Patent ID: 6499647
Filing Date: 2002-12-31
Classification: B23K,H05K

Abstract:
A method of producing at least one contact between two conductive layers (102, 103) separated by an insulating layer (104), comprising the steps, making a complex (101) of these layers, pressing said complex between a fixed means (106) and a means (105) excited by ultrasound applied perpendicular to the face of the complex, a face of the fixed means (106) resting on the complex having at least one protruding part (107) with a surface for contacting and for deforming the complex during application of the ultrasound in order to allow flowing and opening of the insulating layer in the region of said at least one protruding part, and then bringing into contact and welding of the metallic layers in the region of said at least one protruding part, wherein said surface (107) of said fixed means protruding part has a smaller cross section than the facing means for exciting by ultrasound (105), whereby precise alignment of the two faces of the two means does not have to be precisely aligned.