激光在超小型电阻参数调试中的应用研究

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，且又不充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，氢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：“浙江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

Study of application of laser to adjustment extra-small kind of resistor's parameter of new sensor

It is introduced that precision of printed resistor used for extro-small kind of circuit is not high and during studying a sensor it is impossible to set a regulation-resistance on the circuit board for regulating the parameter.It is a good method to solve this problem to fulfil the actual demand by combining computer with laser technology,using laser's incision to decrease the resistance's dimension and length to adjust the resistance value. In this topic,based on the laser-making system,the author analyses in detail the crucial problem between scan time and surface's temperature raise and gets its mathematical model .Also based on the above results, the author has made some systematic experiments and obtained some results from experiments.These results show that not only the minimum width of the resitance elements may be 0 8 mm,but also the value of the resistance is regulatable and the minimum error of the resistance is not over 0 1%, the optimal value of the laser scanning speed is 30 mm/s by using the resistance materical in the tests.