Patent ID: 7429513
Filing Date: 2008-09-30
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device, the semiconductor device comprising: a semiconducting body having a surface with a source region and a drain region defining a channel direction and a single channel region between the source region and the drain region, a first stack of layers on top of the channel region, the first stack comprising in this order, a tunnel dielectric layer, a charge storage layer for storing an electric charge, and a control gate layer, and a second stack of layers on top of the channel region directly adjacent to the first stack in the channel direction, the second stack comprising an access gate layer, the method comprising the steps of: providing the channel region with a provisional first stack comprising, in this order, the tunnel dielectric layer, the charge storage layer and a first sacrificial layer, providing a second sacrificial layer covering at least a part of the surface adjacent to the first stack and opposite to a position of the second stack, removing the first sacrificial layer, and providing the control gate layer and the access gate layer.