Patent ID: 8772930
Filing Date: 2014-07-08
Classification: H01L

Abstract:
1. A microelectronic device package including one or more electrical contacts comprising: a semiconductor material layer having one or more electrical devices fabricated therein and having an electrical contact pad positioned therein; a layer positioned adjacent to the semiconductor material layer, the layer including a conducting material stud embedded in or formed on the layer or bonded to the layer, wherein the conducting material stud is positioned beneath the electrical contact pad; a via formed through at least a portion of the semiconductor material layer and through the electrical contact pad and into the conducting material stud, wherein the conducting material stud relates to a thick plug of conductive material with a thickness on the order of 5 um to 200 um which is the thickness substantially larger than the thickness of the electrical contact pad, and the conducting material stud, positioned beneath the electrical contact pad, is in physical and electrical contact with the electrical contact pad, and the tip of the via terminates within at least a portion of the conducting material stud opening up an area of the conductive material performed by a via formation technique such that the entire via tip exposes the area of the conductive material of the conducting material stud, wherein the formed via terminates within the conducting material stud to ensure metallization of the electrical contact over a large region; and a metallization layer disposed in the via such that the metallization layer contacts the electrical contact pad and the area of the conductive material of the conducting material stud through the via tip to have electrical contact with both the electrical contact pad and the conductive material stud, wherein the metallization layer, the electrical contact pad and the conducting material stud are in physical and electrical contact among each other.