摘要:
A method for fabricating a crown-shaped capacitor includes providing a first dielectric layer with a protective pillar formed thereover, including a first conductive layer, a protective layer, and a mask layer. A second conductive layer is formed over a sidewall of the protective pillar. A first capacitance layer and a third conductive layer are formed over the first dielectric layer. A sacrificial layer is formed over the third conductive layer. The sacrificial layer, the third conductive layer, the first capacitance layer, the second conductive layer, and the mask layer above the protective layer are partially removed. The second conductive layer and the third conductive are removed to form a recess adjacent to the first capacitance layer. The protective layer is removed and an opening is formed to expose the first and second conductive layers. A second capacitance layer and a fourth conductive layer are formed in the opening. The sacrificial layer is removed to expose the third conductive layer.
摘要:
A trench step channel cell transistor and a manufacture method thereof are disclosed. The transistor could be applied to increase the channel length thereof. The transistor comprises a step silicon layer formed by a selective growth, while the step silicon layer is located above the active area of the transistor.
摘要:
A method for fabricating a semiconductor device is described. A gate dielectric layer is formed on a substrate. A plurality of gate structures are formed on the gate dielectric layer. Each of the gate structures is composed of a stacked structure and a spacer. Each stacked structure includes a gate conductive layer and a cap layer. The spacer includes a first dielectric layer and a second dielectric layer. A barrier layer is formed over the substrate covering conformally the gate structures and the gate dielectric layer. A dielectric layer is formed on the barrier layer. A self-aligned contact window etching process is conducted to form a contact window opening. A SEG process is conducted to grow an epitaxial silicon layer to form a contact window and an air gap in the opening.
摘要:
A deep trench capacitor disposed in a deep trench in a substrate is provided. The deep trench capacitor includes a bottom electrode disposed in the substrate surrounding a bottom of the deep trench; a first conductive layer disposed in the deep trench; a capacitor dielectric layer disposed between a lower surface of the deep trench and the first conductive layer; a second conductive layer disposed in the deep trench and above the first conductive layer; a collar oxide layer disposed between an upper surface of the deep trench and the second conductive layer; a third conductive layer disposed in the deep trench and above the second conductive layer; an isolation structure disposed in parts of the third conductive layer, the second conductive layer and the substrate; and an isolation layer disposed below the isolation structure and in parts of the second conductive layer and the substrate.
摘要:
A method of fabrication deep trench capacitors includes forming a plurality of deep trenches in a substrate. A bottom electrode is formed in the substrate surrounding the bottom of each deep trench. A capacitor dielectric layer and a first conductive layer are formed at the bottom of each deep trench. A collar oxide layer is formed on the sidewall of the deep trench exposed by the first conductive layer. A second conductive layer fills each deep trench. An opening is formed in a region predetermined for an isolation structure between adjacent deep trenches, wherein the depth of the opening is greater than that of the isolation structure. An isolation layer is filled in the opening.
摘要:
A method of fabricating a deep trench capacitor is provided. A substrate with a deep trench thereon is provided. A bottom electrode is formed at a bottom of the deep trench and a capacitor dielectric layer, a first conductive layer, a protective layer and a collar layer are sequentially formed on the surface of the deep trench. The protective layer and the collar oxide layer on the surface of the first conductive layer are removed, material is deposited into the deep trench to form a material layer. A portion of the material layer is removed to form a first opening. Thereafter, collar oxide layer and the protective layer not covered by the material layer is removed. A portion of the mask layer and the protective layer on the sidewall of the first opening is removed to form a second opening. After removing the material layer, a second conductive layer and a third conductive layer are sequentially formed in the deep trench.
摘要:
An apparatus for preparing an ultra-thin specimen with a polishing wheel is developed. The apparatus includes a base, a holding unit mounted on the base and having a movable part for supporting the specimen, and an adjusting assembly attached to the base for adjusting an orientation of the specimen relative to a top surface of the polishing wheel by providing a fine movement during polishing. The movable part of the holding unit is advantageously moved away from the adjusting assembly to enlarge the latitudinal cross-section of the apparatus so as to increase the precision of the orientation.
摘要:
A method of fabrication deep trench capacitors includes forming a plurality of deep trenches in a substrate. A bottom electrode is formed in the substrate surrounding the bottom of each deep trench. A capacitor dielectric layer and a first conductive layer are formed at the bottom of each deep trench. A collar oxide layer is formed on the sidewall of the deep trench exposed by the first conductive layer. A second conductive layer fills each deep trench. An opening is formed in a region predetermined for an isolation structure between adjacent deep trenches, wherein the depth of the opening is greater than that of the isolation structure. An isolation layer is filled in the opening.
摘要:
A method for manufacturing a shallow trench isolation structure in a deep trench and application thereof are provided, wherein the deep trench having an upper electrode and an insulation layer on the upper electrode is formed in a substrate which has a pad insulation layer. The method comprises the following steps: forming a hard mask on the first insulation layer, doping a first portion of the hard mask, removing the undoped portion of the hard mask to expose a portion of the first insulation layer and reserve the first portion of the hard mask, removing the exposed portion of the first insulation layer to expose a portion of the upper electrode, and forming a conductive layer on the exposed portion of the upper electrode wherein a predetermined distance exists between the upper surface of the conductive layer and the pad insulation layer.
摘要:
A memory charge storage node (120.1, 120.2, 120.3) is at least partially located in a trench (124). The memory comprises a transistor including a source/drain region (170) present at a first side (124.1) but not a second side (124.2) of the trench. Before forming conductive material (120.3) providing at least a portion of the charge storage node, a blocking feature (704) is formed adjacent to the second side (124.2) to block the conductive material (120.3). The blocking feature can be dielectric left in the final structure, or can be a sacrificial feature which is removed after the conductive material deposition to make room for dielectric. The blocking features for multiple trenches in a memory array can be patterned using a mask (710) comprising a plurality of straight strips each of which runs through the memory array in the row direction. The charge storage node has a protrusion (120.3) at the first side of the trench adjacent to the source/drain region and also has a top surface portion (T) laterally adjacent to the protrusion. The trench sidewall has a substantially straight portion (S) on the second side (124.2) rising above the top surface portion (T). The dielectric (144.1, 144.2, 188) on the trench sidewall has a portion (188) which is thicker on the second side than on the first side of the trench.