Patent ID: 6221753
Filing Date: 2001-04-24
Classification: H01L

Abstract:
A method of producing a semiconductor assembly, comprising the steps of:providing a first substrate having a facing surface and having at least one lead having a portion thereof located on said facing surface of said first substrate, said at least one lead having at least one conductive pad disposed on the portion thereof located on said facing surface of said first substrate, said at least one conductive pad of said at least one lead of said first substrate having a thickness and having a contact surface area;providing a second substrate having a facing surface and having at least one lead having a portion thereof located on said facing surface of said second substrate, said at least one lead having at least one conductive pad disposed on the portion thereof located on said facing surface of said second substrate, said at least one conductive pad of said at least one lead of said second substrate having a thickness and having a contact surface area;providing a passivation layer on said facing surface of said first substrate, said passivation layer having a thickness greater than said thickness of said at least one conductive pad of said at least one lead of said first substrate such that said at least one conductive pad of said at least one lead of said first substrate is recessed a distance within an opening of said passivation layer;attaching said first substrate to said second substrate, said at least one conductive pad of said at least one lead of said second substrate extending a distance within an opening of said passivation layer of said first substrate;abutting said contact surface area of said at least one conductive pad of said at least one lead of said first substrate against said contact surface area of said at least one conductive pad of said at least one lead of said second substrate; andforming a direct sliding contact between said contact surface area of said at least one conductive pad of said at least one lead of said first substrate and said contact surface area of said at least one conductive pad of said at least one lead of said second substrate, and establishing electrical communication therebetween.