critical function.

Multi-Pin and Bulkhead Designs

Multi-pin hermetic feedthroughs and electrical bulkhead feedthroughs route multiple electrical connections through a single flange-mounted bulkhead. This reduces enclosure penetrations, improves system reliability, and simplifies system architecture. Contacts may be laser-welded or solder-in depending on electrical load and mechanical requirements.

Extreme-Environment Reliability

Hermetic feedthroughs are engineered to withstand high pressure, vacuum, vibration, and thermal extremes. Materials such as Kovar, stainless steel, titanium, and ceramic insulators provide durability and electrical isolation in harsh conditions.

Electrical Safety and Longevity

Feedthroughs also act as a safety barrier, preventing arcing and leakage in high-voltage systems. Proper spacing, insulation thickness, and material selection ensure long-term electrical continuity.

Industrial and Medical Uses

Applications include submersible pumps, downhole drilling instrumentation, exploratory equipment, implantable medical devices, and cryogenic surgical probes.

 

Contact Complete Hermetics

Complete Hermetics manufactures custom glass-to-metal and ceramic-to-metal hermetic feedthroughs, including bulkhead feedthroughs, multi-pin designs, and vacuum-rated configurations. The company also supplies hermetic connectors, headers, and sealed packages to support fully integrated solutions. From design to production, Complete Hermetics delivers reliable feedthrough technology for extreme environments.

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MIL-SPEC Hermetic Connectors

Hermetic Connectors for Aerospace, Medical, and Defense Systems

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Why Hermetic Connectors Matter

Hermetic connectors provide sealed electrical interconnections while maintaining reliable electrical performance under extreme environmental conditions. They prevent moisture, gas, and particulate intrusion that can cause corrosion, insulation failure, or signal loss. These connectors are essential in aerospace, medical, defense, automotive, and industrial systems exposed to vibration, pressure changes, and temperature extremes.

MIL-Spec and Material Options

Many applications require MIL-Spec hermetic connectors, including circle connectors, and rectangular connectors. Materials such as titanium, stainless steel, Kovar, and aluminum are selected for strength, corrosion resistance, and lightweight performance. Titanium hermetic connectors are especially valuable in aerospace and medical systems where weight reduction and biocompatibility are critical.

Design Flexibility and Electrical Performance

Hermetic connectors can be configured for solder-in or laser-weld installation, high-density pin layouts, EMI shielding, and high-voltage or high-frequency operation. Glass-to-metal and ceramic-to-metal sealing technologies ensure long-term hermeticity even under mechanical shock and repeated thermal cycling.

System Integration and Longevity

Beyond environmental sealing, hermetic connectors support long-term system reliability by maintaining stable contact resistance and alignment. They reduce intermittent faults, minimize maintenance risk, and extend service life in systems where repair access is limited or impossible.

Mission-Critical Applications

Hermetic connectors are widely used in satellites, avionics, implantable medical devices, unmanned systems, and defense electronics.

Contact Complete Hermetics

Complete Hermetics is a custom manufacturer of hermetic connectors, glass-to-metal seals, ceramic-to-metal seals,  and hermetically sealed packages for demanding applications. The company also provides custom connector designs, battery end seals, TO headers,  and vacuum feedthrough solutions to meet specialized requirements. With precision engineering and flexible production, Complete Hermetics delivers hermetic interconnect solutions customers can trust.

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Hermetic Seals for High-Pressure and Harsh Environments

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What Are Hermetic Seals?

Hermetic seals are engineered to create a completely airtight barrier that prevents moisture, gas, and contaminants from entering sensitive electronic or mechanical systems. These seals are essential in applications where even microscopic leakage can cause performance degradation, safety issues, or catastrophic system failure. Industries such as aerospace, defense, medical devices, energy, and offshore drilling rely on hermetic sealing to protect mission-critical components operating in extreme conditions.

High-Pressure and Corrosion Resistance

Unlike conventional gaskets or epoxy-based sealing methods, hermetic seals prevent gas transmission through pressure boundaries. Glass-to-metal seals and ceramic-to-metal seals are the most widely used hermetic technologies because they offer excellent electrical insulation, corrosion resistance, and mechanical strength. These seals are specifically designed to withstand high pressure, vibration, thermal cycling, and chemically aggressive environments.

