公开(公告)号：US20250027982A1

公开(公告)日：2025-01-23

申请号：US18355395

申请日：2023-07-19

Applicant: ADVANTEST CORPORATION

Inventor： Yang SHANG ,  Masaichi HASHIMOTO ,  Makoto SHINOHARA

IPC: G01R31/11

Abstract: A method, apparatus, and/or system for soft defects modeling of measurements using time-domain reflectometry. Electro-Optic Sampling based Time-Domain Reflectometry (EOS-TDR) may quickly detect soft defects in a chip under test. For example, EOS-TDR may detect soft defects in each pin from a trace-structure point at a relatively high resolution. To interpret the results in a time sensitive manner, a reference model for chips may be established from chips that are known to have met the expected quality standards. Through automated analysis of the features of the device under test waveform, soft defects of a chip may be detected that would be otherwise undetectable under time constraints, temperature variations, applied current variations, applied voltage variations, vibration variations, moisture variations, or any other kind of possible variation.