In the circuit board industry, what effect does rocker bending have on production and assembly? What is the cause of rocker bending?
The reasons that may cause the board rocker bend are that on the one hand, the raw material copper clad laminate itself has the phenomenon of board rocker bend, but during the processing of the printed circuit board, due to thermal stress, chemical factors, and improper production processes will also cause circuit boards. The board is bent. The incorrect storage location and method will also cause the board to bend. If the humidity of the warehouse is high, the single-sided copper clad laminate will significantly increase the possibility of the board’s rocker bending; the raw materials must be placed flat. , The surface of the backing plate should be checked for protrusions and hard objects, so as not to cause the phenomenon that the raw material has board rocker bending; the uneven circuit pattern of the wire distribution on the two sides of the circuit board will also cause the board rocker bending phenomenon. Example 1 , If the board thickness is above 1.6mm, the possibility of board rocker bending may be less than or equal to 75%. If the board rocker bending exceeds the upper limit, it will easily cause the board to jam and damage the machine during the production process; there is a board rocker bending circuit When the solder paste is applied to the board, the solder paste will flow unevenly when the solder paste is applied to the patch; the solder paste may even cause damage to the screen when the board is bent. When the rocker is bent, select the board with the rocker bend before making the circuit solder mask, so as to avoid damage to the screen and film and poor printing during the solder mask during the production process; After processing, proceed to the next process of processing and production operations. Example 3, the board with a thickness of 0.2-0.4mm has the phenomenon of board rocker bending, and the board rocker bending is prone to jamming during horizontal production, resulting in board breakage If the situation of rocker bending must be processed before proceeding to the next production process. For 0.2-0.4mm thick board with rocker bending, it can be produced as a fixture and dragged through the horizontal line, so as not to cause the card board to break; If the thickness is more than 1.2mm, there is a plate rocker bend that can be reversed by a platen warping machine.
