Abstract:
An integrated circuit is provided which includes a memory (100) having multiple ports per memory cell for accessing a data bit with each of a plurality of the memory cells. Such memory includes an array of memory cells in which each memory cell includes a plural of capacitors (102) connected together as a unitary source of capacitance (S). A first access transistor (104) is coupled between a firs one of the plurality of capacitors and a first bitline (RBL) and a second access transistor (106) is coupled between a second one of th plurality of capacitors and a second bitline (WBL) In each memory cell, a gate of the first access transistor (104) is connected to a fi wordline (RWL) and a gate of the second access transistor (106) is connected to a second wordline (WWL)
Abstract:
A semiconductor device and method of manufacturing thereof are provided. A trench is formed in a semiconductor substrate. A thin oxide liner is preferably formed on surfaces of the trench. A nitride liner is formed in the trench. Charge is trapped in the nitride liner. In a preferred embodiment, the trench is filled with an oxide by an HDP process to increase the amount of charge trapped in the nitride liner. Preferably, the oxide fill is formed directly on the nitride liner.
Abstract:
A process of forming a hybrid memory cell which is scalable to a minimum feature size, F, of about 60 nm at an operating voltage of Vblh of about 1.5 V and substantially free of floating-well effects.
Abstract:
A low-GIRL current MOSFET device (90) structure and a method of fabrication thereof which provides a low-GIRL current. The MOSFET device structure contains a central gate conductor (10) whose edges may slightly overlap the source/drain diffusions (88, 88), and left and right side wing gate conductors (70,70) which are separated from the central gate conductor by a thin insulating and diffusion barrier layer (50, 52).
Abstract:
A semiconductor device, in accordance with the present invention, includes a doped semiconductor substrate (102) wherein the doping of the substrate has a first conductivity and a device region (110) formed near a surface of the substrate. The device region includes at least one device well. A buried well (104) is formed in the substrate below the device region. The buried well is doped with dopants having a second conductivity. A trench region (124) surrounds the device region and extends below the surface of the substrate to at least the buried well such that the device region is isolated from other portions of the substrate by the buried well and the trench region.
Abstract:
PROBLEM TO BE SOLVED: To provide an electrically programmable fuse structure for IC, and its manufacturing method. SOLUTION: This electrically programmable fuse has a first terminal part and second terminal part that are interconnected with fuse and elements. The first terminal part and second terminal part exist in different heights to the support surface of the fuse structure. The interconnecting fuse element connects the height difference between the height of the first terminal part and the second terminal part. While the first terminal part and second terminal part are oriented to be parallel with the support surface, the fuse element include a part oriented to be a right angle to the support surface, and also include at least one right-angled curvature portion that connects at least one of the first terminal element and second terminal element and the part of the fuse element oriented to be right angle. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor memory device in which a vertical trench semiconductor-oxide-nitride-oxide-semiconductor (SONOS) memory cell is formed in a semiconductor-on-insulator (SOI) substrate. SOLUTION: A memory cell comprises: a semiconductor-on-insulator substrate including a top semiconductor layer and a bottom semiconductor layer that are separated from each other by a buried insulating layer; and at least one vertical trench SONOS memory cell located in the semiconductor-on-insulator substrate. The at least one vertical trench SONOS memory cell comprises: a source diffusion located beneath the vertical trench; a selection gate channel located on one side of the vertical trench; an outward-diffused/Si-containing bridge located on and in contact with the selection gate channel; and a silicided doped region located adjacent to and in contact with an upper portion of the bridge. The bridge is present in the top semiconductor layer, the buried insulating layer, and the bottom semiconductor layer. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an SRAM cell design capable of simultaneously attaining high performance, low power, and small chip size by using only vertical MOSFET device including a peripheral (transmission) gate. SOLUTION: A method for forming a SRAM cell device comprises the steps of forming a pass gate FET transistor in a silicon layer formed on a flat insulating material and a parallel island, and further forming a pair of vertical pulldown FET transistors having a first common body and a first common source region. The method further forms a pulldown separation space for dividing an upper layer of a pullup and pulldown drain region of a pair of vertical pulldown FET transistor in two by etching through the upper diffusion between cross-linked inverter FET transistors, and the separation space reaches the common boby layer. The method further comprises the steps of forming a pair of vertical pullup FET transistor having a second common body and a second common drain, and connecting the FET transistor so as to form a SRAM cell. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To obtain a vertical DRAM having a self-aligned word line conductor on the sidewall of a trench by forming a word line conductor having a sidewall aligned with the sidewall of the trench. SOLUTION: A pad nitride is removed selectively depending on the oxide 240 in an STI region 228. A screen oxide is then grown and array region p-well implantation is carried out and an N+ dopant is implanted in order to form a second diffusion region 210. Subsequently, source and drain implantation is carried out in a support region in order to form a diffusion region 288 and an oxide 242 is formed on the sidewalls 219, 233 of a word line conductor 218, 232 and on the sidewall of a support gate. Finally, a bit line conductor 244 of polysilicon is deposited for planarization. Since word line resistance is decreased, a DRAM device having improved performance can be obtained.