Standard Test Data Format (STDF) is a proprietary file format for semiconductor test information originally developed by Teradyne, but it is now a de facto standard widely used throughout the semiconductor industry. It is a commonly used format produced by automatic test equipment (ATE) platforms from companies such as Cohu, Roos Instruments, Teradyne, Advantest, and others. STDF is a binary format, but can be converted either to an ASCII format known as ATDF or to a tab delimited text file. Decoding the STDF variable length binary field data format to extract ASCII text is non-trivial as it involves a detailed comprehension of the STDF specification, the current (2007) version 4 specification being over 100 pages in length. Software tools exist for processing STDF generated files and performing statistical analysis on a population of tested devices. References External links Specification STDF Version 4 specification Standards developing organizations IEEE Test Technology Standards Group/Committee External libraries C library for processing STDF related data Java library for processing STDF related data .NET library from reading and writing STDF files LabVIEW library for processing STDF related data Python module under active development Python module to process STDF files (only STDFv4 format) Python module to process STDF files (both STDFv3 and STDFv4 format) R based open source data analysis tool for STDF and other ATE formatted data JavaScript package to process STDF files Additional links STDF resources STDF Viewer/Editor (commercial software) Computer file formats Hardware testing file formats