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Abstract
Long-side welding platform is the ultimate actuator of micro crystal resonator packaging. The position accuracy of solder joint will directly affect the packaging quality. In order to optimize the tolerance grade of the long-side welding platform and reduce the manufacturing cost on the premise of ensuring the position accuracy of the solder joint, the optimal tolerance grade selection scheme of the long-side welding platform for micro crystal resonator packaging is designed. Based on the improved homogeneous coordinate transformation method, the solder joint error model of long-side welding platform is established. Based on the Monte Carlo simulation method, the position error of solder joint is calculated and the tolerance grade selection scheme is proposed. Based on orthogonal experiment method, the noteworthy factors in position error of long-side welding platform is analyzed, the optimal allocation scheme for the tolerance grade of parts is put forward.