레이저센서를 이용한 비접촉식 두께자동측정기 개발

Abstract

ABSTRACT In this study, we developed an automated non-contact thickness measurement machine that continuously and precisely measures the thickness and warp of a PCB product using a laser sensor. The system contains a measurement part to measure the thickness in real time automatically according to the set conditions with an alignment supply unit and unloading unit to separate OK and NG products. The measurement machine was utilized to evaluate the performance at each step to minimize measurement error. At the zero setting for the initial setup, the standard deviation of the 216 samples was determined to be 5.52㎛. A measurement error of 0.5mm and 1.0mm as a standard sample in the measurement accuracy assessment was found to be 2.48% and 2.28%, respectively. In the factory acceptance test, the standard deviation of 1.461mm PCB was measured as 28.99㎛, with a C pk of 1.2. The automatic thickness measurement machine developed in this study can contribute to productivity and quality improvement in the mass production process.Key Words : Thickness Measurement( ), Non-contact( ), Laser Sensor( ), Statistic 두께측정 비접촉 레이저센서Process Control(통계적공정관리 인쇄회로기판), PCB( )