U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Bizarre Patents

Patent No. 5377411

Hair Cutting Appliance

A haircutting appliance comprises an enclosed housing having a hollow handle connecting the housing to a vacuum source to carry away cut hairs from a subject's head.

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 257/E29.246 - With two-dimensional charge carrier gas channel (e.g., HEMT; with two-dimensional charge-carrier layer formed at heterojunction interface) (EPO)


Subclass of Class 257 - Active solid-state devices (e.g., transistors, solid-state diodes)
Definition: This subclass is indented under subclass E29.242. This subclass
No. of applications: 377
Last issue date: 05/24/2012


1                    
Application No.Application TitleIssue Date
20120126243TRANSISTOR INCLUDING SHALLOW TRENCH AND ELECTRICALLY CONDUCTIVE SUBSTRATE FOR IMPROVED RF GROUNDING
Disclosed is an RF power FET or HEMT including an electrically-conductive substrate, a grounding metallization layer disposed on a bottom surface of the electrically-conductive substrate, an active area comprising at least one cell including source, gate and drain elect...
05/24/2012
20120126290NITRIDE SEMICONDUCTOR DEVICE AND METHOD FOR FABRICATING THE SAME
A nitride semiconductor device includes: a first nitride semiconductor layer; a second nitride semiconductor layer formed on the first nitride semiconductor layer and having a wider band gap than the first nitride semiconductor layer; and a third nitride semiconductor l...
05/24/2012
20120104408SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME
In an aspect of a semiconductor device, there are provided a substrate, a transistor including an electron transit layer and an electron supply layer formed over the substrate, a nitride semiconductor layer formed over the substrate and connected to a gate of the transi...
05/03/2012
20120080724SEMICONDUCTOR DEVICE
A semiconductor device includes a first semiconductor layer, a second semiconductor layer, a two-dimensional carrier gas layer, a first main electrode, a second main electrode, a first gate electrode, and a second gate electrode. The first gate electrode is provided bet...
04/05/2012
20120068227SEMICONDUCTOR DEVICE
A normally off semiconductor device with a reduced off-state leakage current, which is applicable to a power switching element, includes: a substrate; an undoped GaN layer formed above the substrate; an undoped AlGaN layer formed on the undoped GaN layer; a source elect...
03/22/2012
20120049243GAN BASED HEMTS WITH BURIED FIELD PLATES
A transistor with source and drain electrodes formed in contact with an active region and a gate between the source and drain electrodes and in contact with the active region. A first spacer layer is on at least part of the active region surface between the gate and dra...
03/01/2012
20120049955COMPOUND SEMICONDUCTOR DEVICE, METHOD OF MANUFACTURING THE SAME, POWER SUPPLY DEVICE AND HIGH-FREQUENCY AMPLIFIER
A compound semiconductor device includes a substrate having an opening formed from the rear side thereof; a compound semiconductor layer disposed over the surface of the substrate; a local p-type region in the compound semiconductor layer, partially exposed at the end o...
03/01/2012
20120049244SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME, AND POWER SUPPLY APPARATUS
A semiconductor device includes: a substrate; a semiconductor stacked structure, provided over the substrate, including an electron transit layer and an electron supply layer; a gate electrode, a source electrode, and a drain electrode provided over the semiconductor st...
03/01/2012
20120043588SEMICONDUCTOR DEVICE
A semiconductor device includes: a first semiconductor layer; a second semiconductor layer; a two-dimensional carrier gas layer; a source electrode; a drain electrode; a gate electrode; and an auxiliary electrode located above the two-dimensional carrier gas layer betwe...
02/23/2012
20120043586SEMICONDUCTOR DEVICE AND METHOD FOR MANUFACTURING THE SAME
A semiconductor device includes a substrate, a carrier transit layer disposed above the substrate, a compound semiconductor layer disposed on the carrier transit layer, a source electrode disposed on the compound semiconductor layer, a first groove disposed from the bac...
02/23/2012
20120043587SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME
A semiconductor device includes a first semiconductor layer of a first conductivity type, a second semiconductor layer formed in contact with the first semiconductor layer, and a third semiconductor layer of a second conductivity type formed in contact with the second s...
02/23/2012
20120043553Hybrid Semiconductor Device Having a GaN Transistor and a Silicon MOSFET
A hybrid device including a silicon based MOSFET operatively connected with a GaN based device....
02/23/2012
20120037958POWER ELECTRONIC DEVICE AND METHOD OF MANUFACTURING THE SAME
