Informatics

• Data Model
• Standard Test Data Format (STDF)
• Toolz
• Tutorial
• Wafermap
• eXtensible Test Data Format (XTDF)

Data Model

Semiconductor Data Object Model (SDOM)
A proven data object model for semiconductor data.

stdf4_survey (Version 1.0.0)
A Perl program to survey an STDF Version 4 file and output information about the file contents. (Perl Program; Documentation As HTML); Documentation As PDF)

stdf4_to_xtdf1 (Version 1.0.0)
A Perl program to convert an STDF version 4 file to an XTDF version 1 file. (Perl Program; Documentation As HTML); Documentation As PDF)

stdf4_to_atdf2 (Version 1.1.2)
A Perl program to convert an STDF version 4 file to an ATDF version 2 file. (Perl Program; Documentation As HTML); Documentation As PDF)

atdf2_to_stdf4 (Version 1.0.3)
A Perl program to convert an ATDF version 2 file to an STDF version 4 file. (Perl Program; Documentation As HTML); Documentation As PDF)

TDF (Version 1.1.1)
A Perl module containing subroutines for STDF version 4 and ATDF version 2 files. (This module is required by the atdf2_to_stdf4.pl and stdf4_to_atdf2.pl programs.) (Perl Module; Documentation As HTML); Documentation As PDF)

Die Per Wafer Calculator
Accurately calculates die per wafer including both reticle and die sizing parameters. Four different stepping algorithms (die centered, side biased, top biased, or point centered) can be applied.

Die Shrink Calculator
Accurately calculates die size considering both pad and circuit pitch for up to 20 iterations with any multiplier used as a shrink factor. The program calculates the minimum "pad limited" shrink size.

Semiconductor Manufacturing and Engineering Data Analysis Overview
An overview of Semiconductor Manaufacturing and how Engineering Data Analysis is used to improve yield and quality.

Semiconductor Wafermap Mathematics 1
An explanation of how to mathematically transform the orthogonal coordinates of the die on a semiconductor wafer.

Semiconductor Wafermap Mathematics 2
An explanation of grid and point coordinate systems and how to align them to each other and the physical wafer.

The eXtensible Test Data Format (XTDF) is an XML variant of the Standard Test Data Format (STDF) file specification. The STDF field names and data types are emulated using XML as closely as possible to preserve the STDF file structure and content. Here is an example of an XTDF file. Advantages of XTDF compared to STDF:

	+ Compatible with standard XML utilities.
	+ Easy to enhance and extend contents.
	+ Platform independent ASCII.
	+ Easy to read.
	+ Easy to edit.

	- Larger file size.

	+ Preserves all STDF content (enables loss less conversion back to STDF).
	+ Compatible with standard XML utilities.
	+ Same syntax as STDF (ATDF has different syntax than STDF).
	+ Easy to enhance and extend the syntax.

	- Larger file size.