Standard Test Data Format
Encyclopedia
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 LTX - Credence Corporation
, Roos Instruments
, Teradyne
, Verigy
, 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
.
File format
A file format is a particular way that information is encoded for storage in a computer file.Since a disk drive, or indeed any computer storage, can store only bits, the computer must have some way of converting information to 0s and 1s and vice-versa. There are different kinds of formats for...
for semiconductor
Semiconductor
A semiconductor is a material with electrical conductivity due to electron flow intermediate in magnitude between that of a conductor and an insulator. This means a conductivity roughly in the range of 103 to 10−8 siemens per centimeter...
test information originally developed by Teradyne
Teradyne
Teradyne , a US company, is a supplier of automatic test equipment . The company's divisions Semiconductor Test and Systems Test Group, are organized by the products they develop and deliver.-History:...
, but now widely used de facto
De facto standard
A de facto standard is a custom, convention, product, or system that has achieved a dominant position by public acceptance or market forces...
throughout the semiconductor industry. It is a commonly used format produced by Automatic Test Equipment
Automatic test equipment
Automatic or Automated Test Equipment is any apparatus that performs tests on a device, known as the Device Under Test , using automation to quickly perform measurements and evaluate the test results...
(ATE) platforms from leading companies such as LTX - Credence Corporation
LTX-Credence Corporation
LTX-Credence Corporation is the result of a merger of LTX and Credence Systems Corporation in 2008. LTX-Credence manufactures Automatic Test Equipment for the semiconductor industry.-Competitors:LTX-Credence's principal competitors are:...
, Roos Instruments
Roos Instruments
Roos Instruments is a semiconductor Automatic Test Equipment vendor founded in 1989 from a DARPA Small Business Innovation Research grant. RI specializes in highly automated test development tools that simplify the complexities of designing procedures that correctly determine if the Device Under...
, Teradyne
Teradyne
Teradyne , a US company, is a supplier of automatic test equipment . The company's divisions Semiconductor Test and Systems Test Group, are organized by the products they develop and deliver.-History:...
, Verigy
Verigy
Verigy Ltd is an Advantest Group company in the semiconductor automatic test equipment business. It was spun off from Agilent Technologies in 2006...
, and others.
STDF is a binary
Binary file
A binary file is a computer file which may contain any type of data, encoded in binary form for computer storage and processing purposes; for example, computer document files containing formatted text...
format, but can be converted either to an ASCII
ASCII
The American Standard Code for Information Interchange is a character-encoding scheme based on the ordering of the English alphabet. ASCII codes represent text in computers, communications equipment, and other devices that use text...
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
Device under test
Device under test , also known as unit under test , is a term commonly used to refer to a manufactured product undergoing testing.-In semiconductor testing:...
.
Specification
Standards Organizations
Information
- C library for processing STDF related data
- Java library for processing STDF related data
- LabVIEW 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