The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In the ultrasonic wire bonding process, the impedance change of transducer system was reflected by the current amplitude, the change of the system's resonance frequency was represented by the change of the current's frequency. The current signals contained much information about the bonding process and the resulted bond quality. The characteristics of current were depending on the tip states. Free,...
The resonant frequency of transducer is changed with the state of thermosonic wire bonding interface. The ultrasonic generator need to trace the frequency of transducer, and keep the stimulate frequency consist with the resonant frequency of transducer. The frequency tracking strategy is based on the phase-frequency transducer. The dynamic phase-frequency characteristic was measured with a new FPGA...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.