Standard Test Data Format (STDF) is a proprietary

file format A file format is a Computer standard, standard way that information is encoded for storage in a computer file. It specifies how bits are used to encode information in a digital storage medium. File formats may be either proprietary format, pr ...

for

semiconductor A semiconductor is a material which has an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass. Its resistivity falls as its temperature rises; metals behave in the opposite way. ...

test information originally developed by

Teradyne Teradyne, Inc. is an American automatic test equipment (ATE) designer and manufacturer based in North Reading, Massachusetts. Teradyne's high-profile customers include Samsung, Qualcomm, Intel, Analog Devices, Texas Instruments and IBM. Histor ...

, but it is now a

de facto standard A ''de facto'' standard is a custom or convention that has achieved a dominant position by public acceptance or market forces (for example, by early entrance to the market). is a Latin phrase (literally "in fact"), here meaning "in practice but ...

widely used throughout the semiconductor industry. It is a commonly used format produced by

automatic test equipment Automatic test equipment or automated test equipment (ATE) is any apparatus that performs tests on a device, known as the device under test (DUT), equipment under test (EUT) or unit under test (UUT), using automation to quickly perform measurement ...

(ATE) platforms from companies such as Cohu, Roos Instruments,

Advantest is a Japanese leading manufacturer of automatic test equipment (ATE) for the semiconductor industry, and a manufacturer of measuring instruments used in the design, production and maintenance of electronic systems including fiber optic and w ...

, and others. STDF is a

binary Binary may refer to: Science and technology Mathematics * Binary number, a representation of numbers using only two digits (0 and 1) * Binary function, a function that takes two arguments * Binary operation, a mathematical operation that ta ...

format, but can be converted either to an

ASCII ASCII ( ), abbreviated from American Standard Code for Information Interchange, is a character encoding standard for electronic communication. ASCII codes represent text in computers, telecommunications equipment, and other devices. Because ...

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 Statistical inference is the process of using data analysis to infer properties of an underlying distribution of probability.Upton, G., Cook, I. (2008) ''Oxford Dictionary of Statistics'', OUP. . Inferential statistical analysis infers propertie ...

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 {{tech-stub