摘要:
A method for fabricating a high-density silicon-on-insulator (SOI) cross-point memory array and an array structure are provided. The method comprises: selectively forming a hard mask on an SOI substrate, defining memory areas, active device areas, and top electrode areas; etching to remove the exposed silicon (Si) surfaces; selectively forming metal sidewalls adjacent the hard mask; filling the memory areas with memory resistor material; removing the hard mask, exposing the underlying Si active device areas; forming an overlying layer of oxide; etching the oxide to form contact holes to the active device areas; forming diodes in the contact holes; and, forming bottom electrode lines overlying the diodes.
摘要:
A 3D cross-point memory array is provided having current sensing devices connected the bit line for reading out the bit value. The 3D cross-point memory array may be configured as multiple resistive memory array layers. Electrodes, either bit lines or word lines, may be connected together between resistive memory array layers.
摘要:
A method of forming a substrate for use in IC device fabrication includes preparing a silicon substrate, including doping a bulk silicon (100) substrate with ions taken from the group of ions to form a doped substrate taken from the group of doped substrates consisting of n-type doped substrates and p-type doped substrates; forming a first relaxed SiGe layer on the silicon substrate; forming a first tensile-strained silicon cap on the first relaxed SiGe layer; forming a second relaxed SiGe layer on the first tensile-strained silicon cap; forming a second tensile-strained silicon cap on the second relaxed SiGe layer; and completing an IC device.
摘要:
Resistive cross point memory devices are provided, along with methods of manufacture and use. The memory device comprises an active layer of perovskite material interposed between upper electrodes and lower electrodes. A bit region located within the active layer at the cross point of an upper electrode and a lower electrode has a resistivity that can change through a range of values in response to application of one, or more, voltage pulses. Voltage pulses may be used to increase the resistivity of the bit region, decrease the resistivity of the bit region, or determine the resistivity of the bit region. Memory circuits are provided to aid in the programming and read out of the bit region.
摘要:
A temperature compensated RRAM sensing circuit to improve the RRAM readability against temperature variations is disclosed. The circuit comprises a temperature dependent element to control the response of a temperature compensated circuit to generate a temperature dependent signal to compensate for the temperature variations of the resistance states of the memory resistors. The temperature dependent element can control the sensing signal supplied to the memory resistor so that the resistance states of the memory resistor are compensated against temperature variations. The temperature dependent element can control the reference signal supplied to the comparison circuit so that the output signal provided by the comparison circuit is compensated against temperature variations. The temperature dependent element is preferably made of the same material and process as the memory resistors.
摘要:
A method of forming a silicon-germanium layer on an insulator includes depositing a layer of silicon-germanium on a silicon substrate to form a silicon/silicon-germanium portion; implanting hydrogen ions into the silicon substrate between about 500 Å to 1 μm below a silicon-germanium/silicon interface; bonding the silicon/silicon-germanium portion to an insulator substrate to form a couplet; thermally annealing the couplet in a first thermal annealing step to split the couplet; patterning and etching the silicon-germanium-on-insulator portion to remove portions of the silicon and SiGe layers; etching the silicon-germanium-on-insulator portion to remove the remaining silicon layer; thermally annealing the silicon-germanium-on-insulator portion in a second annealing step to relaxed the SiGe layer; and depositing a layer of strained silicon about the SiGe layer.
摘要:
A device and associated method are provided for fabricating a liquid phase epitaxial (LPE) Germanium-on-Insulator (GOI) photodiode with buried high resistivity Germanium (Ge) layer. The method provides a silicon (Si) substrate, and forms a bottom insulator overlying the Si substrate with a Si seed access area. Then, a Ge P-I-N diode is formed with an n +-doped (n+) mesa, a p+-doped (p+) Ge bottom insulator interface and mesa lateral interface, and a high resistivity Ge layer interposed between the p+ Ge and n+ Ge. A metal electrode is formed overlying a region of the p+ Ge lateral interface, and a transparent electrode is formed overlying the n+ Ge mesa. In one aspect, the method deposits a silicon nitride layer temporary cap overlying the high resistivity Ge layer, and an annealing is performed to epitaxially crystallize the Ge bottom interface and high resistivity Ge layer.
摘要:
A non-volatile memory resistor cell with a nanotip electrode, and corresponding fabrication method are provided. The method comprises: forming a first electrode with nanotips; forming a memory resistor material adjacent the nanotips; and, forming a second electrode adjacent the memory resistor material, where the memory resistor material is interposed between the first and second electrodes. Typically, the nanotips are iridium oxide (IrOx) and have a tip base size of about 50 nanometers, or less, a tip height in the range of 5 to 50 nm, and a nanotip density of greater than 100 nanotips per square micrometer. In one aspect, the substrate material can be silicon, silicon oxide, silicon nitride, or a noble metal. A metalorganic chemical vapor deposition (MOCVD) process is used to deposit Ir. The IrOx nanotips are grown from the deposited Ir.
摘要:
A method of fabricating a low, dark-current germanium-on-silicon PIN photo detector includes preparing a P-type silicon wafer; implanting the P-type silicon wafer with boron ions; activating the boron ions to form a P+ region on the silicon wafer; forming a boron-doped germanium layer on the P+ silicon surface; depositing an intrinsic germanium layer on the born-doped germanium layer; cyclic annealing, including a relatively high temperature first anneal step and a relatively low temperature second anneal step; repeating the first and second anneal steps for about twenty cycles, thereby forcing crystal defects to the P+ germanium layer; implanting ions in the surface of germanium layer to form an N+ germanium surface layer and a PIN diode; activating the N+ germanium surface layer by thermal anneal; and completing device according to known techniques to form a low dark-current germanium-on-silicon PIN photodetector.
摘要:
A photovoltaic (PV) structure is provided, along with a method for forming a PV structure with a conductive nanowire array electrode. The method comprises: forming a bottom electrode with conductive nanowires; forming a first semiconductor layer of a first dopant type (i.e., n-type) overlying the nanowires; forming a second semiconductor layer of a second dopant type, opposite of the first dopant type (i.e., p-type), overlying the first semiconductor layer; and, forming a top electrode overlying the second semiconductor layer. The first and second semiconductor layers can be a material such as a conductive polymer, a conjugated polymer with a fullerene derivative, and inorganic materials such as CdSe, CdS, Titania, or ZnO. The conductive nanowires can be a material such as IrO2, In2O3, SnO2, or indium tin oxide (ITO).