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Class 257/344 - With lightly doped portion of drain region adjacent channel (e.g., LDD structure)


Subclass of Class 257 - Active solid-state devices (e.g., transistors, solid-state diodes)
Definition: Subject matter wherein the short channel IGFET has a lightly
No. of patents: 1175
Last issue date: 04/24/2012


          11            
NumberTitleIssue Date
6885066SOI type MOSFET
A buried insulating film is formed in an LDD region between a source region and a drain region, and a non-doped silicon film is formed in the SOI layer above the buried insulating film. The SOI layer lying under the buried insulating film has a body concentration of...
04/26/2005
6881630Methods for fabricating field effect transistors having elevated source/drain regions
Field effect transistors (FETs) include an integrated circuit substrate having a surface, and a gate on the surface. A pair of recessed regions in the substrate are located beneath the surface. Respective ones of the recessed regions are located on respective opposi...
04/19/2005
6882013Transistor with reduced short channel effects and method
A method of fabricating a transistor (10) comprises forming source and drain regions (46) and (47) using a first sidewall (42) and (43) as a mask and forming a deep blanket source and drain regions (54) and (56) using...
04/19/2005
6876037Fully-depleted SOI device
The present invention is generally directed to a fully-depleted SOI device structure. In one illustrative embodiment, the device comprises first, second and third doped regions formed in the bulk substrate, wherein the dopant concentration level in the doped regions...
04/05/2005
6873011High voltage and low on-resistance LDMOS transistor having equalized capacitance
A high voltage LDMOS transistor according to the present invention includes P-field blocks in the extended drain region of a N-well. The P-field blocks form the junction-fields in the N-well for equalizing the capacitance of parasitic capacitors between the drain re...
03/29/2005
6870233Multi-bit ROM cell with bi-directional read and a method for making thereof
A multi-bit Read Only Memory (ROM) cell has a semiconductor substrate of a first conductivity type with a first concentration. A first and second regions of a second conductivity type spaced apart from one another are in the substrate. A channel is between the first...
03/22/2005
6870219Field effect transistor and method of manufacturing same
A field effect transistor includes a drain region (12) having a first portion (18) and a second portion (20), with the second portion being more lightly doped than the first portion. A channel region (14) is adjacent to the second portion...
03/22/2005
6867458Semiconductor device and method for fabricating the same
Provided is a semiconductor device having a source region formed of a semiconductor, a drain region formed of a semiconductor of the same conductive type as that of the source region, a channel region formed of a semiconductor between the source region and the drain...
03/15/2005
6864533MOS field effect transistor with reduced on-resistance
A semiconductor substrate includes a first principal plane and a second principal plane opposite this first principal plane. A first semiconductor region is formed on the first principal plane of the semiconductor substrate. Second and third semiconductor regions ar...
03/08/2005
6861704Semiconductor device and method for fabricating the same
The semiconductor device comprises a gate electrode 26 formed on a semiconductor substrate 10, a source region 45a having a lightly doped source region 42a and a heavily doped source region 44a, a drain region ...
03/01/2005
6861684Method of fabricating a vertical insulated gate transistor with low overlap of the gate on the source and the drain, and an integrated circuit including this kind of transistor
The vertical transistor includes, on a semiconductor substrate, a vertical pillar 5 having one of the source and drain regions at the top, the other of the source and drain regions being situated in the substrate at the periphery of the pillar, a gate dielect...
03/01/2005
6861318Semiconductor transistor having a stressed channel
A process is described for manufacturing an improved PMOS semiconductor transistor. Recesses are etched into a layer of epitaxial silicon. Source and drain films are deposited in the recesses. The source and drain films are made of an alloy of silicon and germanium....
03/01/2005
6847080Semiconductor device with high and low breakdown voltage and its manufacturing method
The objective of this invention is to provide a semiconductor device and its manufacturing method with which the offset can be kept fixed even in high breakdown voltage MOS transistors, and that can accommodate high voltages for high breakdown voltage MOS transistor...
