Patent ID: 7012029
Filing Date: 2006-03-14
Classification: G02F,H01L

Abstract:
1. A method of forming an electrically conductive lamination pattern, said method including the steps of: forming an insulating film on a surface of a chromium-containing bottom layer; forming an aluminum-containing top layer over said insulating film, so that said insulating film separates said aluminum-containing top layer from said chromium-containing bottom layer; carrying out a first selective wet etching process for selectively etching said aluminum-containing top layer with a first etchant; and carrying out a second selective wet etching process for selectively etching said chromium-containing bottom layer with a second etchant in the presence of said insulating film which suppresses a hetero-metal-contact-potential-difference between said chromium-containing bottom layer and said aluminum-containing top layer during said second selective wet etching process.