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 257/312 - Voltage variable capacitor (i. e., capacitance varies with applied voltage)


Subclass of Class 257 - Active solid-state devices (e.g., transistors, solid-state diodes)
Definition: Subject matter wherein the device changes its capacitance
No. of patents: 187
Last issue date: 11/22/2011


1          
NumberTitleIssue Date
8063426Fast switching power insulated gate semiconductor device
An insulated gate semiconductor device (30) includes a gate (34), a source terminal (36), a drain terminal (38) and a variable input capacitance at the gate. A ratio between the input capacitance (Cfiss) when the device is on a...
11/22/2011
8013379Semiconductor variable capacitor and method of manufacturing the same
The semiconductor variable capacitor includes a capacitor including an n-well 16 formed in a first region of a semiconductor substrate 10, an insulating film 18 formed over the semiconductor substrate 10 and a gate electrode 20n...
09/06/2011
7994563MOS varactors with large tuning range
A device is presented. The device includes a substrate with a first well of a first polarity type. The first well defines a varactor region and comprises a lower first well boundary located above a bottom surface of the substrate. A second well in the varactor regio...
08/09/2011
7989868MOS varactor and fabricating method of the same
A MOS varactor for use in circuits and elements of a millimeter-wave frequency band, which is capable of reducing series resistance and enhancing a Q-factor by using a plurality of island-like gates seated in a well region of a substrate and gate contacts directly o...
08/02/2011
7960775Method for manufacturing a memory element comprising a resistivity-switching NiO layer and devices obtained thereof
The present disclosure is related to non-volatile memory devices comprising a reversible resistivity-switching layer used for storing data. The resistivity of this layer can be varied between at least two stable resistivity states such that at least one bit can be s...
06/14/2011
7952131Lateral junction varactor with large tuning range
Large tuning range junction varactor includes first and second junction capacitors coupled in parallel between first and second varactor terminals. First and second plates of the capacitors are formed by three alternating doped regions in a substrate. The second and...
05/31/2011
7902585Linear variable voltage diode capacitor and adaptive matching networks
An integrated variable voltage diode capacitor topology applied to a circuit providing a variable voltage load for controlling variable capacitance. The topology includes a first pair of anti-series varactor diodes, wherein the diode power-law exponent n for the fir...
03/08/2011
7884411Area-efficient gated diode structure and method of forming same
An area-efficient gated diode includes a semiconductor layer of a first conductivity type, an active region of a second conductivity type formed in the semiconductor layer proximate an upper surface thereof, and at least one trench electrode extending vertically thr...
02/08/2011
7821053Tunable capacitor
Disclosed are embodiments of a transistor that operates as a capacitor and an associated method of tuning capacitance within such a capacitor. The embodiments of the capacitor comprise a field effect transistor with front and back gates above and below a semiconduct...
10/26/2010
7804119Device structures with a hyper-abrupt P-N junction, methods of forming a hyper-abrupt P-N junction, and design structures for an integrated circuit
Device structures with hyper-abrupt p-n junctions, methods of forming hyper-abrupt p-n junctions, and design structures for an integrated circuit containing devices structures with hyper-abrupt p-n junctions. The hyper-abrupt p-n junction is defined in a SOI substra...
09/28/2010
7781821Parallel varactor capacitor with varying capacitance
Provided is a parallel-varactor capacitor. The capacitor comprises a first varactor and a second varactor. The first varactor has a first capacitance which varies depending on voltages applied to a first anode and a first cathode. The second varactor has a second ca...
08/24/2010
7728377Varactor design using area to perimeter ratio for improved tuning range
Parallel plate tunable varactors having a bulk capacitance contribution to a total capacitance increased compared to a fringing capacitance contribution are disclosed. The contribution of the bulk capacitance to the total capacitance of an exemplary BST varactor is ...
06/01/2010
7619273Varactor
A varactor comprising a first layer separated from a second layer by an insulating layer, wherein the first layer is a first type of semiconductor material and the second layer is a second type of semiconductor material and the insulation layer is arranged to allow ...
