Patent ID: 6780675
Filing Date: 2004-08-24
Classification: H01L

Abstract:
An assembly method for a semiconductor assembly, comprising: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 lest 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 said passivation layer; forming an opening in said passivation layer at the location of said at least one conductive pad of said at least one lead of said first substrate; 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 said opening in 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; forming direct sliding movable 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; and encapsulating said first substrate and said second substrate with an encapsulation material.