In the PCB design, when the final PCB mass production is carried out, the PCB assembly is also a very important matter, which not only involves the quality standards of the PCB circuit board, but also affects the cost of PCB production. The production company pays great attention to solving a problem how to make reasonable and effective boarding under the premise of ensuring the quality of the PCB circuit board, so as to save raw materials.

　　01 Imposition connection method

　　 PCB imposition linking method has two linking methods, one is V-cut and the other is stamp hole linking.

　　V-cut is generally suitable for PCBs with a rectangular shape. It is characterized by neat edges after separation and low processing cost. It is recommended to use it first;

　　 stamp hole is generally suitable for irregular plate type imposition, such as MID "L" type frame structure often adopts the method of linking stamp holes for imposition;

　　02 Number of Imposition

　　***According to the size of a single PCB board, the size of the entire imposition should not exceed the large size range of the PCB (PCB imposition length must not be greater than 250mm), and too many impositions will affect the accuracy of the imposition position and the placement accuracy. Generally, the main board of MID type is 2 imposition, and the sub-board of the key board and LCD board does not exceed 6 imposition. The sub-board of special area depends on the specific situation.

　　03 Requirements for the link of the stamp hole

　　 In a PCB imposition, the number of link bars should be appropriate, generally 2-3 link bars, so that the strength of the PCB meets the requirements of the production process, and it should not be broken at every turn.

　　 When designing the link bar, it is generally necessary to design a length of 4-5mm, the hole is non-metallized, the size is generally 0.3mm-0.5mm, and the distance between the holes is 0.8-1.2mm;

　　04 craft side

　　 When the board is denser with more components and the board edge space is limited, it is necessary to increase the process edge. When used for SMT, the PCB board transfer edge, usually 3-5mm. Generally, a positioning hole is added to each of the four corners on the process side, and optical positioning points are added to the three corners to strengthen the positioning of the machine