Ultrasonic images interpretation improvement for microassembling technologies characterisation

摘要: Abstract This paper deals with two techniques for improvement of ultrasonic images interpretation based on image and digital signal processing. The first technique concerns We propose an analytical model to evaluate the effective Point Spread Function (PSF) a reflection scanning system. present great interest knowledge PSF deconvolution Lucy-Richardson algorithm. With this technique, lateral resolution is strongly improved real dimensions object can be reached that necessary improve understanding image. second showing different nature defects. A better these realized by means time flight detection. Time-Frequency (TF) analysis determine depth defects accuracy. Two applications microassembling die-attach characterisation are presented using methods.