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Class 257/E21.447 - Vertical transistor, e.g., tecnetrons (EPO)


Subclass of Class 257 - Active solid-state devices (e.g., transistors, solid-state diodes)
Definition: This subclass is indented under subclass E21.446. This
No. of patents: 16
Last issue date: 04/29/2008


NumberTitleIssue Date
7364997Methods of forming integrated circuitry and methods of forming local interconnects
In one implementation, field oxide is grown within bulk semiconductive material in a first circuitry area and not over immediately adjacent bulk semiconductive material in a second circuitry area. The field oxide is etched from the first circuitry area. After the et...
04/29/2008
6696706Structure and method for a junction field effect transistor with reduced gate capacitance
An apparatus and method for a semiconductor device with reduced gate capacitance. Specifically, an n-channel or p-channel junction field effect transistor (JFET) is described comprising an appropriately doped substrate forming a drain region, an epitaxial...
02/24/2004
6690040Vertical replacement-gate junction field-effect transistor
A vertical JFET architecture. Generally, an integrated circuit structure includes a semiconductor area with a major surface formed along a plane and a first source/drain doped region formed in the surface. A second doped region forming a channel of differ...
02/10/2004
6580150Vertical junction field effect semiconductor diodes
Semiconductor diodes are diode connected vertical cylindrical field effect devices having one diode terminal as the common connection between a gate and a source/drain of the vertical cylindrical field effect devices. Methods of forming the diode connecte...
06/17/2003
6576929Silicon carbide semiconductor device and manufacturing method
A channel layer 4 is formed on an n- -type epitaxial layer 2 and first gate areas 3, and field enhanced area(s) 5 and second gate areas 6 are formed on the first gate areas 3. Furthermore, n+ -type source areas 7 and a third gate are...
06/10/2003
5861643Self-aligned JFET
A JFET device is formed on a semiconductor body comprising an active region for the junction field effect device. A drain region layer is formed below the lower portion of the active region. The top surface of the body is doped to provide a source region ...
01/19/1999
5702987Method of manufacture of self-aligned JFET
A JFET device is formed on a semiconductor body comprising an active region for the junction field effect device. A drain region layer is formed below the lower portion of the active region. The top surface of the body is doped to provide a source region ...
12/30/1997
5599724FET having part of active region formed in semiconductor layer in through hole formed in gate electrode and method for manufacturing the same
An N-type source (or drain) region is formed in the surface area of a P-type silicon substrate. A first insulation film is formed on the silicon substrate and a gate electrode is formed on the first insulation film. A second insulation film is formed on t...
02/04/1997
5340757Method of manufacturing a vertical field effect transistor
In the method of manufacturing a vertical field effect transistor, the gate region situated on either side of the source region projecting from a main face of a semiconductive substrate consists in implanting ions on either side of the source region to fo...
08/23/1994
5312782SOI type vertical channel field effect transistor and process of manufacturing the same
A thin film field effect transistor manufactured using a cladding technique wherein parasitic capacities of the source and drain with respect to the ground are low and a substrate biasing effect is low. The vertical channel field effect transistor compris...
05/17/1994
4505022Junction vertical field effect transistor and process for the production thereof
This transistor comprises a first main surface of alternating source and gate strips. A gate metallization rests on the gate strips and a source metallization rests on a polycrystalline silicon rail formed above the source strips. Such a device can be man...
03/19/1985
4351099Method of making FET utilizing shadow masking and diffusion from a doped oxide
A novel self-align type method of making an FET with a very short gate length and a good high frequency characteristic, and a low noise characteristic, the method comprising the steps of: forming on a silicon epitaxial layer (13) of n-type conductivity a doped...
09/28/1982
4288800Junction field effect transistor
A vertical or horizontal type junction FET including a channel-gate structure formed by a double diffusion process in which two treatments for diffusing different impurities are executed through an identical opening provided in a diffusion mask. For fabri...
09/08/1981
4181542Method of manufacturing junction field effect transistors
A vertical or horizontal type junction FET including a channel-gate structure formed by a double diffusion process in which two treatments for diffusing different impurities are executed through an identical opening provided in a diffusion mask. For fabri...
01/01/1980
4175317Method for manufacturing junction type field-effect transistors
In a method for manufacturing a junction type field-effect transistor, there is formed a gate region having one portion over which a source electrode extends and the other portion which allows an essential gate function. These portions are formed by diffu...
11/27/1979
3938241Vertical channel junction field-effect transistors and method of manufacture
The disclosed junction field-effect transistor (FET) has a precisely controlled gate configuration which enables either high power operation or high frequency operation or both. The FET is manufactured by steps including the growing of a first epitaxial l...
02/17/1976
 
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