Materials and Sealing Technologies

Hermetic seals are manufactured using materials such as Kovar, stainless steel, Alloy 52, titanium, and aluminum, selected for controlled thermal expansion and long-term structural stability. Glass and ceramic sealing processes are precisely controlled to prevent cracking during temperature changes. These technologies ensure predictable performance across wide temperature ranges and long service lifetimes.

Lifecycle Reliability and Compliance

Hermetic seals also play a critical role in safety, regulatory compliance, and lifecycle cost reduction. Poor sealing can lead to corrosion, insulation breakdown, or electrical failure. Hermetic seals are commonly validated using helium leak detection, thermal shock testing, and pressure cycling to ensure long-term durability in regulated industries.

Applications Across Industries

Hermetic seals are used in medical implants, aerospace avionics, lithium battery assemblies, semiconductor housings, downhole drilling tools, and high-vacuum systems. They are also increasingly used in automotive and electric vehicle electronics, where moisture resistance and long operational life are essential.

Contact Complete Hermetics

Complete Hermetics is a custom manufacturer of glass-to-metal seals, ceramic-to-metal seals, hermetic connectors, hermetic feedthroughs, hermetic headers, and hermetically sealed packages engineered for extreme environments. In addition to precision sealing solutions, the company offers vacuum feedthroughs, battery end seals, TO headers,  and power packages for aerospace, defense, medical, energy, and telecom applications. From prototype development through full-scale production, Complete Hermetics partners closely with customers to deliver precision-engineered hermetic solutions with unmatched reliability.

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Vacuum Feedthroughs for High-Integrity Sealed Systems

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Why Vacuum Feedthroughs Are Essential

Vacuum feedthroughs allow electrical, optical, fluid, or mechanical transfer into or out of a sealed vacuum chamber without compromising the chamber’s integrity. They are crucial in semiconductor processing equipment, scientific research instruments, aerospace simulation chambers, and industrial high-temperature vacuum furnaces. Even the slightest leak can affect process quality, research accuracy, or equipment performance—making hermetic sealing absolutely essential.

Design Requirements for High-Vacuum Environments

Vacuum feedthroughs require materials that tolerate thermal expansion, pressure gradients, plasma exposure, outgassing, and radiation. Complete Hermetics engineers each feedthrough using precision glass-to-metal or ceramic-to-metal bonds calibrated to maintain ultra-low leak rates under severe operating conditions. These feedthroughs maintain performance from cryogenic to extreme high-temperature environments.

Configurations & Materials

Vacuum, electric, glass, and ceramic feedthroughs—often used interchangeably—serve the same core purpose: to route electrical current into or out of a hermetic or vacuum system while preventing any gas leakage. Complete Hermetics designs and manufactures custom glass-to-metal and ceramic-to-metal feedthroughs, including multi-pin and bulkhead hermetic feedthroughs that provide multiple electrical paths through a single flange. Available in laser-weld or solder-in styles, these feedthroughs deliver reliable performance in harsh environments. They are widely used in submersible pumps, downhole drilling tools, exploration instruments, implantable medical devices, and cryogenic surgical probes, where stable electrical continuity and long-term hermeticity are mission-critical.

Applications in High-Tech Sectors

Vacuum feedthroughs support:

  • Plasma etching & PVD/CVD semiconductor tools
  • Space environment simulation chambers
  • Ion beam accelerators & laboratory research equipment
  • Industrial furnaces & metallurgical processing
  • Aerospace test stands requiring high vacuum integrity

Testing & Verification

Every feedthrough undergoes low-helium-leak testing, electrical resistance measurement, thermal cycling, and long-duration vacuum compatibility validation. These processes guarantee reliability in systems where contamination or pressure loss cannot be tolerated.

Contact Complete Hermetics Today for Your Hermetic Solutions

Complete Hermetics provides high-performance vacuum feedthroughs and hermetic sealing technologies. From glass-to-metal or ceramic-to-metal configurations, each feedthrough is engineered with exacting precision to meet your application requirements.

Semiconductor Hermetic Packages for Precision Microelectronics

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Hermetic Packages Engineered for Demanding Environments

Complete Hermetics manufactures a full range of hermetic microwave, hybrid, power, photonic, and telecom packages designed for high-reliability applications in defense, aerospace, energy, medical, and advanced electronics industries. These hermetically sealed microelectronic enclosures are used in mission-critical environments where extreme temperature, vibration, pressure differentials, radiation, and chemical exposure can compromise sensitive semiconductor devices. Each package is engineered to protect internal circuitry, maintain signal integrity, and ensure decades of stable performance in harsh operating conditions.