According to an example embodiment, a power electronic device includes a first semiconductor layer, a second semiconductor layer on a first surface of the first semiconductor layer, and a source, a drain, and a gate on the second semiconductor layer. The source, drain a...
02/16/2012
20120032232SEMICONDUCTOR DEVICE
A semiconductor device protects against concentration of electric current at a front end portion of one of the electrodes thereof The semiconductor device includes a substrate, a compound semiconductor layer formed on the substrate and having a channel layer based on a ...
02/09/2012
20120032188COMPOUND SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME
Two layers of protection films are formed such that a sheet resistance at a portion directly below the protection film is higher than that at a portion directly below the protection film. The protection films are formed, for example, of SiN film, as insulating films. Th...
02/09/2012
20120025202SEMICONDUCTOR DEVICE AND METHOD FOR FABRICATING THE SAME
A semiconductor device includes a silicon substrate; a buffer layer provided on the silicon substrate and has a band gap greater than GaN; a first GaN layer provided on the buffer layer; and a second GaN layer provided directly on the first GaN layer, a carbon concentra...
02/02/2012
20120025269SEMICONDUCTOR STRUCTURE COMPRISING PILLAR
A semiconductor structure comprises a substrate and a metal layer disposed over the substrate. The metal layer comprises a first electrical trace and a second electrical trace. The semiconductor structure comprises a conductive pillar disposed directly on and in electri...
02/02/2012
20120025271SEMICONDUCTOR WAFER, METHOD OF PRODUCING SEMICONDUCTOR WAFER, METHOD OF JUDGING QUALITY OF SEMICONDUCTOR WAFER, AND ELECTRONIC DEVICE
There is provided a high-performance compound semiconductor epitaxial wafer that has an improved linearity of the voltage-current characteristic, a producing method thereof, and a judging method thereof. Provided is a semiconductor wafer including a compound semiconduct...
02/02/2012
20120025270ENHANCEMENT-MODE HIGH-ELECTRON-MOBILITY TRANSISTOR AND THE MANUFACTURING METHOD THEREOF
This invention discloses an enhancement-mode high-electron-mobility transistor and the manufacturing method thereof. The transistor comprises an epitaxial buffer layer on a substrate, a source and drain formed in the buffer layer, a PN-junction stack formed on the buffe...
02/02/2012
20120012894PERFORMANCE OF NITRIDE SEMICONDUCTOR DEVICES
A method of forming a transistor over a nitride semiconductor layer includes surface-treating a first region of a nitride semiconductor layer and forming a gate over the first region. Surface-treating the first region can cause the transistor to have a higher intrinsic ...
01/19/2012
20120007049NITRIDE-BASED SEMICONDUCTOR DEVICE AND METHOD FOR MANUFACTURING THE SAME
The present invention provides a nitride-based semiconductor device. The nitride-based semiconductor device includes: a base substrate having a diode structure; an epi-growth film disposed on the base substrate; and an electrode part disposed on the epi-growth film, whe...
01/12/2012
20120001230Multi-gate semiconductor devices
A multi-gate semiconductor device with inter-gate conductive regions being connected to balance resistors is provided. The multi-gate semiconductor device comprises a substrate, a multilayer structure formed upon the substrate, a first ohmic electrode, a second ohmic el...
01/05/2012
20110316049NITRIDE SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME
Provided are a vertical nitride semiconductor device in which occurrence of leak currents can be suppressed, and a method for manufacturing such nitride semiconductor device. A nitride semiconductor device, which is a vertical HEMT, is provided with an nt...
12/29/2011
20110310920EPITAXIAL GROWTH OF IN-PLANE NANOWIRES AND NANOWIRE DEVICES
Exemplary embodiments provide semiconductor nanowires and nanowire devices/applications and methods for their formation. In embodiments, in-plane nanowires can be epitaxially grown on a patterned substrate, which are more favorable than vertical ones for device processi...
12/22/2011
20110303952High Electron Mobility Transistors And Methods Of Fabricating The Same
A High electron mobility transistor (HEMT) includes a source electrode, a gate electrode, a drain electrode, a channel forming layer in which a two-dimensional electron gas (2DEG) channel is induced, and a channel supplying layer for inducing the 2DEG channel in the cha...
12/15/2011
20110291159Stress release structures for metal electrodes of semiconductor devices
This invention teaches stress release metal electrodes for gate, drain and source in a field effect transistor and stress release metal electrodes for emitter, base and collector in a bipolar transistor. Due to the large difference in the thermal expansion coefficients ...
12/01/2011
20110291160FIELD EFFECT TRANSISTOR
A field effect transistor includes a nitride-based semiconductor multi-layer structure, a source electrode (108), a drain electrode (109), a protective film (110), and a gate electrode (112) that is provided in a recess structure, which is fo...
