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

Icon_funbox Bizarre Patents

Patent No. 5508049

Pizza Pie With Concentric Rings of Crust

A pizza mold for forming a plurality of concentric raised ridges of dough (i.e., crust) on the surface of a pizza pie.

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 438/167 - Having Schottky gate (e.g., MESFET, HEMT, etc.)


Subclass of Class 438 - Semiconductor device manufacturing: process
Definition: Process for making a field effect transistor which possesses
No. of patents: 338
Last issue date: 04/16/2013


1                  
NumberTitleIssue Date
8420468Strain-compensated field effect transistor and associated method of forming the transistor
Disclosed are embodiments of a field effect transistor (FET) having decreased drive current temperature sensitivity. Specifically, any temperature-dependent carrier mobility change in the FET channel region is simultaneously counteracted by an opposite strain-depend...
04/16/2013
8383471Self aligned sidewall gate GaN HEMT
A method of fabricating a GaN HEMT includes growing a first epitaxial layer on a substrate, growing a second epitaxial layer on the first epitaxial layer, growing a third epitaxial layer on the second epitaxial layer, depositing a first dielectric film on the third ...
02/26/2013
8377767Insulated gate field effect transistor having passivated schottky barriers to the channel
A transistor includes a semiconductor channel disposed nearby a gate and in an electrical path between a source and a drain, wherein the channel and at least one of the source or the drain are separated by an interface layer so as to form a channel-interface layer-s...
02/19/2013
8183103Integrated circuit structure including schottky diode and method for manufacturing the same
A method for manufacturing an integrated circuit structure is disclosed. First, a dielectric layer is formed on a substrate, the substrate has a transistor region and a diode region. Next, a contact hole and an opening are formed in the dielectric layer, a size of t...
05/22/2012
8168485Semiconductor device making method
A method of making a semiconductor device includes forming a p-type semiconductor region to an n-type semiconductor substrate in such a manner that the p-type semiconductor region is partially exposed to a top surface of the semiconductor substrate, forming a Schott...
05/01/2012
8168486Methods for manufacturing enhancement-mode HEMTs with self-aligned field plate
Various embodiments of the disclosure include the formation of enhancement-mode (e-mode) gate injection high electron mobility transistors (HEMT). Embodiments can include GaN, AlGaN, and InAlN based HEMTs. Embodiments also can include self-aligned P-type gate and fi...
05/01/2012
8138033Semiconductor component and method of manufacture
A semiconductor component that includes a Schottky device, an edge termination structure, a non-Schottky semiconductor device, combinations thereof and a method of manufacturing the semiconductor component. A semiconductor material includes a first epitaxial layer d...
03/20/2012
8133775Semiconductor device with mushroom electrode and manufacture method thereof
A semiconductor device has: a semiconductor substrate having a pair of current input/output regions via which current flows; an insulating film formed on the semiconductor substrate and having a gate electrode opening; and a mushroom gate electrode structure formed ...
03/13/2012
8039328Trench Schottky device with single barrier
A process for forming a trench Schottky barrier device includes the forming of an oxide layer within the trenches in the surface of a silicon wafer, and then depositing a full continuous metal barrier layer over the full upper surface of the wafer including the tren...
10/18/2011
8008142Self-aligned Schottky diode
A Schottky barrier diode comprises a doped guard ring having a doping of a second conductivity type in a semiconductor-on-insulator (SOI) substrate. The Schottky barrier diode further comprises a first-conductivity-type-doped semiconductor region having a doping of ...
08/30/2011
7989277Integrated structure with transistors and Schottky diodes and process for fabricating the same
A process for fabricating an integrated group III nitride structure comprising high electron mobility transistors (HEMTs) and Schottky diodes, and the resulting structure, are disclosed. Integration of vertical junction Schottky diodes is enabled, and the parasitic ...
08/02/2011
7985637Manufacturing method for compound semiconductor device and etching solution
After an n-type AlGaN barrier layer (3) is formed over a substrate (1), an n-type GaN contact layer (4) is formed over the n-type AlGaN barrier layer (3). Next, the n-type GaN contact layer (4) is wet-etched with using an etching s...
07/26/2011
7972913Method for forming a Schottky diode