Microwave and Hybrid Hermetic Packages

For RF, microwave, and millimeter-wave systems, Complete Hermetics produces precision hermetic microwave and hybrid packages compliant with MIL-883, MIL-PRF-38354, and JEDEC-9C standards. These packages incorporate customized feedthrough diameter combinations to meet complex impedance requirements, ensuring high-frequency stability and low-loss performance. Typical constructions include glass-to-metal seals, ceramic-to-metal seals, bent leads, and GPO connectors. Housing materials such as Kovar, stainless steels, CRS, Alloy 52/46, titanium, and aluminum provide controlled thermal expansion, structural robustness, and high-temperature endurance. Every unit undergoes stringent inspection including helium leak testing to ≤ ATM 1×10-8 cc/sec He, insulation resistance tests, and pin-pull tests to verify mechanical integrity.

High-Power Hermetic Packages for Thermal Demands

Complete Hermetics also manufactures hermetic power packages engineered to support high electrical loads and significant thermal dissipation. Many of these power enclosures utilize copper tungsten, copper molybdenum, and copper heat-spreading materials that effectively manage thermal expansion while allowing the enclosure to dissipate heat efficiently. These packages often incorporate glass feedthroughs, ceramic feedthroughs, and DIL/DIP packages with hermetic glass seals to ensure reliable electrical performance under high voltage and high current. Built to MIL-883/MIL-PRF-38354 specifications, each power package is tested for hermeticity, insulation resistance, pin strength, and dimensional accuracy to guarantee long-term durability in energy systems, aerospace modules, and industrial power equipment.

Photonic, Fiber-Optic, Telecom & Biomedical Hermetic Packages

For optical, telecom, and biomedical applications, Complete Hermetics produces hermetically sealed enclosures used in fiber-optic systems, photonic communication devices, biomedical diagnostics, and high-speed signal modules. These packages are built using durable materials including Kovar, stainless steels, CRS, Alloy 52/46, titanium, and aluminum, offering excellent thermal stability and corrosion resistance. Typical constructions include High-Temperature Co-Fired Ceramics (HTCC), multi-layer ceramic feedthroughs, glass-to-metal seals, and GPO or window-lens packages supporting optical coupling and high-frequency performance. With hermeticity levels of ≤ ATM 1×10-8 cc/sec He, these enclosures maintain optical clarity, electrical isolation, and mechanical precision even in harsh or sterilized environments. Complete Hermetics supports custom prototype development through full mass-production, ensuring tailored solutions for next-generation fiber-optic networks, photonic sensors, and biomedical instrumentation.

Commitment to Engineering Excellence

Across all package types—microwave, hybrid, power, photonic, telecom, and biomedical—Complete Hermetics engineering team works directly with customers to optimize design, material selection, sealing technologies, and testing protocols. Every hermetic package is built with strict process control and complete traceability, ensuring unmatched precision and customer satisfaction for high-performance semiconductor assemblies.

Contact Complete Hermetics:

Choose Complete Hermetics for ultra-reliable semiconductor hermetic packages and other advanced hermetic products engineered for advanced electronic systems.

Titanium headers

Battery End Seals for High-Reliability Power Systems

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Why Battery End Seals Are Critical

Battery end seals ensure airtight, long-term protection in lithium, silver-zinc, and other high-performance battery chemistries. These seals prevent electrolyte leakage, moisture intrusion, internal corrosion, and pressure imbalance—issues that can shorten battery lifespan or cause critical device failures. In aerospace, medical implants, defense equipment, and industrial monitoring systems, battery reliability directly affects user safety and equipment performance. As batteries become smaller and more energy-dense, the importance of robust hermetic sealing continues to increase.

Advanced Glass-to-Metal Technologies for Modern Batteries

Complete Hermetics manufactures glass-to-metal sealed lids and battery end caps designed for high pressure, extreme temperatures, and high-current cycling. Glass-to-metal seals provide strong chemical resistance, electrical insulation, and long-term bonding strength. By pairing controlled-expansion alloys such as Kovar or stainless steel with high-reliability glass, Complete Hermetics ensures a leak-proof interface capable of withstanding decades of use.

Applications Across Mission-Critical Industries

Battery end seals are used in:

  • Implantable medical devices (pacemakers, neurostimulators)
  • Aerospace telemetry and communication modules
  • Military-grade energy storage
  • Extreme-environment sensors & monitoring systems
  • Backup power modules for critical infrastructure

These seals ensure stable electrical output even in the presence of shock, vibration, and rapid thermal cycling.

