摘要:
A method of filling a bit line contact via. The method includes providing a substrate having a device region and periphery region, the device region having a transistor, having a gate electrode, drain region, and source region, on the substrate, forming a dielectric layer overlying the substrate, the dielectric layer having a bit line contact via exposing the drain region, and periphery contact via exposing the periphery region, forming a doped conductive layer, lower than the dielectric layer, overlying the drain region, conformally forming a barrier layer overlying the dielectric layer, doped conductive layer, and periphery region, and forming a first conductive layer filling the bit line contact via and periphery contact via.
摘要:
A method of reworking an integrated circuit device is described. A substrate having a dielectric layer, a barrier layer, a conductive layer and an anti-reflective layer formed thereon, is provided. The method of reworking the barrier layer, the conductive layer and the anti-reflective layer comprises removing the anti-reflection layer by performing a dry etching process, removing the conductive layer by performing a wet etching process, and then removing the barrier layer by performing a chemical machine polishing process.
摘要:
A method for forming contact holes using a multi-layer hard mask. A substrate with a device region and an alignment region having an opening therein to serve as an alignment mark is provided. A dielectric layer is formed overlying the substrate and fills the opening, followed by the multi-layer hard mask. The multi-layer hard mask over the opening is partially removed and that on the device region is patterned to form a plurality of holes therein and expose the underlying dielectric layer. The exposed dielectric layer on the device region is etched to form the plurality of contact holes therein.
摘要:
A method for forming contact holes using a partially recessed hard mask. A substrate with a device region and an alignment region having an opening therein, acting as an alignment mark, is provided. A dielectric layer is formed overlying the substrate and fills the opening. A polysilicon layer is formed on the dielectric layer, with over the opening on the alignment region comprising a recessed region and on the device region comprising a plurality of holes therein to expose the underlying dielectric layer. The exposed dielectric layer on the device region is etched to form contact holes therein.
摘要:
A partial vertical memory cell and fabrication method thereof. A semiconductor substrate is provided, in which two deep trenches having deep trench capacitors respectively are formed, and the deep trench capacitors are lower than a top surface of the semiconductor substrate. A portion of the semiconductor outside the deep trenches is removed to form a pillar between. The pillar is ion implanted to form an ion-doped area in the pillar corner acting as a S/D area. A gate dielectric layer and a conducting layer are conformally formed on the pillar sequentially. An isolation is formed in the semiconductor substrate beside the conducting layer. The conducting layer is defined to form a first gate and a second gate.
摘要:
A method of reducing trench aspect ratio. A trench is formed in a substrate. A conformal Si-rich oxide layer is formed on the surface of the trench by HDPCVD. A conformal first oxide layer is formed on the Si-rich oxide layer by HDPCVD. A conformal second oxide layer is formed on the first oxide layer by LPCVD. Part of the Si-rich oxide layer, the second oxide layer and the first oxide layer are removed by anisotropic etching to form an oxide spacer composed of a remaining Si-rich oxide layer, a remaining second oxide layer and a remaining first oxide layer. The remaining second oxide layer, part of the remaining first oxide layer and part of the Si-rich oxide layer are removed by BOE. Thus, parts of the remaining first and Si-rich oxide layers are formed on the lower surface of the trench, thereby reducing the trench aspect ratio.
摘要:
A method for forming a trench capacitor. A semiconductor substrate with a trench is provided, and a trench capacitor is formed in the trench with a storage node and a node dielectric layer. The top portion of the trench is ion implanted to a predetermined angle to form an ion doped area on a sidewall of the top portion of the trench and a top surface of the trench capacitor. The ion doped area is oxidized to form an oxide layer. A sidewall semiconductor layer is formed on another sidewall using the oxide layer as a mask, and then the oxide layer is removed. A barrier layer is conformally formed on the surface of the trench, and the trench is filled with a conducting layer.
摘要:
A double corner rounding process for a partial vertical cell. A first corner rounding process is performed after etching the substrate to form a shallow trench for device isolation. A second corner rounding process is performed after forming shallow trench isolations (STIs) and exposing the corner of the substrate at the active areas in the memory cell array region.
摘要:
The present invention provides a method for manufacturing a stacked gate structure in a semiconductor device. The method includes the steps of sequentially forming a gate dielectric layer, a poly-silicon layer, a metal layer, a barrier layer, and a tungsten layer on a semiconductor substrate, carrying out a rapid thermal annealing (RTA) in a nitrogen ambient, forming a silicon nitride layer on the tungsten layer, and patterning the multilayer thin-film structure into a predetermined configuration.
摘要:
Disclosed is a. method for detecting STI void of a semiconductor wafer. The method of the present invention comprises steps of assigning a detecting area in a predetermined region of the wafer; forming active areas and gate strips crossing the active areas by the process synchronized with that for other regions of the wafer. Dielectric material is filled between the active areas. The adjacent portion between the active areas reaches a predetermined length at least. The electrical value of the gate strips is measured to determine whether there is any void in the dielectric filled between the active areas, thereby to derive whether there is any void generated in the STI between the active areas of the other regions of the wafer.