Improved Schottky diodes with reduced leakage current and improved breakdown voltage are provided by building a JFET with its current path of a first conductivity type serially located between a first terminal comprising a Schottky contact and a second terminal. The...
07/05/2011
7968390Electronic devices with improved ohmic contact
In one embodiment, the disclosure relates to an electronic device successively comprising from its base to its surface: (a) a support layer, (b) a channel layer adapted to contain an electron gas, (c) a barrier layer and (d) at least one ohmic contact electrode form...
06/28/2011
7902011Method of fabricating Schottky barrier transistor
Provided is a method of fabricating a Schottky barrier transistor. The method includes (a) forming a pair of cavities for forming a source forming portion and a drain forming portion having a predetermined depth and parallel to each other and a channel forming porti...
03/08/2011
7863121Method for fabricating Schottky barrier tunnel transistor
A Schottky barrier tunnel transistor includes a gate electrode, and source and drain regions. The gate electrode is formed over a channel region of a substrate to form a Schottky junction with the substrate. The source and drain regions are formed in the substrate e...
01/04/2011
7863120Liquid crystal display device with double metal layer source and drain electrodes and fabricating method thereof
A method of fabricating a liquid crystal display device includes, according to an embodiment of the present invention, forming a gate electrode on a substrate, forming a gate insulating layer over the gate electrode and on the substrate, forming a first metal layer ...
01/04/2011
7858456Merged P-i-N Schottky structure
Merged P-i-N Schottky device in which the oppositely doped diffusions extend to a depth and have been spaced apart such that the device is capable of absorbing a reverse avalanche energy comparable to a Fast Recovery Epitaxial Diode having a comparatively deeper opp...
12/28/2010
7754550Process for forming thick oxides on Si or SiC for semiconductor devices
The gate oxide in the trenches of a trench type Schottky device are formed by oxidizing a layer of polysilicon deposited in trenches of a silicon or silicon carbide substrate. A small amount of the substrate is also oxidized to create a good interface between the su...
07/13/2010
7745272Method for surfaced-passivated zinc-oxide
A semiconductor device has a heterostructure including a first layer of semiconductor oxide material. A second layer of semiconductor oxide material is formed on the first layer of semiconductor oxide material such that a two dimensional electron gas builds up at an...
06/29/2010
7674665Method of fabricating Schottky barrier transistor
Provided is a method of fabricating a Schottky barrier transistor. The method includes (a) forming a pair of cavities for forming a source forming portion and a drain forming portion having a predetermined depth and parallel to each other and a channel forming porti...
03/09/2010
7655514Method of fabricating a MESFET with a sloped MESA structure
A silicon carbide metal semiconductor field-effect transistor includes a bi-layer silicon carbide buffer for improving electron confinement in the channel region and/or a layer disposed over at least the channel region of the transistor for suppressing surface effec...
02/02/2010
7632726Method for fabricating a nitride FET including passivation layers
A method for fabricating a nitride-based FET device that provides reduced electron trapping and gate current leakage. The fabrication method provides a device that includes a relatively thick passivation layer to reduce traps caused by device processing and a thin p...
12/15/2009
7560322Method of making a semiconductor structure for high power semiconductor devices
A substrate arrangement for high power semiconductor devices includes a SiC wafer having a Si layer deposited on a surface of the SiC wafer. An SOI structure having a first layer of Si, an intermediate layer of SiO2 and a third layer of Si, has its third ...
07/14/2009
7537984III-V power field effect transistors
A field effect transistor configured for use in high power applications and a method for its fabrication is disclosed. The field effect transistor is formed of III-V materials and is configured to have a breakdown voltage that is advantageous for high power applicat...
05/26/2009
7510921Self-aligned silicon carbide semiconductor devices and methods of making the same
A self-aligned silicon carbide power MESFET with improved current stability and a method of making the device are described. The device, which includes raised source and drain regions separated by a gate recess, has improved current stability as a result of reduced ...
03/31/2009
7485512Method of manufacturing an adaptive AIGaN buffer layer
