Manufacturers of gadgets, at home audio equipment to automotive keyless entry systems, are seeking a reliable, cost effective technique for visually identifying and tracking services and products throughout the manufacturing cycle, earnings supply and after-sale warranty confirmation. An autonomous, automated tracking system necessitates that a permanent, machine-readable code be implemented to a interior printed circuit board to visually identify each product. The code must be durable enough to survive manufacturing processes involving wave solder and plank cleanup, must not impact circuit performance, and must store information from the small space available on realestate conscious printed circuit boards.
The 2D matrix code provides a means to printed circuit board manufacturers alphanumeric character strings in rather smallish parts of the printed circuit board. Laser marking technology supplies a method for eternally applying 2D matrix codes to board substrates. The high heeled and high-accuracy of beam-steered laser signaling systems provides the capacity to make well defined, higher reliability codes regardless of code size. Laser marking additionally provides the user having a computer-controlled marking process for simple execution to automated product tracking systems.
ECC 200 2D Matrix Codes
Two dimensional symbologies encode information in the form of a checker board pattern of cells that are senile. Specific Features of Data Matrix codes over conventional 1D barcodes comprise:
· Encode advice digitally, instead of the analog encoding of data in conventional barcodes.
· Can adapt low-contrast printing directly on parts without needing a label
· Offer very high information density – the highest among other ordinary 2D codes, which means that you can place a lot of data in a tiny place.
· they’re scalable, which means you could publish them and read them at various levels of magnification – merely restricted by the resolution of these available imaging and printing techniques.
· Due to this high information density inherent to Data Matrix codes, in addition they offer built in error-correction methods which allow fully recovering the message encoded in a Data Matrix symbol even though the markers is damaged and missing as much as 20% of their symbol.
· They’re read by camcorders instead of a scanned laser beam applied for reading traditional bar codes, meaning that they may be read in any orientation.
Data Matrix codes are typically not replacing conventional linear bar codes, but are being used where traditional bar codes were too big, failed to provide sufficient storage capacity, or were unreadable.
The 2D matrix codes seem like a”checker board” with the individual sections (cells) in either on on (white) or away (black) state) The code contains four different elements.
· The Finder”L” Pattern is made up of solid row of cells over the left edge and base of the code that orients the reader into the layout of this 2D code.
· The Clock Track is a succession of on/off cells together the perfect edge along with the code which designates the row/column depend on the reader.
· the info Region could be the design of both black and white cells within the L pattern and also the clock tracks which contain the alpha numeric content of this code.
· The Silent Zone round the code has to be free of any features which could be visible to this reader. The quiet zone needs to be two rows/columns wide for codes made out of square cells. The silent zone should be four rows/columns wide for codes constructed of circular cells (dots).
ECC 200 Data Matrix codes may store upto 3,116 numerical, 2,335 alphanumeric characters or 1,555 bytes of binary information in a 144 pillar by 144 row array. More realistic symbol size for printed circuit boards may still contain a significant amount of information.