Patent ID: 6578755
Filing Date: 2003-06-17
Classification: B23K,H01L,H05K,Y02P

Abstract:
A method of forming a solder-bumped structure, said method comprising the steps of:a. providing a first conductive solder bump pad on a surface of a substrate; b. applying uncured polymer material over the first conductive solder bump pad, the uncured polymer material having an initial thickness proximate the first conductive solder bump pad; c. following step b., placing a base region of a first pre-formed solder ball into the uncured polymer material and onto the first conductive solder bump pad, the first pre-formed solder ball having a height that is greater than the initial thickness of the uncured polymer material proximate the first conductive solder bump, the first solder ball having a characteristic reflow temperature; and d. heating the substrate to the reflow temperature of the first solder ball to join the base region of the first solder ball to the first conductive solder bump pad and to at least partially cure the polymer material surrounding the base region of the first solder ball, the first solder ball protruding above the at least partially cured polymer material surrounding the base region of the first solder ball.