00196625-03_AI_SX12_PCB_Barcode_de_en.pdf - 第201页

Annex Structure of 2D Barcodes General Notes About the Barcode PCB Barcode LP-Barcode 201 Advantages of data matrix code: ▪ Flexible in terms of the rang e of applications ▪ Very high in formation density in the smallest…

Annex

General Notes About the Barcode Structure of 2D Barcodes

200 PCB Barcode LP-Barcode

4.3.2 Structure of 2D Barcodes

Barcode types:

1. "Stacked" codes, these are essentially one-dimensional barcodes that are printed directly over one

another. Typical stacked barcodes include the PDF 417, RSS-14 Stacked and the 16K code.

Stacked barcodes

2. 2D barcodes, known as "matrix codes" are another variant of the 2D barcodes. Again there are var-

ious types commonly used, such as Aztec code, Maxi code, Code One and the data matrix code.

2D barcodes

Data matrix code: The data matrix code consists of 4 main components.

4 main components of the data matrix code

Legend

1. The fixed dividing line ('corner’). This fixed dividing line is used for pattern recognition and to calcu-

late the rotary position of the data matrix code.

2. The non-closed border (opposite corner). This open corner is used to identify the number of lines

and gaps. This is known as the "matrix density“. On the ECC 200, the element in the top right-hand

corner is white.

3. The storage area. This contains the binary information in coded form. Depending on the cell size, it

also defines the number of possible items of information.

4. The 'rest zone'. This empty zone surrounds the data matrix code. It contains no information and is

not used for orientation. The width of the rest zone is one field or one line.

1. Corner 2. Opposite corner

3. Storage area 4. Rest zone

Annex

Structure of 2D Barcodes General Notes About the Barcode

PCB Barcode LP-Barcode 201

Advantages of data matrix code:

▪ Flexible in terms of the range of applications

▪ Very high information density in the smallest space (over 2000 characters)

▪ Scanning is possible from any angle

▪ Minimal requirements in terms of color contrast and print quality and thus suitable for direct labelers

(e.g. laser labelers or needle embossing) as these require less contrast than for barcodes.

▪ Error correction using the "Reed-Solomon" algorithm - up to 25 % of the code may be damaged.

Sample applications:

▪ Scanning permanent direct labels (e.g. on tools, motor components, drive parts, surgical instru-

ments, etc).

▪ Production / manufacturing (identification of electronic components, tools, etc.)

▪ Chemical and biomedical analysis instruments

▪PCBs

Data matrix - and DOT matrix barcodes

Annex

General Notes About the Barcode Structure of 2D Barcodes

202 PCB Barcode LP-Barcode