Abstract:
A vertical transistor particularly suitable for high density integration includes potentially independent gate structures (3230) o opposite sides of a semiconductor pillar (2910) formed by etching in a trench. The gate structure is surrounded by insulting material (2620) which is selectively etchable to isolation material surrounding the transistor. A contact (3820) is made to the lower end of the pillar by selectively etching the isolation material selective to the insulating material. The upper end of the pillar is covered by a cap (2730) and sidewalls of selectively etchable materials so that gate and source connection openings (3720, 3620) can also be made by selective etching with good registration tolerance.
Abstract:
PROBLEM TO BE SOLVED: To provide an acceleration value and voltage measuring device, as well as, a manufacturing method of the acceleration value and voltage measuring device. SOLUTION: This acceleration value and voltage measuring device has a conductive plate on the upper face of a first insulating layer, a second insulating layer which is the second insulating layer on the upper face of the conductive plate and in which the upper face of the plate is exposed to the opening of the second insulating layer, conductive nanotubes that are bridged over the opening, and conductive contacts to the nanotubes. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide passive maximum acceleration and voltage measurement devices which are compact and do not need a power supply.SOLUTION: A device includes an electrically conductive plate 110 on a top surface of a first insulating layer 105; a second insulating layer 130 on a top surface of the conductive plate 110; and conductive nanotubes 180 suspended across an opening 135 in the second insulating layer 130. Because of acceleration perpendicular to the surface of the conductive plate 110, the nanotubes 180 are bent to be in contact with the conductive plate 110 and held by the van der Waals force.
Abstract:
PROBLEM TO BE SOLVED: To provide a gain cell for a memory circuit, a memory circuit comprising multiple gain cells, and a method of producing such gain cells and memory circuits. SOLUTION: A memory gain cell 64 includes a storage capacitor 38, a write device which is electrically coupled to the storage capacitor for charging and discharging the storage capacitor, and a read device. The read device includes one or more semiconducting carbon nanotubes 50 each of which is electrically coupled between a source and a drain. A portion of each semiconducting carbon nanotube is gated by a read gate 60 and the storage capacitor, thereby regulating a current flowing through each semiconducting carbon nanotube from the source to the drain. The current is proportional to the electrical charge stored by the storage capacitor. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a semiconductor and a device structure which suppress the latch-up in a bulk CMOS device. SOLUTION: The method includes a step of forming a trench in a semiconductor material of a substrate, while the trench has a first side wall disposed between a pair of doped wells demarcated in the semiconductor material of the substrate. The method further includes a step of forming an etching mask in the trench to mask partially the basal surface of the trench, and successively a step of removing the semiconductor material of the substrate exposing in the basal surface which has been partially masked and demarcating a second side wall which deepens the trench and has been narrowed. A dielectric material is filled in the deepened trench to demarcate trench separation regions of devices constructed in the doped wells. The dielectric material filled in the extended part of the deepened trench improves the suppression of the latch-up. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To improve a manufacturing process of a three-dimensional integrated circuit chip or a wafer assembly, and further in detail, to make it possible to process chips in an arrayed state on a wafer before arranging the chips as stack. SOLUTION: The manufacture of the three-dimensional integrated circuit is disclosed wherein chip density can be made extremely high, and the wafer can be processed while keeping a planar form as a whole. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an immersion lithography device and its method. SOLUTION: A lithographic optical column structure is disclosed for performing immersion lithography, at least on a projection optical system and a wafer of an optical system inside different fluids of equal pressure. In particular, a supercritical fluid is introduced to the periphery of the wafer with identical pressure, and another fluid, for example an inert gas, is introduced in at least the projection optical system of the optical system, thereby comprising the immersion lithography device which does not require special lenses. Furthermore, a chamber is provided which encloses the wafer to be exposed and at least a projection optical component of the optical system, and is filled with a supercritical immersion fluid. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
Non-volatile and radiation-hard switching and memory devices (225) using vertical nano-tubes (155) and reversibly held in state by van der Waals' forces and methods of fabricating the devices. Means for sensing the state of the devices include measuring capacitance, and tunneling and field emission currents.