Laser Marking of ECC 200 2D Matrix Limitations o-n Printed Circuit Boards
Provide very high information density - the best among other typical 2D codes, meaning that it is possible to place a lot of information in a very small area.
They're scaleable, meaning that you can produce them and read them in a variety of degrees of magnification - only limited by the quality of the printing and imaging methods. Should you claim to dig up further on contract electronics manufacturing, there are lots of resources people should pursue.
Due to the high data density natural to Data Matrix requirements, they also offer integrated error-correction methods which allow completely recovering the message encoded in a Data Matrix symbol even though the tag is broken and missing as much as 2009-2010 of the symbol.