STDF, short for Standard Test Data Format, is a standard file format used to store and exchange test data in the semiconductor industry. STDF files are structured in a hierarchical format, with each record type containing specific information about the test data. The format is designed to be flexible and extensible, so new record types can be added as needed.
This format is supported by most of the Automatic Test Equipment (ATE) vendors and is widely used in the semiconductor industry as it allows data exchange between different tools, machines and labs.
It is an efficient format to store and transfer large amounts of data and it's also useful for post-processing and analysis of test data by yield management teams, process engineers and other people who are responsible for the quality and yield of the semiconductor manufacturing process.