Patent ID: 7276787
Filing Date: 2007-10-02
Classification: H01L

Abstract:
1. A semiconductor carrier structure for mounting semiconductor chips comprising: a semiconductor substrate comprising a substrate material having a first coefficient of thermal expansion and a first elastic modulus; at least one constant diameter through-via in said semiconductor substrate, wherein each of said through-vias is filled with a conductive structure having a second coefficient of thermal expansion which is less than or substantially the same as the first coefficient of thermal expansion and a second elastic modulus which is less than or equal to the first elastic modulus, wherein said each conductive structure comprises a first conductive via material disposed in annular shape along the sidewalls of said through-via, said annular shape having an annular diameter which is said constant diameter and having a core structure comprising a second via material disposed within said annular shape and having a core diameter which is less than said constant diameter.