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2-Dimensional Codes
were developed in response to demands on code that could hold
more information and be printed in
smaller spaces. By positioning the data
vertically and horizontally, 2-dimensional codes are able to
increase the amount and density of the information contained.
Main Types of 2-Dimensional
Codes
|
Type |
Shape |
Features |
Error correction/ recovery rate |
|
Data Matrix
 |
 |
L-shaped profile pattern and
diagonal timing pattern |
Allows symbols to be made
compact. |
Data structures of older version
and ECC200 are different. ECC200 has a 30% error correction
rate |
|
QR Code
 |
 |
Three profile symbols |
Enables high-speed reading, and
is not affected by direction. |
Four selectable correction
rates: 7%, 15%, 25% and 30%. |
|
MAXI Code
 |
 |
Concentric circles in center |
Data structure enables
high-speed profile. |
Primary message: 25%
Secondary message:
Standard level SEC (15%)
Extended level EEC (21%) |
|
PDF417
 |
 Stack |
Suitable for large data volumes,
readable by laser scanners |
Contains seven correction levels |
Printing/Marking
2-Dimensional Codes
Labelers and printers for
2-dimensional codes onto labels are widely used in the fields of
distribution and logistics. Taking advantage of the error correction
function of the 2-dimensional code reader, codes can be directly
printed onto objects (such as LCD glass substrates, wafers,
electronic components, metallic parts, etc.), thus making it
possible to integrate objects and information. This ability allows
the use of 2-dimensional codes in a wide range of applications that
have been considered to be difficult until now. Laser Markers and
pin stamping machines are available for use in direct marking for
applications such as these.
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