A method of compensating resistivity of a near-surface region of a substrate includes epitaxially growing a buffer layer on the substrate, wherein the buffer is grown as having a dopant concentration as dependent on resistivity and conductivity of the substrate, so ...
02/03/2009
7485513One-device non-volatile random access memory cell
One aspect of the present subject matter relates to a one-device non-volatile memory cell. The memory cell includes a body region, a first diffusion region and a second diffusion region formed in the body region. A channel region is formed in the body region between...
02/03/2009
7432142Methods of fabricating nitride-based transistors having regrown ohmic contact regions
Transistor fabrication includes forming a nitride-based channel layer on a substrate, forming a barrier layer on the nitride-based channel layer, forming a contact recess in the barrier layer to expose a contact region of the nitride-based channel layer, forming a c...
10/07/2008
7425482Non-volatile memory device and method for fabricating the same
A non-volatile memory device and a method for fabricating the same are provided. The method includes: forming a plurality of gate structures on a substrate, each gate structure including a first electrode layer for a floating gate; forming a first insulation layer c...
09/16/2008
7407859Compound semiconductor device and its manufacture
A compound semiconductor device has: a substrate; a GaN channel layer; an n-type AlqGal-qN (0
08/05/2008
7384827Method of manufacturing semiconductor device using liquid phase deposition of an interlayer dielectric
Exemplary embodiments of the invention provide techniques that enable avoidance of the concentration of an electric field at the edge of a semiconductor film in a semiconductor device such as a thin film transistor, thereby enhancing the reliability. Exemplary embod...
06/10/2008
7364988Method of manufacturing gallium nitride based high-electron mobility devices
A method of manufacturing a heterojunction device includes forming a first layer of p-type aluminum gallium nitride; forming a second layer of undoped gallium nitride on the first layer; and forming a third layer of aluminum gallium nitride on the second layer, to p...
04/29/2008
7361536Method of fabrication of a field effect transistor with materialistically different two etch stop layers in an enhanced mode transistor and an depletion mode transistor
A semiconductor structure a structure with an enhancement mode transistor device disposed in a first region and depletion mode transistor device disposed in a laterally displaced second region. The structure has a channel layer for the depletion mode and enhancement...
04/22/2008
7358907Small-sized antenna
A small-sized antenna is adapted to be mounted on a circuit substrate. The antenna has an antenna body and a resin-molded body that has a first resin-molded body and a second resin-molded body. The antenna body is sandwiched by the first and second resin-molded bodi...
04/15/2008
7352017Nitride semiconductor device and manufacturing method thereof
A nitride semiconductor device enabiling to supress current collapse and manufacturing method thereof including a III-V group nitride semiconductor layer formed of III group elements includes at least one element from the group consisting of gallium, aluminum, boron...
04/01/2008
7344898Method for manufacturing semiconductor device
After a bottom electrode film is formed, a ferroelectric film is formed on the bottom electrode film. Then, a heat treatment is performed for the ferroelectric film in an oxidizing atmosphere so as to crystallize the ferroelectric film. Then, a top electrode film is...
03/18/2008
7338826Silicon nitride passivation with ammonia plasma pretreatment for improving reliability of AlGaN/GaN HEMTs
This invention pertains to an electronic device and to a method for making it. The device is a heterojunction transistor, particularly a high electron mobility transistor, characterized by presence of a 2 DEG channel. Transistors of this invention contain an AlGaN b...
03/04/2008
7339209Integrated semiconductor structure including a heterojunction bipolar transistor and a Schottky diode
An integrated semiconductor structure includes a heterojunction bipolar transistor and a Schottky diode. The structure has a substrate, the heterojunction bipolar transistor overlying and contacting the substrate, wherein the heterojunction bipolar transistor includ...
03/04/2008
7335542Semiconductor device with mushroom electrode and manufacture method thereof
A semiconductor device has: a semiconductor substrate having a pair of current input/output regions via which current flows; an insulating film formed on the semiconductor substrate and having a gate electrode opening; and a mushroom gate electrode structure formed ...
02/26/2008
1                  
 
Sign InRegister
Username  
Password   
forgot password?