摘要:
Flash memory device structures and methods of manufacture thereof are disclosed. The flash memory devices are manufactured on silicon-on-insulator (SOI) substrates. Shallow trench isolation (STI) regions and the buried oxide layer of the SOI substrate are used to isolate adjacent devices from one another. The methods of manufacture require fewer lithography masks and may be implemented in stand-alone flash memory devices, embedded flash memory devices, and system on a chip (SoC) flash memory devices.
摘要:
In a method of forming a semiconductor device, a wafer includes a first semiconductor region of a first crystal orientation and a second semiconductor region of a second crystal orientation. Insulating material is formed over the wafer. A first portion of the insulating material is removed to expose the first semiconductor region and a second portion of the insulating material is removed to expose the second semiconductor region. Semiconductor material of the first crystal orientation is epitaxially grown over the exposed first semiconductor region and semiconductor material of the second crystal orientation is epitaxially grown over the exposed second semiconductor region
摘要:
A semiconductor device can be formed without use of an STI process. An insulating layer is formed over a semiconductor body. Portions of the insulating layer are removed to expose the semiconductor body, e.g., to expose bare silicon. A semiconductor material, e.g., silicon, is grown over the exposed semiconductor body. A device, such as a transistor, can then be formed in the grown semiconductor material.
摘要:
A semiconductor device can be formed without use of an STI process. An insulating layer is formed over a semiconductor body. Portions of the insulating layer are removed to expose the semiconductor body, e.g., to expose bare silicon. A semiconductor material, e.g., silicon, is grown over the exposed semiconductor body. A device, such as a transistor, can then be formed in the grown semiconductor material.
摘要:
A method of making a semiconductor device begins with a semiconductor wafer that includes a first semiconductor layer overlying a second semiconductor layer. A first trench is etched in the semiconductor wafer. The first trench is filled with insulating material. A second trench is etched within the first trench and through the insulating material, such that insulating material remains along sidewalls of the first trench. The second trench exposes a portion of the second insulating layer. A semiconductor layer can then be grown within the second trench using the second semiconductor layer as a seed layer.
摘要:
A semiconductor device includes a semiconductor body having semiconductor material of a first crystal orientation. A first transistor is formed in the semiconductor material of the first crystal orientation. An insulating layer overlies portions of the semiconductor body and a semiconductor layer overlies the insulating layer. The semiconductor layer has a second crystal orientation. A second transistor is formed in the semiconductor layer having the second crystal orientation. In the preferred embodiment, the semiconductor body is (100) silicon, the first transistor is an NMOS transistor, the semiconductor layer is (110) silicon and the second transistor is a PMOS transistor.
摘要:
A method of isolating active areas of a semiconductor workpiece. Deep trenches are formed in a workpiece between adjacent first active areas, and an insulating layer and a semiconductive material are deposited in the deep trenches. The semiconductive material is recessed below a top surface of the workpiece. Shallow trenches are formed in the workpiece between adjacent second active areas, and an insulating material is deposited in the shallow trenches and in the semiconductive material recess. The deep trenches may also be formed between an adjacent first active area and second active area. The first active areas may be high voltage devices, and the second active areas may be low voltage devices. The shallow trench isolation over the recessed semiconductive material in the deep trenches is self-aligned.
摘要:
A method of fabricating a memory device in a semiconductor substrate, the device having a memory array having a plurality of memory cell transistors arranged in rows and columns. The method includes forming a plurality of tunneling field effect transistors, forming a first well of the second doping type, forming a second well of the first doping type surrounding the first well, forming a first word line connected to a first row of memory cell transistors, forming a first bit line to control a voltage of doped drain regions of tunneling field effect transistors of a first column of memory cell transistors, and forming a second bit line parallel to the first bit line.
摘要:
An integrated circuit has a high voltage area, a logic area and a memory array for forming a system on a chip that includes linear, logic and memory devices. The memory array has floating gate transistors disposed in a triple well structure with a raised drain bit line 13 substantially vertically aligned with a buried source bit line 14. The memory array separates the columns with deep trenches 46 that may also be formed into charge pump capacitors.
摘要:
The invention relates to a bit line structure having a surface bit line (DLx) and a buried bit line (SLx), the buried bit line (SLx) being formed in a trench with a trench insulation layer (6) and being connected to doping regions (10) with which contact is to be made via a covering connecting layer (12) and a self-aligning terminal layer (13) in an upper partial region of the trench.