A method for forming a via hole and a trench for a dual damascene
interconnection comprises forming a via hole through an inter-metal
insulating film to expose a portion of a surface of an etch stop film on
a lower metal film, forming a photoresist film on an entire surface of
the resultant structure and in the via hole, exposing a top surface and a
side surface of the inter-metal insulating film by recessing the
photoresist film using a development process for the photoresist film,
forming a bottom antireflective coating film on the exposed surfaces of
the inter-metal insulating film and the photoresist film, forming a mask
pattern on the bottom antireflective coating film, forming a trench by an
etching process using the mask pattern as an etch mask, and completely
removing the photoresist film within the via hole.