Standard Test Data Format

Standard Test Data Format (STDF) is a proprietary file format for semiconductor test information originally developed by Teradyne, but now widely used de facto 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 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.

External links

Specification

• STDF version 4
• STDF version 4

Standards Organizations

• STDF Group
• IEEE Test Technology Standards Group/Committee
• Semiconductor Test Consortium

Information

• Semiconductor Informatics
• C library for processing STDF related data
• Java library for processing STDF related data
• 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
• Yield Analysis software and services provider that supports the STDF specs