Patent ID: 6979643
Filing Date: 2005-12-27
Classification: H01L

Abstract:
1. A method for forming interlayer connections in a layered thin-film electronic device for storing or processing of data, wherein the device comprises electrical connections between circuitry located in two or more circuit layers separated by layers of electrically insulating material, wherein conducting material is applied as current paths on each circuit layer for connecting the circuitry located therein and joined with interlayer connections consisting of plugs or wires of highly electrically conducting material penetrating said interlayers of electrically insulating material, wherein the plugs or wires in the plane of said interlayers have a cross section with dimensions that are longer in one direction, with a longitudinal dimension of representative magnitude Y and a transversal dimension of representative magnitude X, such that Y>X, and the method comprising the steps of forming an underlying circuit layer, placing an insulating interlayer overlying the underlying circuit layer and the insulating interlayer having a via opening having the longitudinal dimension and the transversal dimension such that Y>X, and forming an overlying circuit layer overlying the insulating interlayer while simultaneously entirely forming a plug or wire as a part of the overlying circuit layer to pass into the via opening and the plug or wire being the only contact between the underlying circuit layer and the overlying circuit layer and the plug or wire being formed in one and the same step as used for applying the conducting material for a conducting path of the overlying circuit layer.