Design And Research On High-Precision Film Thickness Controller Instrument

This dissertation mainly research on high-precision thickness controller and design, specific to the question of the optical thin-film monitor in the current. It is difficult to judge on the extreme points as the result the thickness controller can not be on the coating process of data storage. As the Film Monitor is at a low degree of automation and the operator is on high Labor intensity, as the results that the thickness controller can not guarantee the quality of thin-film products such issues as research and development. In order to solve these problems, the dissertation first designed the DC amplifier circuit to amplify weak signals to increase their resolution, and then use the data acquisition card of PCL-6111 to monitor and algorithms of data processing algorithms after treatment makes it easier for extreme points judge. Then use the VC + + to write applications multi-threaded collection and coating process the raw data is automatically saved membrane through which the handle makes this paper is designed for high-precision thickness control instrument able to meet the requirements, and accurate monitoring of the film thickness .