Patent ID: 6753208
Filing Date: 2004-06-22
Classification: H01L

Abstract:
A method of packaging semiconductor die wherein a plurality of individual semiconductor die are formed as part of an upper surface of a semiconductor wafer, the method comprising:forming holes in a glass sheet, wherein the holes correspond to the location of bond pads disposed on a surface of the individual semiconductor die formed as part of the semiconductor wafer, the glass sheet having a coefficient of thermal expansion that is substantially the same as the coefficient of thermal expansion of the semiconductor wafer; depositing a first layer of conductive material on a first surface of the glass sheet; etching the first layer of conductive material to form conductive pads on the first surface of the glass sheet adjacent to the holes in the glass sheet; affixing a second surface of the glass sheet to the upper surface of the semiconductor wafer utilizing an adhesive such that the holes in the glass sheet are aligned to match the location of the bond pads disposed on the surface of the individual semiconductor die; etching the adhesive such that the adhesive is removed from the bond pads; forming a patterned second layer of conductive material on the first surface of the glass sheet to create conductive traces that electrically connect the conductive pads through the holes in the glass sheet to the bond pads; and forming solder balls on the conductive pads.