12/01/2011
20110284865HETEROJUNCTION FIELD EFFECT TRANSISTOR, METHOD FOR PRODUCING HETEROJUNCTION FIELD EFFECT TRANSISTOR, AND ELECTRONIC DEVICE
A heterojunction filed effect transistor with a low access resistance, a low on resistance, and the like, a method for producing a heterojunction filed effect transistor and an electron device are provided. In the heterojunction field effect transistor, an electron tran...
11/24/2011
20110284868High Voltage III-Nitride Transistor
A high voltage durability III-nitride semiconductor device comprises a support substrate including a first silicon body, an insulator body over the first silicon body, and a second silicon body over the insulator body. The high voltage durability III-nitride semiconduct...
11/24/2011
20110284928SEMICONDUCTOR DEVICE
A semiconductor device includes a semiconductor layer stack formed on a substrate, a first ohmic electrode and a second ohmic electrode which are formed on the semiconductor layer stack, and are spaced from each other, a first control layer formed between the first ohmi...
11/24/2011
20110284862III-nitride switching device with an emulated diode
Some exemplary embodiments of a III-nitride switching device with an emulated diode have been disclosed. One exemplary embodiment comprises a GaN switching device fabricated on a substrate comprising a high threshold GaN transistor coupled across a low threshold GaN tra...
11/24/2011
20110278598SEMICONDUCTOR STRUCTURE, AN INTEGRATED CIRCUIT INCLUDING A SEMICONDUCTOR STRUCTURE AND A METHOD FOR MANUFACTURING A SEMICONDUCTOR STRUCTURE
A monolithic semiconductor structure includes a stack of layers. The stack includes a substrate; a first layer made from a first semiconductor material; and a second layer made from a second semiconductor material. The first layer is situated between the substrate and t...
11/17/2011
20110278590Semiconductor Devices Having Gates Including Oxidized Nickel and Related Methods of Fabricating the Same
Schottky barrier semiconductor devices are provided including a wide bandgap semiconductor layer and a gate on the wide bandgap semiconductor layer. The gate includes a metal layer on the wide bandgap semiconductor layer including a nickel oxide (NiO) layer. Related met...
11/17/2011
20110278647III-NITRIDE SEMICONDUCTOR ELECTRONIC DEVICE, AND METHOD OF FABRICATING III-NITRIDE SEMICONDUCTOR ELECTRONIC DEVICE
A III-nitride semiconductor electronic device comprises a semiconductor laminate provided on a primary surface of a substrate, a first electrode in contact with the semiconductor laminate, and a second electrode. The semiconductor laminate includes a channel layer and a...
11/17/2011
20110272743High Electron Mobility Transistors Including Lightly Doped Drain Regions And Methods Of Manufacturing The Same
High electron mobility transistors (HEMTs) including lightly doped drain (LDD) regions and methods of manufacturing the same. A HEMT includes a source, a drain, a gate, a channel supplying layer for forming at least a 2-dimensional electron gas (2DEG) channel, and a cha...
11/10/2011
20110272742COMPOUND SEMICONDUCTOR DEVICE AND METHOD OF MANUFCTURING SAME
A compound semiconductor device includes a substrate; a compound semiconductor layer formed on the substrate; a first insulating film formed on the compound semiconductor layer; a second insulating film formed on the first insulating film; and a gate electrode, a source...
11/10/2011
20110272740FIELD EFFECT TRANSISTOR AND METHOD OF MANUFACTURING THE SAME
A field-effect transistor includes a first semiconductor layer formed on a substrate, and a second semiconductor layer. The first semiconductor layer has a containing region provided as an isolation region which contains non-conductive impurities, and a non-containing r...
11/10/2011
20110260174GaN BASED POWER DEVICES WITH INTEGRATED PROTECTION DEVICES: STRUCTURES AND METHODS
Exemplary embodiments provide structures and methods for power devices with integrated clamp structures. The integration of clamp structures can protect the power device, e.g., from electrical overstress (EOS). In one embodiment, active devices can be formed over a subs...
10/27/2011
20110260217SEMICONDUCTOR APPARATUS AND METHOD OF MANUFACTURING THE SAME
There is provided a semiconductor apparatus capable of achieving both a reverse blocking characteristic and a low on-resistance. The semiconductor apparatus includes a first semiconductor layer including a channel layer, a source electrode formed on the first semiconduc...
10/27/2011
20110260216GaN BASED POWER DEVICES WITH INTEGRATED PROTECTION DEVICES: STRUCUTRES AND METHODS
Exemplary embodiments provide structures and methods for power devices with integrated clamp structures. The integration of clamp structures can protect the power device, e.g., from electrical overstress (EOS). In one embodiment, active devices can be formed over a subs...
10/27/2011
1                    
 
Sign InRegister
Username  
Password   
forgot password?