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介绍了在研制传感器用的超小型电路过程中由于电阻元件精度往往不够高 ,且又不允许安装电位器调节电路参数的情况下 ,将激光技术和微机技术相结合 ,采用调阻法 ,把需要调整的电阻通过激光切割减少其截面积和长度来改变电阻值以满足实际需要。以一激光器加工系统为基础 ,就该方法的关键问题 :“激光功率密度及扫描速度对器件的温升影响”进行了详细地分析 ,得到其数学模型 ,并在此基础上进行了系统地实验 ,结果表明 :对于元件分切的最小宽度可做到 0 8mm ,电阻值任意可调 ,最小误差值为 0 1 % ;本实验中所采用的电阻材料 ,其激光扫描速度最佳值为 3 0mm/s。
Introduced in the development of sensors used in the process of ultra-small circuit due to the accuracy of resistance components is often not high enough, and does not allow the installation of potentiometer adjustment circuit parameters of the case, the laser technology and computer technology, the use of regulation method, the need Adjust the resistance by laser cutting to reduce its cross-sectional area and length to change the resistance value to meet the actual needs. Based on a laser processing system, the key problem of this method is analyzed in detail: the influence of laser power density and scanning speed on the temperature rise of the device, and the mathematical model is obtained. On the basis of this, a systematic experiment , The results showed that: the minimum width of the component can be cut 0 8mm, the resistance is adjustable, the minimum error is 0 1%; the resistance material used in this experiment, the laser scanning speed of the best value of 30mm / s.