Patent ID: 6107181
Filing Date: 2000-08-22
Classification: B23K,C03C,H01L,H05K,Y10S,Y10T

Abstract:
A method of forming bumps onto a chip having electrodes, said method comprising the steps of:using a template having through-holes with smoothed side walls formed corresponding to the electrodes of the chip, to attract conductive balls to be formed into bumps to the template at the through-holes by vacuum suction, said template having first and second opposite surfaces, said through-holes having first end openings at said first surface and second end openings at said second surface, said conductive balls being attracted to said first end openings while the template is being used, said first end openings having a size smaller than a size of the conductive balls to be attracted; positioning the conductive balls attracted by the template to the electrodes; pressing the conductive balls against the electrodes by the template; and releasing vacuum suction.