01/25/2005
6841826Low-GIDL MOSFET structure and method for fabrication
A low-GIDL current MOSFET device structure and a method of fabrication thereof which provides a low-GIDL current. The MOSFET device structure contains a central gate conductor whose edges may slightly overlap the source/drain diffusions, and left and right side wing...
01/11/2005
6838777Semiconductor device and method of manufacturing the same
Gate electrodes (3) are formed on a semiconductor substrate (1), each with a gate insulating film (2) interposed therebetween. A pair of offset spacers (4) are respectively formed on opposite side faces of each of the gate insulating film...
01/04/2005
6838732Semiconductor device and method for manufacturing the same
To provide a semiconductor device with reduced parasitic capacity in the vicinity of gate electrodes, and a method for manufacturing such a semiconductor device. The semiconductor device comprises a gate electrode formed on a silicon semiconductor substrate 1
01/04/2005
6835982Semiconductor devices
A SOI MOSFET 10 may be formed from silicon single crystal as a substrate body that is formed on an embedded oxide film 11. For example, a P-type body 12, a channel section 13, and N-type source region 14 and drain region 15 ...
12/28/2004
6835624Semiconductor device for protecting electrostatic discharge and method of fabricating the same
In a semiconductor device for protecting an electrostatic discharge and a method of fabricating the same, a gate electrode is disposed on a semiconductor substrate of first conductivity type, and a heavily doped region and a vertical lightly doped region surround th...
12/28/2004
6831332Microwave field effect transistor structure
A microwave transistor structure comprising: (1) a substrate having a top surface; (2) a silicon semiconductor material of a first conductivity type; (3) a conductive gate; (4) a channel region of a second conductivity type; (5) a drain region of the second conducti...
12/14/2004
6830978Semiconductor device and manufacturing method for the same
On a semiconductor substrate having a gate electrode and an LDD layer formed thereon, an SiN film to be a silicide block is formed. An opening communicating with the LDD layer is provided for the SiN film. Impurities are introduced into the LDD layer through the ope...
12/14/2004
6828629Semiconductor device and method of fabricating the same
A P-type pocket layer is formed in the surficial portion of a semiconductor substrate, a sidewall insulating film having a thickness of as thin as 10 nm or around is formed, and P is implanted therethrough to thereby form an N-type extension layer in the surficial p...
12/07/2004
6828585Thin-film transistor, method for fabricating the same, and liquid crystal display device
A thin-film transistor includes: a pair of n-type heavily doped regions that are horizontally spaced apart from each other; p-type channel regions that are located between the n-type heavily doped regions so as to face their associated gate electrodes, respectively;...
12/07/2004
6825529Stress inducing spacers
A substrate under tension and/or compression improves performance of devices fabricated therein. Tension and/or compression can be imposed on a substrate through selection of appropriate gate sidewall spacer material disposed above a device channel region wherein th...
11/30/2004
6825506Field effect transistor and method of fabrication
The present invention is a novel field effect transistor having a channel region formed from a narrow bandgap semiconductor film formed on an insulating substrate. A gate dielectric layer is formed on the narrow bandgap semiconductor film. A gate electrode is then f...
11/30/2004
6822297Additional n-type LDD/pocket implant for improving short-channel NMOS ESD robustness
A short-channel NMOS transistor in a p-well, bordered laterally on each side by an isolation region and vertically by a channel stop region, has a n-source and a n-drain, each comprising a shallow region extending to the transistor gate and a deeper region recessed ...
11/23/2004
6818488Process for making a gate for a short channel CMOS transistor structure
The invention relates to a process for making a gate for a CMOS transistor structure, made from a stack realized on a face in a semi-conducting material of a substrate, said stack comprising a gate isolation layer, a gate material layer and a gate mask in sequence, ...
