OK-HSAT Series High-Pressure Steam Autoclave for Accelerated Aging and Hermeticity Testing

Overview

The OK-HSAT Series High-Pressure Steam Autoclave is an engineered thermal-pressurized test chamber designed for accelerated aging, hermeticity validation, and moisture resistance evaluation of electronic components and laminated assemblies. It operates on the principle of saturated steam sterilization and pressure-assisted thermal stress testing—leveraging controlled elevation of temperature and absolute pressure above ambient to accelerate hydrolytic degradation mechanisms in polymer encapsulants, solder mask layers, and die attach materials. Unlike conventional ovens or humidity chambers, the OK-HSAT achieves true saturation conditions by generating steam in a dedicated, isolated steam generator chamber—ensuring uniform thermal transfer without direct steam impingement on test specimens. This architecture minimizes localized thermal shock and mechanical distortion, thereby improving repeatability across qualification cycles per IPC-TM-650 2.6.25, JEDEC JESD22-A108, and IEC 60068-2-66 standards.

Key Features

• Dual-circuit high-temperature solenoid valve system—reduces failure probability through redundancy and independent actuation paths.
• Separate steam generation chamber—prevents turbulent steam entry and ensures laminar, low-velocity vapor delivery into the test chamber.
• Ergonomic cam-lock door mechanism—eliminates torque-intensive rotary handles; enables consistent sealing force with minimal operator effort.
• Two-phase air removal protocol—cold-air purge before pressurization and dynamic air bleed during ramp-up—to maintain stable partial pressure of steam and improve process reproducibility.
• Extended-duty cycle capability—validated for uninterrupted operation up to 400 hours under full-rated pressure and temperature conditions.
• Integrated water-level sensing—real-time monitoring with automatic power cutoff if minimum fill level falls below safe operational threshold.
• Structurally reinforced tank—designed to withstand 2.65 kg/cm² at 140 °C and certified to pass hydrostatic pressure testing at 6 kg/cm² (1.5× design pressure).
• Dual-stage overpressure protection—comprising programmable PID controller limits and fail-safe mechanical pressure relief valve—meeting ASME BPVC Section VIII requirements for Class I pressure vessels.
• Emergency manual vent button—dual-action release lever enabling immediate depressurization in critical fault scenarios.

Sample Compatibility & Compliance

The OK-HSAT accommodates PCBs (single- and multilayer), IC packages (QFP, BGA, CSP), LCD modules, sintered ferrite magnets, and MEMS sensors mounted on carrier trays or racks. Chamber dimensions support standardized sample carriers compliant with IPC-9701 and JEDEC J-STD-020. All models are CE-marked and constructed in accordance with EN 13445-1 (Unfired Pressure Vessels) and ISO 13857 (Safety distances). The system supports GLP-compliant operation via optional audit-trail-enabled controllers (IEC 62304 Class B software architecture), and meets FDA 21 CFR Part 11 requirements when paired with validated data logging firmware.

Software & Data Management

Standard configuration includes a microprocessor-based controller with 7-inch TFT touchscreen interface, real-time graphing, and USB data export. Optional Ethernet-enabled controllers provide remote monitoring, alarm forwarding via SMTP/SNMP, and integration with LIMS or MES platforms. All recorded parameters—including chamber temperature, pressure, elapsed time, and purge status—are timestamped and stored with SHA-256 checksum integrity verification. Raw logs are exportable in CSV/Excel format for statistical process control (SPC) analysis using Minitab or JMP. Firmware updates follow a secure signed-package protocol to ensure traceability and version control.

Applications

This autoclave serves as a primary tool for preconditioning prior to thermal cycling (JEDEC JESD22-A104), pressure cooker testing (PCT), and unbiased HAST (Highly Accelerated Stress Test). It is routinely deployed in reliability labs for evaluating moisture sensitivity levels (MSL) per J-STD-020, assessing delamination resistance in HDI substrates, validating conformal coating integrity, and qualifying lead-free assembly processes. Its precise control over steam saturation eliminates condensation variability—a key factor in correlating lab results with field failure modes in automotive ECUs and aerospace avionics.

FAQ

What standards does the OK-HSAT comply with for pressure vessel safety?

It conforms to EN 13445-1 for unfired pressure equipment and incorporates mechanical safety valves certified to PED 2014/68/EU Category II.

Can the system perform PCT testing per JEDEC JESD22-A110?

Yes—operating at 132 °C and 2.0 kg/cm² (gauge) with 100 % RH satisfies the standard’s mandatory conditions for unbiased PCT.

Is cold-air purge configurable for different material types?

The pre- and mid-cycle purge duration and frequency are fully programmable via the controller interface to accommodate varying thermal mass and outgassing profiles.

How is data integrity ensured during long-duration tests?

Non-volatile memory retention, cyclic redundancy checks (CRC-32) on all logged records, and optional digital signature authentication prevent tampering and support regulatory audit readiness.

Does the unit support automated calibration verification?

Yes—integrated PT100 sensor self-diagnostics and optional NIST-traceable external probe ports enable periodic verification without disassembly.