11/17/2009
7579644Adjustable on-chip sub-capacitor design
One or more on-chip VNCAP or MIMCAP capacitors utilize a variable MOS capacitor to improve the uniform capacitance value of the capacitors. This permits the production of silicon semiconductor chips on which are mounted capacitors having capacitive values that are p...
08/25/2009
7557400Semiconductor which a MOS capacitor is complemented with the capacitance of a wiring capacitor
A semiconductor device has a MOS capacitor in which a drain region and a source region of a MOS structure are commonly connected, and a capacitance is formed between the commonly connected drain region/source region and a gate electrode of the MOS structure; and a w...
07/07/2009
7547939Semiconductor device and circuit having multiple voltage controlled capacitors
An improved solution for performing switching, routing, power limiting, and/or the like in a circuit, such as a radio frequency (RF) circuit, is provided. A semiconductor device that includes at least two electrodes, each of which forms a capacitor, such as a voltag...
06/16/2009
7489004Micro-electro-mechanical variable capacitor for radio frequency applications with reduced influence of a surface roughness
A micro-electro-mechanical variable capacitor has a first and a second electrode, and a dielectric region arranged on the first electrode. An intermediate electrode is arranged on the dielectric region. The first electrode is fixed and anchored to a substrate, and t...
02/10/2009
7485916Dynamic control of capacitance elements in field effect structures
A field effect device includes at least one segmented field plate, each of the at least one segmented field plates having a plurality of segments that each form a plate of a capacitor, wherein the field effect device is connected to an electronic element that dynami...
02/03/2009
7459747Nonvolatile semiconductor memory device and manufacturing method of the same
The invention realizes a smaller-sized OTP memory cell and large reduction of its manufacturing process and cost. An embedded layer (BN+) to be a lower electrode of a capacitor is formed in a drain region of a cell transistor of an OTP memory, a capacitor insulation...
12/02/2008
7456464Semiconductor device including insulated gate type transistor and insulated gate type variable capacitance, and method of manufacturing the same
It is an object to obtain a semiconductor device having such a structure that respective electrical characteristics of an insulated gate type transistor and an insulated gate type capacitance are not deteriorated and a method of manufacturing the semiconductor devic...
11/25/2008
7453115Dielectric relaxation memory
A capacitor structure having a dielectric layer disposed between two conductive electrodes, wherein the dielectric layer contains at least one charge trap site corresponding to a specific energy state. The energy states may be used to distinguish memory states for t...
11/18/2008
7439819Piezoelectric-oscillator
Deterioration in frequency stability with time in a conventional piezoelectric oscillator using an accumulation type MOS capacitance element is improved. A P-channel transistor type or an N-channel transistor type is used as a MOS capacitance element in a variable c...
10/21/2008
7436015Driver for driving a load using a charge pump circuit
A charge pump circuit includes MOSFETs and MOS capacitors formed on the same substrate. Each of the MOS capacitors has a multiplicity of first electrodes formed in one region of the substrate, insulating layers formed on/above respective substrate regions between ne...
10/14/2008
7417277Semiconductor integrated circuit and method of manufacturing the same
Conventional capacitors constituted of a FET incur degradation in frequency response. A semiconductor integrated circuit includes a semiconductor substrate, an N-type FET, a P-type FET, and capacitors. The N-type FET includes N-type impurity diffusion layers, a P-ty...
08/26/2008
7388247High precision microelectromechanical capacitor with programmable voltage source
A high precision microelectromechanical capacitor with programmable voltage source includes a monolithic MEMS device having a capacitance actuator, a trim capacitor, and a high precision, programmable voltage source. The trim capacitor has a variable capacitance val...
06/17/2008
7388248Dielectric relaxation memory
A capacitor structure having a dielectric layer disposed between two conductive electrodes, wherein the dielectric layer contains at least one charge trap site corresponding to a specific energy state. The energy states may be used to distinguish memory states for t...