11/16/2004
6815797Silicide bridged anti-fuse
A silicide bridged anti-fuse and a method of forming the anti-fuse are disclosed. The silicide bridged anti-fuse can be formed with a tungsten plug metalization process that does not require any additional process steps. As a result, anti-fuses can be added to an el...
11/09/2004
6815770MOS transistor having reduced source/drain extension sheet resistance
The present invention provides a novel MOS transistor structure. The MOS transistor includes a gate electrode formed on a semiconductor substrate, and a gate oxide layer formed between the gate electrode and the semiconductor substrate. A spacer is formed on each si...
11/09/2004
6815765Semiconductor device with function of modulating gain coefficient and semiconductor integrated circuit including the same
A semiconductor device has a structure in which an impurity diffusion region with an impurity concentration lower than an impurity concentration of a source and a drain is formed between the source and drain and a channel below the gate, having an asymmetric shape w...
11/09/2004
6809343Electro luminescence display device
There is provided an electronic device having high reliability and high color reproducibility. A pixel structure is made such that a switching FET (201) and an electric current controlling FET (202) are formed on a single crystal semiconductor substrat...
10/26/2004
6800891Self-aligned source pocket for flash memory cells
An improved method for forming a flash memory is disclosed. A self-aligned source implanted pocket located underneath and around the source line junction is formed after the field oxide between adjacent word lines is removed, and before or after the self-aligned sou...
10/05/2004
6794714Transistor and method for fabricating the same
A transistor and a method for fabricating the same that involves a forming a device isolation oxide film semiconductor substrate, forming an opening in the device isolation oxide to open the substrate and define an active region, the junction between the oxide and t...
09/21/2004
6787849Semiconductor devices and methods of manufacturing the same
Embodiments include a semiconductor device including a well structure such that well areas can be formed with a higher density of integration and a plurality of high-voltage endurable transistors can be driven independently of one another with different voltages, an...
09/07/2004
6784490High-voltage MOS transistor
A high-voltage MOS transistor wherein a dopant concentration of a source offset region is set lower than a dopant concentration of a drain offset region whereby a resistance value of the resource region is set independently of a resistance value of the drain region ...
08/31/2004
6784488Trench-gate semiconductor devices and the manufacture thereof
A metal-oxide-semiconductor trench-gate semiconductor device in which a substantially intrinsic region (40) is provided below the gate trench (20), which extends from the base of the trench, substantially across the drain drift region (14) towar...
08/31/2004
6777763Semiconductor device and method for fabricating the same
In a thin film transistor (TFT), a mask is formed on a gate electrode, and a porous anodic oxide is formed in both sides of the gate electrode using a relatively low voltage. A barrier anodic oxide is formed between the gate electrode and the porous anodic oxide and...
08/17/2004
6777711Semiconductor display device
An insulated-gate field-effect transistor adapted to be used in an active-matrix liquid-crystal display. The channel length, or the distance between the source region and the drain region, is made larger than the length of the gate electrode taken in the longitudina...
08/17/2004
6774418Low dielectric silicon oxynitride spacer films and devices incorporating such films
A method of depositing a silicon oxynitride spacer film on a gate stack in a semiconductor device involves contacting the gate stack with bistertiarybutylaminosilane (BTBAS), at least one nitrogen containing compound and oxygen (O2). The deposition is con...
08/10/2004
6770921Sidewall strap for complementary semiconductor structures and method of making same
Devices, structures, and methods for enhancing devices using dual-doped polycrystalline silicon are discussed. One aspect of the present invention includes a p-type strip having a top, a bottom, two sides, and two ends; an n-type strip having a top, a bottom, two si...
08/03/2004
6762458High voltage transistor and method for fabricating the same
In a high voltage transistor and a method for fabricating the same, a semiconductor substrate includes first, second, and third regions, the second and third regions neighboring the first region with boundaries. The first and second drift regions are respectively fo...
07/13/2004
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