High-Reliability Testing & Validation

Each battery seal undergoes helium leak testing, electrolyte exposure resistance, temperature cycling, and mechanical stress evaluation. Plating options—such as nickel, gold, or tin—enhance solderability, conductivity, and corrosion protection for long-term reliability.

Contact Complete Hermetics Today

Complete Hermetics delivers safe, durable, and long-lasting battery end seals engineered for high-performance applications. The team also produces advanced battery feedthroughs, glass-to-metal lids, and other reliable custom hermetic products built to withstand demanding environments. With precision manufacturing and proven sealing technologies, every component ensures consistent, long-term reliability.

Advanced Ceramic-to-Metal Seals and Feedthroughs for High-Temperature Performance

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Why Ceramic-to-Metal Seals Are Superior

Ceramic-to-metal seals provide unmatched insulation strength, temperature resistance, and structural durability—making them ideal for systems exposed to extreme conditions. Unlike glass seals, ceramics retain mechanical and electrical stability at temperatures exceeding 500°C and remain intact during rapid thermal cycling. These properties make CTM seals indispensable in aerospace propulsion, medical imaging equipment, semiconductor fabrication tools, and scientific instrumentation.

Material Properties & Bonding Precision

Complete Hermetics uses high-purity alumina ceramics, metalized with tungsten-molybdenum or moly-manganese layers, to enable strong brazed joints with Kovar, titanium, or stainless steel housings. This combination allows ceramic-to-metal seals to achieve extremely low leak rates and high dielectric breakdown voltage. Optional plating—gold, nickel, or silver—improves conductivity, corrosion resistance, and long-term material stability.

Applications Across High-Temperature Industries

Ceramic-to-metal seals are essential in:

  • High-voltage power systems
  • Vacuum and plasma processing equipment
  • RF amplifiers and radar transmitters
  • Aerospace ignition and propulsion assemblies
  • Nuclear diagnostic sensors
  • Industrial heating and furnace control systems

Engineering Collaboration & Testing

Complete Hermetics works closely with engineers to determine ceramic thickness, dielectric spacing, pin configurations, and mounting styles tailored to each application. Every component undergoes helium leak detection, thermal shock testing, vacuum cycling, and electrical qualification to ensure longevity and reliability.

Contact Complete Hermetics

Count on Complete Hermetics for robust, precision-engineered ceramic-to-metal seals and feedthroughs— your trusted partner for extreme-environment reliability.

Hermetically Sealed Packages for Harsh-Environment Electronics

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Purpose of Hermetic Packages

Hermetically sealed packages protect sensitive microelectronics against moisture, contaminants, chemical vapor, radiation, vacuum conditions, and extreme temperature cycles. Without hermetic protection, microchips, sensors, and laser components can suffer from corrosion, outgassing, electrical drift, or catastrophic failure. In aerospace, defense, semiconductor, and medical applications, hermetic packaging ensures long-term performance—even in environments where failure is not an option.

Types of Hermetic Packages Offered

Complete Hermetics manufactures hermetic microwave and hybrid packages for defense, aerospace, energy, and medical applications, delivering rugged microelectronic enclosures engineered for harsh environments where reliability is critical.

Complete Hermetics produces high-reliability hermetic power packages using copper tungsten, copper molybdenum, and copper materials to support high thermal expansion, efficient heat dissipation, and long-term hermetic performance through glass-to-metal or ceramic-to-metal seals.

Complete Hermetics manufactures hermetic packages for photonic, fiber-optic, telecom, and biomedical systems, enabling stable high-speed optical performance and providing fully customized solutions from prototype to production.

Precision Sealing & Manufacturing Process

Hermetic packages are sealed using laser welding, seam sealing, brazing, or glass-to-metal sealing depending on mechanical, thermal, and electrical requirements. Complete Hermetics ensures proper metallization, plating, internal routing, and thermal expansion matching to guarantee structural and environmental reliability. Internal cavities can be customized for chip alignment, lens coupling, fiber-optic feedthroughs, or high-speed signal pathways.

Applications in Demanding Industries

These packages are used in:

  • Satellites and deep-space communications
  • Radar & military electronics
  • Medical diagnostic technology
  • Semiconductor laser drivers
  • Harsh-environment sensor modules
  • High-reliability communication systems

Contact Complete Hermetics:

Choose Complete Hermetics for high-performance hermetically sealed packages engineered for extreme reliability and precision.

