摘要:
An energy relieving, redundant crack stop and the method of producing the same is disclosed. The redundant pattern allows the crack propagating energy that is not absorbed by the first ring of metallization to be absorbed by a second area of metallization and also provides a greater surface area over which the crack producing energy may be spread. The redundant crack stop is produced during the metallization process along with the rest of the wiring of the chip surface and, therefore, no additional production steps are necessary to form the structure.
摘要:
A transistor structure includes a gate trench. The gate trench includes a bottle-shape bottom. The bottle-shape bottom includes a first conductive material wider than its top. The top includes a second material in a substrate, a gate structure on the gate trench and electrically connected to the first conductive material, a source/drain doping region adjacent to the gate trench and a gate channel between the source/drain doping region.
摘要:
A memory structure disclosed in the present invention features a control gate and floating gates being positioned in recessed trenches. A method of fabricating the memory structure includes the steps of first providing a substrate having a first recessed trench. Then, a first gate dielectric layer is formed on the first recessed trench. A first conductive layer is formed on the first gate dielectric layer. After that, the first conductive layer is etched to form a spacer which functions as a floating gate on a sidewall of the first recessed trench. A second recessed trench is formed in a bottom of the first recessed trench. An inter-gate dielectric layer is formed on a surface of the spacer, a sidewall and a bottom of the second recessed trench. A second conductive layer formed to fill up the first and the second recessed trench.
摘要:
A method of fabricating a semiconductor device having a trench gate is provided. First, a semiconductor substrate having a trench etch mask thereon is provided. The semiconductor substrate is etched to form a first trench having a first depth using the trench etch mask as a shield. Impurities are doped into the semiconductor substrate through the first trench to form a doped region. The doped region and the semiconductor substrate underlying the first trench are etched to form a second trench having a second depth greater than the first depth, wherein the second trench has a sidewall and a bottom. A gate insulating layer is formed on the sidewall and the bottom of the second trench. A trench gate is formed in the second trench.
摘要:
A method for forming a semiconductor memory device with a recessed gate is disclosed. A substrate with a pad layer thereon is provided. The pad layer and the substrate are patterned to form at least two trenches. A deep trench capacitor is formed in each trench. A protrusion is formed on each deep trench capacitor, wherein a top surface level of each protrusion is higher than that of the pad layer. Spacers are formed on sidewalls of the protrusions, and the pad layer and the substrate are etched using the spacers and the protrusions as a mask to form a recess. A recessed gate is formed in the recess.
摘要:
A method of fabricating self-aligned gate trench utilizing TTO poly spacer is disclosed. A semiconductor substrate having thereon a pad oxide layer and pad nitride layer is provided. A plurality of trench capacitors are embedded in a memory array region of the semiconductor substrate. Each of the trench capacitors has a trench top oxide (TTO) that extrudes from a main surface of the semiconductor substrate. Poly spacers are formed on two opposite sides of the extruding TTO and are used, after oxidized, as an etching hard mask for etching a recessed gate trench in close proximity to the trench capacitor.
摘要:
A method of fabricating a semiconductor device having a trench gate is provided. First, a semiconductor substrate having a trench etch mask thereon is provided. The semiconductor substrate is etched to form a trench having a sidewall and a bottom using the trench etch mask as a shield. Impurities are doped into the semiconductor substrate through the trench to form a doped region. The semiconductor substrate underlying the trench is etched to form an extended portion. A gate insulating layer is formed on the trench and the extended portion. A trench gate is formed in the trench and the extended portion.
摘要:
A method for forming a semiconductor device. A substrate, having a plurality of deep trench capacitors therein, is provided wherein upper portions of the deep trench capacitor devices are revealed. Spacers on sidewalls of the upper portions of the deep trench capacitors are formed to form a predetermined region surrounded by the deep trench capacitor devices. The predetermined region of the substrate is etched using the spacers and the upper portions of the deep trench capacitors serve as a mask to form a recess, and a recessed gate is formed in the recess.
摘要:
A method for forming thoroughly deposited shallow trench isolation. A first oxide layer is formed conformally over the surface of a semiconductor substrate and on a trench thereon with an aspect ratio greater than 3. A liquid etching shield is filled in the trench by spin-spraying to cover the oxide layer in the trench. An etchant is then sprayed over the surface of the semiconductor substrate to remove the uncovered oxide layer and expose the surface of the semiconductor substrate. The density of the etchant is less than that of the liquid etching shield. A second oxide layer is deposited in the trench to form isolation without voids or seams.