摘要:
A method for fabricating a silicon-oxide-nitride-oxide-silicon (SONOS) non-volatile memory cell, wherein the method comprises steps as following: a pad oxide layer and a first hard mask layer are sequentially formed on a substrate. The pad oxide layer and the first hard mask layer are then etched through to form an opening exposing a portion of the substrate. Subsequently, an oxide-nitride-oxide (ONO) structure with a size substantially less than or equal to the opening is formed to coincide with the portion of the substrate exposed from the opening.
摘要:
A non-volatile memory cell includes a substrate, two charge trapping structures, a gate oxide layer, a gate and two doping regions. The charge trapping structures are disposed on the substrate separately. The gate oxide layer is disposed on the substrate between the two charge trapping structures. The gate is disposed on the gate oxide layer and the charge trapping structures, wherein the charge trapping structures protrude from two sides of the gate. The doping regions are disposed in the substrate at two sides of the gate.
摘要:
A non-volatile memory cell includes a substrate, two charge trapping structures, a gate oxide layer, a gate and two doping regions. The charge trapping structures are disposed on the substrate separately. The gate oxide layer is disposed on the substrate between the two charge trapping structures. The gate is disposed on the gate oxide layer and the charge trapping structures, wherein the charge trapping structures protrude from two sides of the gate. The doping regions are disposed in the substrate at two sides of the gate.
摘要:
A method for forming a semiconductor structure includes following steps. A substrate structure is provided. The substrate structure includes a semiconductor substrate, a first oxide-nitride-oxide (ONO) layer, and a second ONO layer. The semiconductor substrate has first and second surfaces opposite to each other. The first ONO layer includes a first oxide layer, a first nitride layer and a second oxide layer formed on the first surface in sequence. The second ONO layer includes a third oxide layer, a second nitride layer and a fourth oxide layer formed on the second surface in sequence. A nitride mask layer is formed on the first ONO layer. The fourth oxide layer is removed. The second nitride layer and the nitride mask layer are removed. The second oxide layer and the third oxide layer are removed. A fifth oxide layer is formed on the first nitride layer.
摘要:
A method for fabricating a semiconductor device is described. A stacked gate dielectric is formed over a substrate, including a first dielectric layer, a second dielectric layer and a third dielectric layer from bottom to top. A conductive layer is formed on the stacked gate dielectric and then patterned to form a gate conductor. The exposed portion of the third and the second dielectric layers are removed with a selective wet cleaning step. S/D extension regions are formed in the substrate with the gate conductor as a mask. A first spacer is formed on the sidewall of the gate conductor and a portion of the first dielectric layer exposed by the first spacer is removed. S/D regions are formed in the substrate at both sides of the first spacer. A metal silicide layer is formed on the S/D regions.
摘要:
A method for fabricating a semiconductor device is described. A stacked gate dielectric is formed over a substrate, including a first dielectric layer, a second dielectric layer and a third dielectric layer from bottom to top. A conductive layer is formed on the stacked gate dielectric and then patterned to form a gate conductor. The exposed portion of the third and the second dielectric layers are removed with a selective wet cleaning step. S/D extension regions are formed in the substrate with the gate conductor as a mask. A first spacer is formed on the sidewall of the gate conductor and a portion of the first dielectric layer exposed by the first spacer is removed. S/D regions are formed in the substrate at both sides of the first spacer. A metal silicide layer is formed on the S/D regions.