Open-Short Tester (iOST)

Compared with conventional open/short test equipment, iOST is designed to be faster, more accurate and smarter to use — delivering the highest efficiency and quality in semiconductor package testing.

High pin count

Up to 16,384 channels. Thanks to a real-time multiplexing design, even a 16,384-channel system has 50% lower latency than the previous 2,048-channel generation. Each chassis supports up to 2,048 channels (16 CH boards × 128 channels), and LB cables remain fully compatible with the previous system.

High performance

• High precision — every circuit uses new-generation industrial-grade components (OPA, PGA, ADC, DAC…) for better accuracy, higher speed and lower temperature drift.
• High reliability — built-in precision voltage references and smart self-calibration circuitry. A low-power design with fully isolated measurement units keeps data stable even in noisy environments, and one-key self-calibration replaces tedious manual calibration so testing is always correct.
• High speed — iOST keeps the traditional instrument command interface but adds an on-board test program processor that runs all measurements autonomously while the PC analyses results in parallel. Dedicated real-time channel switching keeps signal delay minimal, so even 16,384 channels have very limited impact on OST test time.

Intelligent features

• Auto-learning — simple parameter setup and enhanced algorithms produce more accurate analysis and more complete test conditions, so production can start immediately. Existing test programs remain compatible. Per-channel voltage, current and impedance statistics, together with I-V and V-T curve analysis, help engineers validate and debug test programs faster.
• Full self-diagnostics — the HP16 series includes a dedicated Diag-Board with high-precision, low-drift circuitry for accurate DUT simulation and standard load testing, plus APMU force/measure verification, LB cable impedance checks, CH board leakage checks and diode curve tests to resolve issues quickly during mass production.
• Precision self-calibration — stable references and smart calibration with no trimmer adjustment reduce the effects of temperature, humidity and vibration. The RWC (Read-Write-Click) procedure is simple: connect a certified precision DMM, read the voltage, write it into the software console and click Calibrate — done automatically within 10 seconds.
• Yield analysis — use the built-in V / I / R tools for static per-channel testing, or dynamic I-V and V-T curves for failure analysis. Yield and fault statistics are presented as tables and charts so process issues surface quickly.

Specifications