摘要:
The present invention provides a fabricating method and structure of a dynamic random access memory. In this method, a substrate having a transistor thereon is provided. A bit line is formed on the substrate. The bit line is electrically coupled with the transistor through a contact hole. A second dielectric layer having a node contact opening is formed on the bit line. An etching step is performed to etch the bit line. A concave surface is formed on the sidewall of the bit line. Spacer layers are formed on the sidewalls of the node contact opening. Each spacer layer is used to insulate the concave surface. Thus, from the top-view layout, a portion of the node contact opening can overlap with the bit line. Thus, the size of DRAM is effectively reduced.
摘要:
A method of fabricating a node contact window. A substrate having devices and a first dielectric layer is provided. Bit lines having spacer are formed on the first dielectric layer and a second is formed on the first dielectric layer. A hard material layer is then formed on the second dielectric layer. An opening is formed within the second dielectric layer to expose the spacer and the first dielectric layer. A polysilicon spacer is then formed on the sidewalls of the opening. A node contact window is formed by etching through the first dielectric layer to expose the substrate.
摘要:
A method of fabricating a bottom electrode is described. A substrate having a conductive layer therein is provided. A first dielectric layer is formed over the substrate. A conductive plug is formed through the first dielectric layer to electrically couple with the conductive layer. A cap layer is formed over the substrate to cover the conductive plug. An isolation layer is formed over the cap layer. A plurality of bit lines is formed over the isolation layer. A second dielectric layer is formed over the isolation layer. A node contact opening is formed through the second dielectric layer, the bit lines and the isolation layer to expose the cap layer. A conformal isolation layer is formed over the substrate to partially fill the contact node opening. A third dielectric layer having an opening is formed over the substrate. The opening is aligned with the node contact opening. An etching step is performed to remove a portion of the conformal isolation layer exposed by the opening and the cap layer. An isolation spacer remaining from the conformal isolation layer is formed on a sidewall of the contact node opening. A conformal conductive layer is formed in the opening and the node contact opening to make contact with the conductive plug. The third dielectric layer is removed.
摘要:
A method of manufacturing a bottom electrode of a capacitor. A first dielectric layer is formed on a substrate. A cap layer is formed on the first dielectric layer. A second dielectric layer is formed on the cap layer. A node contact hole is formed to penetrate through the second dielectric layer, the cap layer and the first dielectric layer. A liner layer is formed on a sidewall of the node contact hole. A restraining layer is formed on the second dielectric layer. A patterned conductive layer is formed on a portion of the restraining layer and fills the node contact hole. A selective hemispherical grained layer is formed on the patterned conductive layer.
摘要:
A method for forming a different width of gate spacer is disclosed. The method includes firstly forming a gate oxide layer on a semiconductor substrate. A polysilicon layer, a conductive layer, a first dielectric layer are formed in order on the gate oxide layer. The first dielectric layer, the conductive layer, the polysilicon layer, and the gate oxide layer are further etched using them as the interior gate and the peripheral gate. Next, second dielectric layer, third dielectric layer, and fourth dielectric layer are formed over the interior gate and the peripheral gate, and a first photoresist layer abuts the surface of the fourth dielectric layer of the interior circuit. Moreover, etching the fourth dielectric layer of peripheral gate to form a second spacer of peripheral gate, and etching the third dielectric layer of the peripheral gate are undertaken to form a first spacer of the peripheral gate. Removing the first photoresist layer and the fourth dielectric layer of the interior circuit, a fifth dielectric layer is formed on the third dielectric layer of the interior circuit. The fourth dielectric layer and the top surface of the second dielectric layer of the peripheral circuit are removed. The fifth dielectric layer is formed on the first dielectric layer and the third peripheral of the peripheral circuit, and then the second photoresist layer on the fifth dielectric layer, wherein the third photoresist layer is patterned as a bit-line contact via of the interior circuit and the bit-line contact vias of the peripheral circuit. Finally, anisotropically etching the third photoresist layer and the fifth dielectric layer, a bit-line to the substrate contact via and a bit-line to the gate contact via are formed inside the fifth dielectric layer.
摘要:
A method for forming a hemispherical silicon grain (HSG) layer on a polysilicon electrode is provided. The method is suitable for a substrate, which has a dielectric layer over the substrate with an opening to expose the substrate, and a polysilicon layer is formed over the substrate. A portion of the polysilicon layer is removed above dielectric layer other than the opening region. Each sidewall of the polysilicon layer is slanted so that a trapezoidal polysilicon base is formed. A buffer layer is formed over the trapezoidal polysilicon base. An ion implantation process is performed to form an amorphous silicon layer with sufficient depth on a top surface region of the trapezoidal polysilicon base. The buffer layer includes silicon oxide or silicon nitride. During ion implantation, oxygen or nitrogen elements can also be bombarded into the amorphous silicon layer so as to buffer the amorphous silicon layer to be re-crystallized. A selective HSG layer is formed on the trapezoidal polysilicon electrode base.
摘要:
An output voltage detecting circuit includes a conducting structure, a voltage regulator, a first resistor and a second resistor. The conducting structure includes a power output return terminal, a first contact and a second contact. A compensating voltage is generated between the first and second contacts when an output current flows through the first and second contacts. The voltage regulator adjusts a first current according to a voltage across a first circuit terminal and the ground terminal of the voltage regulator, thereby generating a detecting signal according to the first current. An output voltage across the positive power output terminal and the power output return terminal is subject to voltage division by the first and second resistors to generate a divided voltage. The voltage across the first circuit terminal and the ground terminal of the voltage regulator is equal to a difference between the divided voltage and the compensating voltage.
摘要:
The present invention provides a method for landing pads in the semiconductor devices, comprising the following steps: providing a semiconductor substrates with a plurality of active regions, a plurality of gate structures above the active regions and a plurality of source/drain regions, while each gate structure comprises a top cap layer and sidewall spacers; forming a conductive layer over the substrate; removing a portion of the conductive layer above the gate structure using the top cap layer of the gate structure as a stop layer, so that a height of the conductive layer is lower than a height of the gate structure; forming a patterned mask layer, right above the active regions, over the substrate; performing an etching step to define the conductive layer above the active regions; and removing the patterned mask layer and forming landing pads on the active regions.
摘要:
The present invention provides a method of forming a contact hole of a DRAM on a semiconductor wafer. The semiconductor wafer comprises a substrate, a conductive layer positioned in a predetermined area of the substrate and a dielectric layer positioned on the surface of the substrate and covering the conductive layer. The method comprises forming an amorphous silicon ( &agr;-Si) layer with an opening on the surface of the dielectric layer wherein the opening is positioned directly above the conductive layer and penetrates to the surface of the dielectric layer, forming a polysilicon layer uniformly on the surface of the amorphous silicon layer and performing a dry etching process to form a contact hole in the dielectric layer, the amorphous silicon layer and the polysilicon layer being used as a hard mask, the contact hole penetrating through the dielectric layer down to the surface of the conductive layer. The polysilicon layer is formed by performing a hemi-spherical grain (HSG) process to improve the resolution limit of the optical exposure tool of the lithographic process.
摘要:
A method for forming a multi-layered liner on the sidewalls of a node contact opening includes the steps of providing a substrate having a dielectric layer thereon. The dielectric layer further includes a node contact opening that exposes a portion of the substrate. A first liner layer is then formed on the sidewalls of the node contact opening. Next, a second liner layer is formed over the first liner layer such that the first liner layer and the second liner layer together form a dual-layered liner. The first liner layer in contact with the dielectric layer has good insulation capacity while the second liner layer has good etch-resisting property.