Patent ID: 7538039
Filing Date: 2009-05-26
Classification: G02F,H01L,H05K

Abstract:
1. A method for manufacturing a wiring over a substrate comprising the steps of: forming a first conductive layer over an insulating surface; forming a first mask pattern over the first conductive layer; forming a second mask pattern and a second conductive layer having a first side surface having a first angle of inclination by etching the first mask pattern and the first conductive layer under a first condition; and forming a third conductive layer and a third mask pattern by etching the second conductive layer and the second mask pattern under a second condition; wherein the third conductive layer has at least a second side surface at a lower portion of the third conductive layer and a third side surface at an upper portion of the third conductive layer; wherein the second side surface has a second angle of inclination; wherein the third side surface has a third angle of inclination; wherein the second angle of inclination is different from the third angle of inclination; and wherein a first selective ratio under the first condition of the first mask pattern to the first conductive layer is in a range of 0.25 to 4, and a second selective ratio under the second condition of the second mask pattern to the second conductive layer is larger than the first selective ratio.