Medical Hermetic Seals for Life-Critical Electronic Devices

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Why Hermetic Seals Are Essential

Medical hermetic seals play a critical role in ensuring the safety, reliability, and biocompatibility of implantable and diagnostic electronics. When devices operate inside the human body or are exposed to sterilization processes, they must withstand moisture, bodily fluids, chemical exposure, and extreme thermal variations. Even the smallest leak can cause internal corrosion, signal failure, or biological contamination. As modern medical devices become smaller yet more capable, the demand for advanced hermetic sealing technologies grows significantly.

Glass-to-Metal & Ceramic-to-Metal Sealing Technologies

Complete Hermetics designs medical-grade seals using glass-to-metal (GTM) and ceramic-to-metal (CTM) sealing methods. Glass seals provide cost-effective, high-strength bonding between metal housings and conductive pins, while ceramic seals are ideal for high-voltage or long-term implants due to their exceptional dielectric strength. Using materials such as titanium, stainless steel, and high-purity alumina ceramics, these seals are engineered to perform reliably in demanding biological environments.

Regulatory-Ready Testing & Biological Safety

Medical hermetic seals must meet FDA, ISO 14708, IEC 60601, and biocompatibility standards. Complete Hermetics performs rigorous testing—including helium leak detection, sterilization simulation, thermal shock, electrical insulation analysis, and X-ray inspection—to ensure every seal meets life-critical reliability requirements. Traceability, cleanliness, and manufacturing consistency are maintained at every step.

Applications in Modern Healthcare

Medical hermetic seals enable secure operation in:

  • Pacemakers & implantable cardioverter defibrillators (ICDs)
  • Neurostimulation & pain-management implants
  • Implantable batteries & power modules
  • Surgical navigation tools
  • Diagnostic imaging equipment
  • Long-term biosensor implants

Contact Complete Hermetics

For precision-engineered medical hermetic seals that support life-critical technology, trust the expertise of Complete Hermetics.

Hermetic Bulkhead Feedthroughs for Secure System Penetrations

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What Are Bulkhead Feedthroughs?

Hermetic bulkhead feedthroughs are specialized sealing components that permit electrical conductors to pass through pressure boundaries while maintaining an absolute airtight separation between two environments. These components are essential for systems where internal integrity must not be compromised—such as vacuum chambers, propulsion systems, laboratory reactors, marine equipment, and industrial process vessels.

How Bulkhead Feedthroughs Maintain Integrity

Bulkhead feedthroughs must withstand intense mechanical stress, extreme temperatures, pressure cycling, chemicals, radiation, and vibration. Complete Hermetics engineers these feedthroughs using robust glass-to-metal and ceramic-to-metal sealing technologies that ensure leak rates as low as 1×10-8 cc/sec. These seals resist cracking, corrosion, and long-term fatigue.

Configuration & Mounting Options

Vacuum, electric, glass, and ceramic feedthroughs—terms often used interchangeably—serve the essential function of carrying electrical current into or out of a hermetic or vacuum system while maintaining an airtight seal. Complete Hermetics designs and manufactures custom glass-to-metal and ceramic-to-metal feedthroughs engineered to prevent gas transmission through pressure barriers.

The company also produces multi-pin hermetic feedthroughs and bulkhead electrical feedthroughs, which route multiple electrical paths through a single flange-mounted bulkhead. Available in laser-weld or solder-in configurations, these feedthroughs are built for extreme environments. They are used in submersible pumps, downhole drilling tools, exploration devices, implantable medical systems, and cryogenic surgical probes, where long-term electrical continuity and hermetic integrity are essential.

Industry Applications

Bulkhead feedthroughs are widely used in:

  • Aerospace propulsion and environmental testing
  • Subsea robotics & marine exploration vessels
  • Cleanroom vacuum chambers & semiconductor tools
  • High-pressure reactors and cryogenic systems
  • Defense-grade electronics and hardened enclosures

Material Strength & Long-Term Reliability

Using premium alloys such as titanium, Inconel, Kovar, and stainless steel, Complete Hermetics ensures mechanical stability under prolonged operational stress. Ceramic insulators and precision plating improve voltage tolerance and corrosion resistance.

Contact Complete Hermetics

For durable, precision-engineered hermetic bulkhead feedthroughs, trust the proven expertise of Complete Hermetics.

Contact Form: https://www.completehermetics.com/contact-us/ | Phone: 714-265-1238 | Email: info@completehermetics.com