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'''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 [[LTX-CredenceCohu]], [[Roos Instruments]], [[Teradyne]], [[Advantest]], SPEA S.p.A, and others.
STDF is a [[binary file|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 [[device under test|tested devices]].
[http://www.kanwoda.com/wp-content/uploads/2015/05/std-spec.pdf Reference: STDF Specifications V4]
== External links ==
=== Specification ===
* [http://etidweb.tamu.edu/cdrom0/image/stdf/spec.pdf STDF version 4]
* [http://casey.marshall.googlepages.com/stdfv4-spec.pdf STDF version 4]
=== Standards developing organizations ===
* [http://grouper.ieee.org/groups/ttsg/ IEEE Test Technology Standards Group/Committee]
* [http://www.semi.org/IndustrySegments/Test/CAST/ SEMI Collaborative Alliance for Semiconductor Test (CAST)]
=== External links ===
* [http://freestdf.sourceforge.net/ C library for processing STDF related data]
* [http://code.google.com/p/stdf4j/ Java library for processing STDF related data]
* [https://linqtostdf.codeplex.com/ .NET library from reading and writing STDF files]
* [http://decibel.ni.com/content/docs/DOC-15174 LabVIEW library for processing STDF related data]
* [http://code.google.com/p/pystdf/ Python module to process STDF files (only STDFv4 format)]
* [http://code.google.com/p/stdfparser/ Python module to process STDF files (both STDFv3 and STDFv4 format)]
* [http://stdf.radar.googlepages.com/ R based open source data analysis tool for STDF and other ATE formatted data]
* [https://sites.google.com/a/informatic-solutions-llc.com/informatic-solutions-llc/home/semiconductor-informatics/standard-test-data-format-stdf/ Perl programs to manipulate STDF, ATDF, and XTDF files.]
[[Category:Computer file formats]]
[[Category:Hardware testing file formats]]
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