PDF Solutions, Inc. provides proprietary software and intellectual property products for integrated circuit (IC) designs, electrical measurement hardware tools, methodologies, and professional services in the United States, Canada, China, Taiwan, France, Germany, Italy, Japan, Korea, and internationally. It offers Exensio software products, which consist of Exensio Yield that collects and stores yield data in an analysis-ready database, which enables product engineers to identify and analyze production yield, performance, reliability, and other issues; Exensio Control that provides failure detection and classification capabilities for monitoring, alarming, and controlling manufacturing tool sets; Exensio characterization software, designed to analyze the measurements collected from design-for-inspection (DFI) on-chip instruments using the eProbe tool; Exensio Test that offers data collection and analysis capability; and Exensio ALPS that provides device manufacturers with the capabilit