摘要:
A memory device with vertical transistors and deep trench capacitors. The device includes a substrate containing at least one deep trench and a capacitor deposited in the lower portion of the deep trench. A conducting structure, having a first conductive layer and a second conductive layer, is deposited on the trench capacitor. A ring shaped insulator is deposited on the sidewall and between the substrate and the first conductive layer. The first conductive layer is surrounded by the ring shaped insulator, and the second conductive layer is deposited on the first conductive layer and the ring shaped insulator. A diffusion barrier between the second conductive layer and the substrate of the deep trench is deposited on one side of the sidewall of the deep trench. A TTO is deposited on the conducting structure. A control gate is deposited on the TTO.
摘要:
A method of forming contact holes. A substrate on which a plurality of gate structures is formed is provided, wherein the gate structure comprises a gate, a gate capping layer, and a gate spacer. An insulating layer is formed on the gate structures and fills between the gate structures. The insulating layer is etched using the gate capping layers, the gate spacers, and the substrate as stop layers to form first contact holes between the gate structures to expose the substrate and the gate spacers and form second contact holes overlying each gate structure to expose the gate capping layers. A protective spacer is formed over each sidewall of the first contact holes and the second contact holes. The gate capping layer under each gate contact hole is etched using the protective spacer as a stop layer to expose the gate. The protective spacers are removed.
摘要:
A method of forming a bit line contact via. The method includes providing a substrate having a transistor with a gate electrode, drain region, and source region, forming a conductive layer overlying the drain region, conformally forming an insulating barrier layer overlying the substrate, blanketly forming a dielectric layer overlying the insulating barrier layer, and forming a via through the dielectric layer and insulating barrier layer, exposing the conductive layer.
摘要:
A memory device with vertical transistors and deep trench capacitors. The device includes a substrate containing at least one deep trench and a capacitor deposited in the lower portion of the deep trench. A conducting structure, having a first conductive layer and a second conductive layer, is deposited on the trench capacitor. A ring shaped insulator is deposited on the sidewall and between the substrate and the first conductive layer. The first conductive layer is surrounded by the ring shaped insulator, and the second conductive layer is deposited on the first conductive layer and the ring shaped insulator. A diffusion barrier between the second conductive layer and the substrate of the deep trench is deposited on one side of the sidewall of the deep trench. A TTO is deposited on the conducting structure. A control gate is deposited on the TTO.
摘要:
A method for forming contacts on a semiconductor device is provided. The method includes steps of forming an opening on a gate contact area, depositing a dielectric layer on a bit-line contact area and the opening, coating a photoresist to etch the dielectric layer, removing the photoresist and finally forming a conductive layer on a bit-line contact opening and a gate contact opening.
摘要:
A method of forming source/drain regions in semiconductor devices. First, a substrate having at least one gate structure is provided. Next, first, second, and third insulating spacers are successively formed over the sidewall of the gate structure. Subsequently, ion implantation is performed on the substrate on both sides of the gate structure using the third insulating spacer as a mask to form first doping regions. After the third insulating spacer is removed, ion implantation is performed on the substrate on both sides of the gate structure using the second insulating spacer as a mask to form second doping regions serving as source/drain regions with the first doping regions. Finally, after the second insulating spacer is removed, ion implantation is performed on the substrate on both sides of the gate structure using the first insulating spacer as a mask to form third doping regions, thereby preventing punchthrough.
摘要:
A fabrication method for a damascene bit line contact plug. A semiconductor substrate has a first gate conductive structure, a second gate conductive structure and a source/drain region formed therebetween. A first conductive layer is formed in a space between the first gate conductive structure and the second gate conductive structure to be electrically connected to the source/drain region. An inter-layer dielectric with a planarized surface is formed to cover the first conductive layer, the first gate conductive structure, and the second gate conductive structure. A bit line contact hole is formed in the inter-layer dielectric to expose the top of the first conductive layer. A second conductive layer is formed in the bit line contact hole, in which the combination of the second conductive layer and the first conductive layer serves as a damascene bit line contact plug.
摘要:
A manufacturing method for a MOSFET gate structure. The method comprises providing a substrate, sequentially depositing a pad layer and a dielectric layer thereon, defining a gate trench passing through the dielectric layer and the pad layer to expose a predetermined gate area of the substrate, sequentially forming a gate dielectric layer, a first conductive layer, a second conductive layer, and a cap layer on the exposed substrate in the gate trench to form a damascene gate structure, and removing the dielectric layer.
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 of forming a metal plug. First, a dielectric layer is formed on a substrate. Next, a patterned hard mask is formed on the dielectric layer. The dielectric layer is etched through the patterned hard mask to form a contact hole in the dielectric layer so as to expose parts of the substrate. An isolated layer is formed on the patterned hard mask. A barrier is then formed conformally on the isolated layer and the exposed substrate of the contact hole. A metal layer is formed to fill the contact hole and cover the barrier. A thermal treatment is performed to form a silicide between the barrier layer and the substrate. Finally, parts of the metal layer, barrier, isolated layer, and patterned hard mask are removed. The metal plug with a planar surface is thus formed in the contact hole.