H HermiCore HermiCore Technology Co., Ltd.
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HIGH-PERFORMANCE CERAMIC-METAL SEALING

Ceramic-Metal Sealing & UHV Components for
Semiconductor and Vacuum Equipment

HermiCore designs and manufactures ceramic feedthroughs, ceramic-to-metal seals, metallized alumina ceramics, UHV components and bellows — trusted by high-tech industrial customers in the United States, Europe, Japan and Korea.

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9+Product Series
66+Standard Models
1000+Custom Solutions
100%Helium Leak Tested
Ceramic vacuum feedthrough 8 kV
Product Series

Product Series

A complete range of vacuum feedthroughs, metallized ceramics, precision ceramics and UHV components — with custom engineering available.

8 models
Power Feedthroughs

Power Feedthroughs

1 kV to 30 kV DC power feedthroughs with ceramic vacuum seals, CF / KF flanges for ultra-high-vacuum systems.

View series → 10 models
Multipin Connectors

Multipin Connectors

MIL-Spec MS series, USB and SUB-D multipin feedthroughs with gold-plated pins and UHV hermetic seals.

View series → 16 models
Coaxial Feedthroughs

Coaxial Feedthroughs

BNC, MHV, N, SHV, SMA and SMB 50 Ω coaxial feedthroughs up to 20 kV, transmission to 1 GHz.

View series → 3 models
Ceramic Breaks

Ceramic Breaks

10 kV / 30 kV / 50 kV ceramic breaks with gold-plated conductors for electrical isolation in vacuum lines.

View series → 2 models
Thermocouple Feedthroughs

Thermocouple Feedthroughs

Type C (0–2320 °C) and Type K (–200–1200 °C) thermocouple feedthroughs, 1 to 4 pairs.

View series → 2 models
UHV Viewports

UHV Viewports

Fused silica and sapphire viewports, 180–5000 nm transmission, custom AR coatings available.

View series → 12 models
Metallized Ceramics

Metallized Ceramics

Thick-film, thin-film and active metallization for 95–99.7% alumina, AlN, beryllia, sapphire and more.

View series → 2 models
Precision Ceramic Series

Precision Ceramic Series

Alumina, AlN and zirconia precision ceramics, CNC machined to ±0.01 mm tolerances.

View series → 11 models
UHV Components

UHV Components

Ceramic-to-metal brazed assemblies for photomultipliers, TWTs, microwave tubes, X-ray systems and more.

View series →
Why HermiCore

Engineering Advantages

Full in-house process chain — from ceramic powder forming to finished vacuum components.

Full In-House Process

Ceramic forming → sintering → precision machining → metallization → brazing → vacuum treatment → inspection.

Ultra-High Vacuum Integrity

Ceramic-to-metal seals leak tested to < 1×10⁻¹⁰ mbar·l/s, helium mass spectrometry on every part.

High-Precision Machining

CNC grinding, turning and milling to ±0.01 mm tolerances with N2/N3 surface finishes.

Global Custom Engineering

Non-standard designs, fast prototyping and responsive support for overseas customers.

Featured Products

Featured Products

Power feedthroughs from 1 kV to 30 kV, coaxial and multipin connectors, viewports, ceramic breaks and more.

Power Feedthroughs 8 kV Power Feedthrough

8 kV Power FeedthroughCompliance Power Feedthrough 8kV

8 kV DC power feedthrough rated up to 800 A for high-power vacuum systems.

DY-8Details →
Coaxial Feedthroughs BNC-01 Coaxial Feedthrough

BNC-01 Coaxial FeedthroughBNC Coaxial Feedthrough (Grounding Shield)

50 Ω BNC coaxial feedthrough, single-face grounding shield, Kovar conductor.

BNC-01Details →
Coaxial Feedthroughs SHV-20-1 Coaxial Feedthrough

SHV-20-1 Coaxial FeedthroughSHV-20 Coaxial Feedthrough (Grounded Shield)

20 kV high-voltage coaxial feedthrough, single-face grounding shield, nickel conductor.

SHV-20-1Details →
Ceramic Breaks Ceramic Break 30 kV

Ceramic Break 30 kVCeramic Break, 30 kV Isolation

30 kV ceramic break with extended creepage distance for high-voltage isolation.

GLQ-30Details →
Thermocouple Feedthroughs Type K Thermocouple Feedthrough

Type K Thermocouple FeedthroughThermocouple Feedthrough, Type K

Type K (NiCr-NiSi) thermocouple feedthrough, -200 to 1200 °C, 1 to 4 pairs.

RDO-K-00Details →
UHV Viewports Sapphire Viewport

Sapphire ViewportSapphire Viewport

Sapphire viewport, 180–5000 nm transmission, high-temperature and corrosion resistant.

LBS-01Details →
Metallized Ceramics Metallized Ceramic 2

Metallized Ceramic 2Metallized Alumina Ceramic 2

High-density metallized ceramic substrates with excellent flatness.

MC-002Details →
UHV Components UHV Component 1

UHV Component 1UHV Ceramic-Metal Brazed Component 1

Brazed assemblies for travelling wave tubes and microwave tubes.

UHV-001Details →
View All 66 Products →
Application Fields

Application Fields

Our components support industrial equipment, vacuum physics, semiconductors, medical devices, aerospace, high-temperature technology and energy.

Semiconductor Equipment

Etch, deposition (CVD/PVD), ion implantation and wafer inspection tools using our vacuum feedthroughs and insulators.

Vacuum Physics & Research

UHV systems, large-scale scientific facilities and particle accelerators.

Electron Beam & X-Ray

E-beam welders, X-ray tubes and system components.

Microwave & Vacuum Tubes

Travelling wave tubes, microwave tubes and klystrons.

Aerospace

Avionics and satellite payloads needing high-temperature, high-voltage insulation.

Medical Devices

Imaging systems and particle therapy equipment.

More Applications →
Manufacturing

Facility & Inspection

A full production line from ceramic forming to vacuum components, with dedicated inspection equipment and personnel.

Workshop Overview
Workshop Overview — click to enlarge
Machining Equipment
Machining Equipment — click to enlarge
Inspection Equipment
Inspection Equipment — click to enlarge
Technical Insights

Engineering Knowledge

Practical articles on ceramic-to-metal sealing, feedthrough selection, metallization and vacuum materials.

All Articles →

Need Custom Ceramic-to-Metal Components?

From standard feedthroughs to fully custom brazed assemblies, our engineering team responds quickly to help you define product structure and specifications.

Contact Us Today →