Hermetic Package: Internal Pressure 1 atm (sealed)

Q: What is the primary function of a hermetic package in an IMU?

To protect sensitive inertial sensors from moisture, dust, and other contaminants, ensuring accuracy and longevity in demanding environments.

Q: How is hermeticity tested in these packages?

Using methods like helium leak detection or mass spectrometry to verify leak rates meet industry standards such as MIL-STD-883.

Component Specifications

Definition

A hermetic package is an airtight enclosure designed to protect sensitive electronic components, such as those in a Precision Inertial Measurement Unit (IMU) Sensor Module, from environmental factors including moisture, dust, gases, and mechanical stress. It ensures long-term reliability and performance stability in harsh conditions by maintaining a controlled internal atmosphere.

Working Principle

The hermetic package operates by creating a sealed barrier using materials and joining techniques that prevent the ingress of contaminants. It often involves a combination of metal, ceramic, or glass enclosures with welded, brazed, or glass-to-metal seals to achieve an airtight environment, preserving the integrity of the IMU's internal sensors and electronics.

Materials

Common materials include Kovar alloy, stainless steel, aluminum, ceramics (e.g., alumina), and glass. Seals are typically made via laser welding, resistance welding, or glass-to-metal bonding to ensure hermeticity.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Weight	5-50 grams
Leak Rate	<1x10^-8 atm·cc/sec
Dimensions	Varies by IMU model (e.g., 20mm x 20mm x 10mm)
Internal Pressure	1 atm (sealed)
Operating Temperature	-40°C to +125°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 14644-1, MIL-STD-883, DIN EN 60529

Parent Products

This component is used in the following industrial products

Precision Inertial Measurement Unit (IMU) Sensor Module

The Precision Inertial Measurement Unit (IMU) Sensor Module is a compact, integrated component that combines accelerometers and gyroscopes to measure linear acceleration and angular rate across multiple axes.

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Engineering Analysis

Risks & Mitigation

Seal failure leading to contamination
Thermal expansion mismatch causing cracks
Cost and complexity of manufacturing

FMEA Triads

Trigger: Improper welding or sealing process
Failure: Loss of hermeticity, allowing moisture ingress
Mitigation: Implement strict quality control and testing protocols, such as 100% leak testing.

Trigger: Material fatigue under thermal cycling
Failure: Crack formation in the package
Mitigation: Use materials with matched coefficients of thermal expansion and design for thermal stress relief.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Leak rate tolerance as per MIL-STD-883 Method 1014, with typical limits below 1x10^-8 atm·cc/sec.

Test Method

Helium leak detection per MIL-STD-883, environmental testing per ISO 16750 for automotive or similar standards.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Hermetic Package

Manufacturer profiles associated with Hermetic Package.

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Frequently Asked Questions

What is the primary function of a hermetic package in an IMU?