06/17/2008
7382014Semiconductor device with capacitor suppressing leak current
A semiconductor device with a capacitor includes a lower electrode, a dielectric and an upper electrode on the dielectric layer. The dielectric layer including more than one polycrystalline tantalum oxide layer and more than one separation layer, wherein the polycry...
06/03/2008
7378739Capacitor and light emitting display using the same
A capacitor including a polysilicon layer doped with impurities to be conductive, a first dielectric layer formed on the polysilicon layer, a first conductive layer formed on the first dielectric layer, a second dielectric layer formed on the first conductive layer,...
05/27/2008
7375376Semiconductor display device and method of manufacturing the same
A semiconductor display device with an interlayer insulating film in which surface levelness is ensured with a limited film formation time, heat treatment for removing moisture does not take long, and moisture in the interlayer insulating film is prevented from esca...
05/20/2008
7368775Single transistor DRAM cell with reduced current leakage and method of manufacture
A single transistor planar DRAM memory cell with improved charge retention and reduced current leakage and a method for forming the same, the method including providing a semiconductor substrate; forming a gate dielectric on the semiconductor substrate; forming a pa...
05/06/2008
7342314Device having a useful structure and an auxiliary structure
The present invention provides a device having a useful structure which is arranged on a substrate and has a useful structure side edge. In addition, an auxiliary structure is arranged on the substrate adjacent to the useful structure, the auxiliary structure having...
03/11/2008
7342276Method and apparatus utilizing monocrystalline insulator
A semiconductor device, including: a semiconductor material; a conductive element; and a substantially monocrystalline insulator disposed between the semiconductor material and the conductive eleme...
03/11/2008
7339238Semiconductor device including a capacitance
It is an object to obtain a semiconductor device including a capacitance having a great Q-value. In an SOI substrate comprising a support substrate (165), a buried oxide film (166) and an SOI layer (171), an isolating oxide film 167 (1...
03/04/2008
7326990Semiconductor device and method for fabricating the same
A semiconductor device includes a first hydrogen barrier film, a capacitor device formed on the first hydrogen barrier film, and a second hydrogen barrier film formed to cover the capacitor device. The first and second hydrogen barrier films each contain at least on...
02/05/2008
7323708Phase change memory devices having phase change area in porous dielectric layer
A phase change memory device includes a lower electrode and a porous dielectric layer having fine pores on the lower electrode. A phase change layer is provided in the fine pores of the porous dielectric layer. An upper electrode is provided on the phase change laye...
01/29/2008
7312487Three dimensional integrated circuit
A three dimensional (3D) integrated circuit (IC), 3D IC chip and method of fabricating a 3D IC chip. The chip includes multiple layers of circuits, e.g., silicon insulator (SOI) CMOS IC layers, each including circuit elements. The layers may be formed in parallel an...
12/25/2007
7307335Semiconductor device having MOS varactor and methods for fabricating the same
A semiconductor device with having a MOS varactor and methods of fabricating the same are disclosed. The MOS varactor includes a metal gate electrode, an active semiconductor plate interposed between the metal gate electrode and the semiconductor substrate, and a ca...
12/11/2007
7294877Nanotube-on-gate FET structures and applications
Nanotube on gate FET structures and applications of such, including n2 crossbars requiring only 2n control lines. A non-volatile transistor device includes a source region and a drain region of a first semiconductor type of material and a channel region o...
11/13/2007
7271436Flash memory devices including a pass transistor
Flash memory integrated circuit devices include an integrated circuit substrate. A cell array on the integrated circuit substrate includes a plurality of cell transistors. A bit line is coupled to ones of the plurality of cell transistors and a first pass transistor...
09/18/2007
7268646Temperature controlled MEMS resonator and method for controlling resonator frequency
There are many inventions described and illustrated herein. In one aspect, the present invention is directed to a temperature compensated microelectromechanical resonator as well as fabricating, manufacturing, providing and/or controlling microelectromechanical reso...
09/11/2007
1          
 
Sign InRegister
Username  
Password   
forgot password?