Standard Test Data Format
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Standard Test Data Format (STDF) is a proprietary file format for semiconductor test information originally developed by Teradyne, but now widely used throughout the semiconductor industry. It is a commonly used format produced by Automatic Test Equipment (ATE) platforms from leading companies such as Teradyne, Verigy, LTX, Credence 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 Standard Test Data Format (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.
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