Used Keysight Test System P9001A

This is a "Massively Parallel Parametric Test System" from Keysight, designed for wafer-level process parameter verification. It measures fundamental electrical characteristics—such as a transistor’s threshold voltage ($V_{th}$) and drain current ($I_{ds}$)—rather than determining whether a chip is "functional."

Core Positioning: It serves as a high-throughput, parallel-capable upgrade to the Keysight 4080 series, specifically engineered for large-scale process monitoring in advanced logic and memory wafer fabs. According to Keysight, it offers the industry’s highest parallel measurement capacity, delivers faster single-parameter measurement speeds than the 4080, and maintains strong data correlation with the 4080, facilitating a seamless transition for existing users.

Key Specifications: The system features up to 100 measurement pins, each functioning as a fully independent parametric test unit capable of performing essential measurements—including voltage, current, capacitance, pulses, and frequency. It offers a minimum current measurement resolution of 0.1 fA and a minimum voltage resolution of 2 µV, with full support for CV (capacitance-voltage) measurements.

Architectural Features: Unlike traditional architectures that rely on shared resources and sequential polling, this system employs an independent measurement module for every pin—the hardware foundation that enables massive parallelism. The software is built on the SPECS platform, enhanced for parallel testing; it supports both synchronous and asynchronous parallel modes, allowing for flexible configuration of parallel test plans. Keysight states that this platform has already been validated by leading logic foundries and memory manufacturers.

In short, the P9001A is a parametric test platform from Keysight that utilizes a "100-pin, fully parallel" strategy to overcome throughput bottlenecks in advanced-node process monitoring.