| 摘要 |
The invention relates to a device (10) for testing electronic components (30) having at least one embedded layer (32) containing metal, in particular for testing multi-layer ceramic capacitors, the device (10) comprising an electromagnetic acoustic transducer (12), which has a pulse-generating unit (14), which is designed to generate at least one electromagnetic pulse (IMP) within a component (30) to be tested in order to create vibrations within the component (30), which generate an electromagnetic signal (RES) as a response to the electromagnetic pulse (IMP), has a receiving unit (16), which is designed to receive the electromagnetic signal (RES), and has an evaluating unit (18), which is designed to evaluate the electromagnetic signal (RES) at least in regard to an amplitude or amplitude change of the signal (RES) at at least one point in time, wherein the device (10) further comprises an assessment unit (20), which is designed to compare at least one amplitude or amplitude change of the signal (RES) determined by the evaluating unit (18) with at least one threshold (TH) and, depending on the comparison, to generate a first output signal (SIG1), which indicates that the component (30) to be tested should be considered functional, or to generate a second output signal (SIG2), which indicates that the component (30) to be tested should be considered defective. The invention further relates to a corresponding method and to a use of an electromagnetic acoustic transducer (12). |
