VIBRATION PROTECTION SYSTEM WITH AN ELASTIC INTERFERENCE RING CONSTRUCTIVE SOLUTIONS AND THEIR TESTING

The article considers a vibration protection system with an elastic intermittent link. A constructive solution is presented in the form of a mechanical oscillator simulating the process of operation of the considered vibration protection system. The results of experimental studies of the operation of a mechanical oscillator are presented. Conclusions have been drawn on the prospects of using a vibration protection system with an intermittent elastic link.

Design of Image Processing System on Pressure Varied Using Interferometer Mach-Zehnder

Quantitative analysis and visualization of light becomes very important when we understand the nature of light, namely interference. This also applies to light-darkness conditions (such as the nature of light when an interference phenomenon occurs) and the application of light-propagating light (such as the wavelength traveled by light in the airspace or pressurized space). Because in the nature of light requires experimental observations and program algorithms that utilize the process of analyzing the nature of the light that occurs (interferometer). This study aims to design an image processing system design to obtain qualitative from the nature of light interference. Large quantitative interference ring measurement trials were carried out using the width measurement results on the observation board which varied at pressures of 0, -100, -200, -300, -400, and -500 which were given light sources from the red laser. From the measurement results obtained the difference between rings on the board in the form of area. The area can be compared manually to get the uncertainty of the sidewall fabrication that gives an error in the measurement.

NANOSECOND LASER-INDUCED THERMAL DIFFUSION DURING LASER ABLATION OF EPOXY FROM A MULTILAYERED SURFACE

Interference ring marks were observed on a copper substrate consisting of plated layers of Au, Pd and Ni after laser ablation of epoxy material from the top surface. These ring marks are the result of laser-induced surface oxidation and need to be avoided or minimized in order to improve the solder wettability on the treated surface. Studies of laser-induced thermal diffusion through the plated layers were carried out using a 532 nm Q-switch Nd:YAG laser. The major process variables investigated were the beam profile, pulse repetition rate and beam scan pattern. Secondary ion mass spectroscopy (SIMS) was used to obtain a depth profile of the laser-treated layers. It revealed that interfusion of Pd and Ni by diffusion occurred during laser irradiation. Calculations of thermal diffusion length and temperature rise of the metal layers without considering the accumulated thermal effect of overlapping pulses are presented in this article. The study results are useful for a better understanding of the process of laser removal of epoxy flashes on leadframe heatsink surfaces.