Hermetic Reliability
Hermetic sealing is more than joining ceramic and metal—it is about maintaining vacuum integrity, electrical isolation, and long-term reliability throughout the product’s service life. Meetcera manufactures hermetic ceramic-to-metal assemblies designed for applications where even microscopic leakage is unacceptable.
Why Hermetic Sealing Matters?
Even an extremely small leak can allow moisture, gases, or contaminants to enter a sealed package, leading to insulation failure, corrosion, sensor drift, or premature device failure. Hermetic sealing prevents environmental ingress and protects sensitive electronic and vacuum systems throughout their operating life.
Hermetic Performance Capabilities
| Capability | Typical Value |
|---|---|
| Leak Rate | ≤1×10-10 atm.cc/sec |
| Hermetic Lifetime | 20+ Years（The actual lifespan is related to the operating conditions.） |
| Operating Temperature | -55°C to 500°C |
| Thermal Cycling | Available |
| Pressure Resistance | Custom |
| Electrical Isolation | Excellent |
Every assembly is engineered to maintain hermetic performance under demanding thermal, electrical, and mechanical operating conditions.
Engineering Considerations for Reliable Hermetic Sealing
Reliable hermetic sealing depends on proper engineering, not just manufacturing. Optimized materials, joint design, operating conditions, and testing all contribute to long-term sealing performance.
Material Compatibility
Mismatched materials can create thermal stress and reduce seal reliability.
Matching ceramic and metal materials helps maintain long-term hermetic performance.
Joint Design
Poor joint geometry may lead to localized stress and leakage.
A well-designed joint improves mechanical strength and seal integrity.
Operating Environment
Harsh environments place higher demands on hermetic assemblies.
Designing for vacuum, temperature, and humidity improves long-term reliability.
Seal Verification
Reliable sealing should always be verified.
Helium leak testing and inspection confirm consistent hermetic performance before delivery.
Quality Standards
| Test | Standard |
|---|---|
| Helium Leak Test | MIL-STD-883 |
| Hermeticity | MIL-STD-750 |
| Brazing | AWS |
| Ceramic Materials | ASTM |
