摘要:
A dynamic memory is provided having a cell with an improved structure and made by an improved process which substantially reduces the capacitance of the bit/sense fine connected to the cell. The cell has one field effect transistor and a storage node, and the cell structure includes a thick insulating segment located under a portion of a conductive layer or field shield and under a portion of the gate electrode of the transistor, while extending over the entire diffusion region of the bit/sense line and over substantially the entire depletion region surrounding the bit/ sense line diffusion region.
摘要:
A dynamic memory is provided having a cell with an improved structure and made by an improved process which substantially reduces the capacitance of the bit/sense fine connected to the cell. The cell has one field effect transistor and a storage node, and the cell structure includes a thick insulating segment located under a portion of a conductive layer or field shield and under a portion of the gate electrode of the transistor, while extending over the entire diffusion region of the bit/sense line and over substantially the entire depletion region surrounding the bit/ sense line diffusion region.
摘要:
Verfahren zum Herstellen von selbstausgerichteten Leitern in vertikalen, integrierten Halbleitervorrichtungen mit V-förmigen, oder rechteckigen Vertiefungen auf einer Oberfläche eines Halbleitersubstrats durch Niederschlagen einer leitenden Schicht über der Oberfläche einschließlich der Vertiefung, und Aufbringen eines eine Maske bildenden Materials über der leitenden Schicht bis eine ebene Oberfläche gebildet ist, sowie durch selektives Abätzen der Maskenschicht, bis nur noch eine Maskenschicht innerhalb der Vertiefung verbleibt und anschließend durch selektives Abätzen der danach freiliegendenTeileder leitenden Schicht.
摘要:
A sub-surface interconnection structure for coupling an n-type diffusion (62) to a p-type diffusion (54). The structure is a conductor-filled trench (100) disposed between the diffusion regions. The trench has a thin dielectric layer (110) on its sidewalls and bottom. The conductor (120) within the trench contacts the diffusion regions. Parasitic device formation between the diffusion regions is suppressed because the trench provides a parasitic gate that is shorted to the parasitic source regions (i.e., the coupled diffusion regions). Moreover, the trench provides an enlarged contact to the coupled diffusion regions for the subsequently-applied metal layer.
摘要:
A semiconductor trench capacitor structure (240) having a self-aligned isolation structure formed within the trench. The trench isolation structure consists of a thick isolating layer (340, 360) formed along the upper portion of the trench side walls. The trench isolation structure facilitates the construction of trench capacitors of greater storage capacity in a given space and allows the capacitors to abut adjacent capacitors and other devices.
摘要:
A one-device shared trench memory cell, in which the polysilicon (22,24) and dielectric layers (26,26A) within the trench (20) extend above the surface of the trench to form a mandrel structure. A layer of polysilicon is conformably deposited on the mandrel structure. Dopant ions are diffused from the doped polysilicon within the trench to the conformal polysilicon layer, and from the conformal polysilicon layer to a portion of the substrate disposed thereunder (36). The conformal polysilicon is etched in a solvent that preferentially attacks undoped polysilicon, to provide a bridge contact (30) that is self-aligned to the polysilicon within the trench and to the diffusion region. A plurality of FETs formed on either side of the trench, by use of a sidewall-defined gate electrode (34) to maximize density. The cell produces a "poly-to-poly" and "poly-to-substrate" storage capacitor combination that maximizes charge storage capability.
摘要:
A memory array is provided which includes a common sense line (SL) to which is connected first and second series of cells, each cell of each series includes a storage capacitor (C), switching means (T) and a bit line (BL) connected to a plate of the storage capacitor (C), with a common word line (WL) connected to the control electrodes of each of the switching means. The switching means, preferably field effect transistors, of each series of cells have progressively higher threshold voltages beginning at the sense line, and the voltage applied to the common word line has a magnitude greater than that of the highest threshold voltage. Data is stored into or read from the storage capacitors by selecting the common word line and the bit line of the desired cell in a sequential manner.
摘要:
A memory cell (10) formed in a groove or trench (18) in a semiconductor substrate (26) is provided which includes a storage capacitor (30) located at the bottom and along the lower portion of the sidewalls of the trench, a bit/sense line (32) disposed at the surface of the semiconductor substrate adjacent to the trench, a transfer device (34) or transistor located on the sidewall of the trench between the capacitor and the bit/sense line and a field (36) for electrically isolating the storage capacitor from an adjacent cell formed in the same semiconductor substrate.