Abstract:
기판 상에 백-바이어스 영역(back-bias region)이 배치된다. 상기 기판 및 상기 백-바이어스 영역을 덮는 매립 절연 막이 형성된다. 상기 매립 절연 막 상에 상기 백-바이어스 영역과 부분적으로 중첩된 바디(body)가 형성된다. 상기 바디(body)에 접촉된 드레인(drain)이 배치된다. 상기 바디(body)의 상면 및 측면을 덮는 게이트 전극이 배치된다.
Abstract:
The present invention provides a compound tunneling field effect transistor integrated on a silicon substrate, and a method of fabricating the same. The present invention enables to increase tunneling efficiency with an abrupt band slope by forming a source region with a material having a bandgap of at least 0.4 electron volts (eV) narrower than that of silicon, to increase a driving current (ON current) by forming a channel region with a material having almost no difference in lattice constant from a source region having a high electron mobility at least 5 times higher than that of silicon, and to simultaneously increase ON/OFF current ratio to a great amount by forming a drain region with a material having a bandgap wider than or equal to that of a channel region material to restrain OFF current to the utmost. Furthermore, the present invention enables to easily form tunneling field effect transistors having various threshold voltages in accordance to the circuit designs by adding a specific material (e.g. aluminum) have an electron affinity less than that of a source region material in the process of forming a channel region.
Abstract:
The present invention relates to a silicon-compatible compound junctionless field effect transistor. The silicon-compatible compound junctionless field effect transistor operated as a device, even if the doping concentration decreases, by forming a blocking semiconductor layer having a preset energy band gap and an active layer between an active layer and a silicon substrate instead of a buried oxide layer to prevent a leakage current in the ON/OFF operations of the device, performing an integration process on a bulk silicon substrate instead of an expensive SOI substrate, and forming the active layer as a semiconductor layer having a higher electron or hole mobility compared to silicon.
Abstract:
PURPOSE: A NAND flash memory array having a star structure with a vertically stacked SSL, and a fabrication method thereof are provided to improve the compatibility for a peripheral circuit by using a NAND operation method. CONSTITUTION: Active lines(100) have a predetermined length toward a first direction. The active lines are separated from each other toward a second and a third direction. Word lines(WLs,200) are separated from each other toward the first direction. An insulating layer includes a charge storage layer. A ground selection line(400) is formed between insulating layers.
Abstract:
PURPOSE: A method for forming a contact of a 3D laminate memory array is provided to reduce processing costs and steps by forming step type contacts with different depths once regardless of the number of layers. CONSTITUTION: A plurality of semiconductor layers(10) with a step protrusion part are formed on a substrate. A first hard mask material layer is formed on a first interlayer dielectric layer. A plurality of contact hole patterns(32) are formed by etching the first hard mask material layer. A second interlayer dielectric layer fills the plurality of contact hole patterns. A second hard mask material layer is deposited on the front side of the substrate. A plurality of contact holes(70) are formed by anisotropically etching the first and second interlayer dielectric layers.