These methods give a permanent mark which can last up to the lifetime of the component.ĭata Matrix codes are usually verified using specialist camera equipment and software. The codes can be marked onto components with various methods, but within the aerospace industry these are commonly industrial ink-jet, dot-peen marking, laser marking, and electrolytic chemical etching (ECE). The code can be read quickly by a barcode reader which allows the media to be tracked, for example when a parcel has been dispatched to the recipient.įor industrial engineering purposes, Data Matrix codes can be marked directly onto components, ensuring that only the intended component is identified with the data-matrix-encoded data. ĭata Matrix codes are becoming common on printed media such as labels and letters. The US Electronic Industries Alliance (EIA) recommends using Data Matrix for labeling small electronic components. Fidelity of the marking and reading systems are the only limitation. Ī Data Matrix is scalable commercial applications exist with images as small as 300 micrometres (0.012 in) (laser etched on a 600-micrometre (0.024 in) silicon device) and as large as a 1 metre (3 ft) square (painted on the roof of a boxcar). The most popular application for Data Matrix is marking small items, due to the code's ability to encode fifty characters in a symbol that is readable at 2 or 3 mm 2 (0.003 or 0.005 sq in) and the fact that the code can be read with only a 20% contrast ratio. Symbol sizes vary from 10×10 to 144×144 in the new version ECC 200, and from 9×9 to 49×49 in the old version ECC 000 – 140.Īpplications A Data Matrix on a Mini PCI card, encoding the serial number 15C06E115AZC72983004 As more data is encoded in the symbol, the number of cells (rows and columns) increases. The finder pattern is used to locate and orient the symbol while the timing pattern provides a count of the number of rows and columns in the symbol. Within these borders are rows and columns of cells encoding information. Every Data Matrix is composed of two solid adjacent borders in an "L" shape (called the "finder pattern") and two other borders consisting of alternating dark and light "cells" or modules (called the "timing pattern"). Depending on the coding used, a "light" cell represents a 0 and a "dark" cell is a 1, or vice versa. A Data Matrix symbol can store up to 2,335 alphanumeric characters.ĭata Matrix symbols are rectangular, usually square in shape and composed of square "cells" which represent bits. Error correction codes are often used to increase reliability: even if one or more cells are damaged so it is unreadable, the message can still be read. The length of the encoded data depends on the number of cells in the matrix. Usual data size is from a few bytes up to 1556 bytes. The information to be encoded can be text or numeric data. JSTOR ( February 2010) ( Learn how and when to remove this template message)Īn example of a Data Matrix code, encoding the text: "Wikipedia, the free encyclopedia"Ī Data Matrix is a two-dimensional code consisting of black and white "cells" or dots arranged in either a square or rectangular pattern, also known as a matrix.Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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