摘要:
A light-sensing diode having improved efficiency due to an extended junction geometry that provides more than one level of interaction with the light input.
摘要:
A densely integrated pixel, fabricated by CMOS technology, comprises a photodiode formed by a n-well, with cathode, surrounded by a p-well; a reset MOS transistor formed such that its polysilicon gate is positioned, for diode control, across the junction formed by p-well and n-well regions, and its source is merged with the photodiode cathode; and a sensing MOS transistor formed such that its source is combined with the drain of the reset transistor and its gate is electrically connected to the source of the reset transistor. In the pixel of the invention, the photodiode leakage current is greatly reduced, because no n+/p-well junction is connected to the photodiode, and the fill factor is improved, because the pixel size is much reduced.
摘要翻译:由CMOS技术制造的密集集成的像素包括由n阱形成的光电二极管,阴极由p阱包围; 复位MOS晶体管形成为使得其多晶硅栅极被定位用于二极管控制,跨越由p阱和n阱区域形成的结,并且其源极与光电二极管阴极合并; 以及形成为使得其源极与复位晶体管的漏极组合的感测MOS晶体管,并且其栅极电连接到复位晶体管的源极。在本发明的像素中,光电二极管的漏电流大大降低,因为没有 n + / p-阱结连接到光电二极管,并且填充因子得到改善,因为像素尺寸大大降低。
摘要:
A light-sensing diode fabricated in a semiconductor substrate having a surface protected by an insulator, comprising a first region of one conductivity type in this substrate, a second region of the opposite conductivity type forming a junction with the first region in the substrate; this junction having a convoluted shape, providing two portions generally parallel to the surface, and a constricted intersection with the surface; and a gate for applying electrical bias across the junction, this gate positioned on the insulator such that it covers all portions of the junction intersection with the surface, thereby creating a gate-controlled photodiode.
摘要:
A method for the fabrication of a light-sensing diode in a high-resistivity semiconductor substrate. A high-energy implant of ions into the substrate is patterned to form an annular well of the same conductivity type as the substrate; followed by a second high-energy implant of the opposite conductivity type, within the center of the annulus; followed by a third implant, of lower energy and high dosage, to form a region of the first conductivity type extending laterally near the substrate surface. The resulting diode junction is thereby patterned to include two planes near the substrate surface, allowing incident light to traverse the junction twice.
摘要:
A ferro-electric memory device system and method is described for accessing and sensing memory cells of an FeRAM memory array with an open bit line architecture. The memory device permits the sharing of certain memory circuits such as, a data buffer, and a sense amplifier between several segments of an array of FeRAM memory cells associated with a plurality of plate lines and/or word lines of the array. Various combinations of segmented bit lines, segmented plate lines and/or segmented word lines facilitate sharing the memory circuits of the device between the array segments or multiple arrays of memory cells.
摘要:
A ferro-electric memory device system and method is described for accessing and sensing memory cells of an FeRAM memory array with an open bit line architecture. The memory device permits the sharing of certain memory circuits such as, a sense amplifier, a data buffer, and a dummy cell between several segments of an array of FeRAM memory cells associated with a pair of bitlines of the array. Various combinations of segmented bit lines and/or segmented word lines facilitate sharing the memory circuits of the device between the array segments or multiple arrays of memory cells.
摘要:
A semiconductor device fabrication process comprising the following sequential steps:Sequential formation of an oxide layer and first layer of masking material resistant both to oxidation (particularly preventing the action of oxidants, such as water vapors and O.sub.2) and heat, on a principal plane of semiconductor substrate;Patternwise removal of these two layers in overlapping positions to form wells with the above semiconductor substrate exposed at bottom;Selective removal of the above oxide layer only around the wells thus formed to leave recesses;Deposition of the second layer of masking material resistant both oxidation and heat on the exposed surfaces of semiconductor substrate at the bottom of the above wells and in the recesses that are left after the above selective removal of oxide layer;Removal of the above second layer of masking material from the bottom of wells with the masking material left in the above recesses; andSelective oxidation of exposed surfaces of above semiconductor substrate under masking with the first and second layers of masking material that remain.
摘要:
Memory devices and methods are disclosed for reading a restoring data from and to ferroelectric memory cells, wherein a data bit is sensed from a data memory cell, a toggle bit is sensed from a toggle memory cell, and the sensed data bit is transferred to an IO line in either inverted form or non-inverted form according to the sensed toggle bit. The sensed data bit and the toggle bit are then inverted and restored to the data and toggle memory cells so as to mitigate or reduce cell imprint.
摘要:
A circuit is designed with a first lower conductor (500) having two ends. One end of the first lower conductor is coupled to a first signal source (386). A first upper conductor (544) has two ends and is spaced apart from the first lower conductor by a distance less than an allowable spacing between adjacent lower conductors. One end of the first upper conductor is coupled to a second signal source (384). A second upper conductor (508) has two ends. One end of the second upper conductor is coupled to another end of the first lower conductor for receiving a signal from the first signal source. A second lower conductor (552) has two ends and is spaced apart from the second upper conductor by a distance less than the allowable spacing between adjacent lower conductors. One end of the second lower conductor is coupled to another end of the first upper conductor for receiving a signal from the second signal source. Since the upper and lower conductors are spaced apart by a distance less than an allowable spacing between adjacent lower conductors, layout area is conserved. Total resistance of conductors connected to each signal source is the same, so signal delay is the same.
摘要:
Memory devices and memory cell groups therefor are disclosed, which comprise series connected ferroelectric (FE) memory cells accessible using a single bitline. The cells individually comprise a transistor and an FE capacitor where a single cell within the group or array is connected to a bitline for external access during read, write, and/or restore operations. Methods are also disclosed for reading target cells in a memory cell group.