source:Other information release time:2023-07-12 Hits: Popular:PCB Assembly company
On the automated plug -in loading line, if the printing line board is not flat, it will cause inaccurate positioning. The components cannot be inserted on the pads of the plate and surface paste of the board, and the automatic installation machine will even be damaged. After welding the board with the component, the component foot is difficult to cut and neatly. If this is the case, the PCB board cannot be installed on the socket or the socket, so the assembly plant is also very troubled when it encounters the board. At present, the printed circuit board has entered the era of surface installation and chip installation, and the requirements for assembly plants to be tilted on the board must become stricter and stricter.
Research (appraisal and performance specifications of rigid printed boards), the maximum warranty and distortion of the allowable printed board to install the printing board is 0.75%, and the other boards allow 1.5%. At present, the warranty of each electronic assembly plant is permitted by the two -sided circuit board or multi -layer circuit board, PCB thick copper board, 1.6mm thickness, usually 0.70 to 0.75%, many SMT, BGA boards, 0.5%requirement is 0.5% Essence Some electronic factories are encouraging to increase the standards of warmers to 0.3%. Put the printed board on the inspection platform, insert the test needle to the place with the largest warranty, with the diameter of the test needle, except the length of the printed board, you can calculate the warning board's warp upper The curvature.
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