Patent ID: 6121062
Filing Date: 2000-09-19
Classification: H01L,H05K

Abstract:
A semiconductor-unit fabrication method, comprising the steps of:a) forming a plurality of bumps on a main surface of a first one of two components, each bump having a respective height relative to the main surface;b) measuring the respective heights of said bumps, each measured as a distance in standard units from the main surface; andc) positioning said two components, with said bumps therebetween and at a distance between said two components equal to or greater than a maximum height of the respective heights of the bumps measured in said step b), and applying a force acting to reduce the distance between the two components to a selected, first distance and thereby to reduce the respective heights of the bumps to intermediate the maximum and minimum measured bump heights, press fixing the two components together; andd) while maintaining a second selected distance between the two components, at which the bumps are all reduced to a second selected height less than the minimum of the bump heights measured prior to the press fixing step, melting the bumps so as to cause the bumps to reflow and thereby bond the two components together.