Patent ID: 8507344
Filing Date: 2013-08-13
Classification: H01L

Abstract:
1. A method for forming a semiconductor device, the method comprising: forming first and second buried gates in a semiconductor substrate; forming a landing plug between the first and second buried gates; forming a bit line region to expose the landing plug over the semiconductor substrate; forming a glue layer on sidewalls and a lower surface of the bit line region; forming a bit line layer over the glue layer; etching the bit line layer and the glue layer to form a remaining bit line layer and a remaining glue layer so that the remaining bit line layer and the remaining glue layer remain only at a lower portion of the bit line region; removing a portion of the remaining glue layer at the sidewalls of the remaining bit line layer; and forming an insulation layer in a space where the portion of the remaining glue layer is removed from the sidewalls of the remaining bit line layer.