摘要:
A driving device for a fluorescent tube has a high frequency oscillator which outputs a high frequency AC signal. A pulse width modulator is connected to the high frequency oscillator for outputting a PWM harmonic frequency signal. A first power switch is connected to the pulse width modulator for being turned off during a positive half-cycle of the PWM harmonic frequency signal and being turned on during a negative half-cycle of the PWM harmonic frequency signal. A second power switch is connected to the pulse width modulator for being turned on during the positive half-cycle of the PWM harmonic frequency signal and being turned off during the negative half-cycle of the PWM harmonic frequency signal. A piezoelectric transformer includes a primary winding having two input terminals connected to the first power switch and the second power switch, respectively, and a center terminal connected to the output terminal of the pulse width modulator.
摘要:
A method for fabricating a flash memory cell is described. A conformal ultra thin oxide layer is formed on a substrate having a trench formed therein, followed by forming silicon nitride spacers on the portion of the ultra thin oxide layer which covers the sidewalls of the trench. The silicon nitride spacers are separated into a first silicon nitride spacer on the right sidewall and a second silicon nitride spacer on the left sidewall. Thereafter, a gate oxide layer is formed on the silicon nitride spacers, followed by forming a polysilicon gate on the gate oxide layer in the substrate. Subsequently, a source/drain region is formed on both sides of the polysilicon gate in the substrate.
摘要:
A structure of an ESD protection device located between a pad and an internal circuit. The structure comprises a transistor with a source and a drain connecting to the ground, and an N+ resistor with its cross section comprising an N-well, a P-type doped region located in the N-well, and an N+ doped region located in the P-type doped region. The N+ doped region has a first terminal and a second terminal. The first terminal is connected electrically to the drain and the pad, while the second terminal is connected to the internal circuit.
摘要翻译:位于焊盘和内部电路之间的ESD保护器件的结构。 该结构包括具有连接到地的源极和漏极的晶体管,并且N +电阻器的横截面包括N阱,位于N阱中的P型掺杂区域和位于N阱中的N +掺杂区域 P型掺杂区域。 N +掺杂区域具有第一端子和第二端子。 第一端子与漏极和焊盘电连接,而第二端子连接到内部电路。
摘要:
In a method for fabricating a ULSI MOSFET with SOI structure, an additional polysilicon layer is used to form polysilicon/metal compound metal contacts on source and drain regions and a gate so as to avoid leakage current and short channel effect problems.
摘要:
The invention relates to an improved MOSFET device structure for use in ultra large scale integration and the method of forming the device structure. A local punchthrough stop region is formed directly under the gate electrode using ion implantation. The local punchthrough stop region reduces the expansion of the depletion region in the channel and thereby increases the punchthrough voltage. The local punchthrough stop region is self-aligned with the gate electrode and source/drain region so that critical spacings are maintained even for sub micron devices. The source and drain junction capacitances are also reduced. The invention can be used in either N channel or P channel MOSFET devices. The invention can be used with a conventional source/drain structure as well as a double doped drain structure and a light doped drain structure.
摘要:
In a method for fabricating a ULSI MOSFET, an additional polysilicon layer is used to form polysilicon/metal compound metal contacts on source and drain regions and a gate so as to avoid leakage current and short channel effect problems.
摘要:
This invention provides a method of forming a field implant channel stop region and a device using a field implant channel stop region to improve isolation between devices in integrated circuits using field effect transistors. The field implant channel stop region is formed without the use of an extra mask or extra masking steps by means of either a large angle tilted ion implant beam or a higher energy normally directed ion implant beam. The field implant channel stop region is formed with the mask used to form the light doped drain region in place. The field implant channel stop region forms a local increase in the doping level in the device well thereby forming the channel stop region.
摘要:
A method of forming field oxide isolation regions for submicron technology using oxygen implantation is described. A first insulating layer is formed over a silicon substrate. A second insulating layer is formed over the first insulating layer. A first opening is formed in the first and second insulating layers. Sidewall spacers are formed on the vertical surfaces of the first and second insulating layers, within the first opening, to define a second, smaller opening. A portion of the silicon substrate is removed in the region defined by the second, smaller opening, to form an etched region of the silicon substrate. The sidewall spacers are removed. Oxygen is implanted into the etched region of the silicon substrate and into the region of the silicon substrate under the former location of the sidewall spacers. A portion of the polycrystalline silicon in and above the etched region of the silicon substrate. The field oxide isolation region is formed by heating. The remainder of the first and second insulating layers are removed.
摘要:
A magnetic induction assembly includes a magnetic core, a primary winding, a secondary winding and a base. The primary winding is wound by a wire. The secondary winding is a conductive plate having an open loop and two contact ends. The base has a body having a through hollow. A surface of the body is formed with n partitions, where n is greater than or equal to 1. The partitions divide the body into n+1 winding areas for being selectively wound by the wire. Each of the partitions has a chamber, a through hole communicating with the through hollow and an opening allowing the secondary winding to enter the chamber. The magnetic core passes through the through hollow, the through holes and the loop of the conductive plate to magnetically couple with the primary winding and the secondary winding.
摘要:
A coil module includes a first coil set and a second coil set. The first coil set has an isolation frame. The second coil set has an open first winding body. The first winding body has two ends which are out of contact with each other. One of the two ends has a first conductive portion projecting from the first winding body. The other one of the two ends has a connecting end from which an open second winding body is integratedly outward extended. A terminal of the second winding body has a second conductive portion which is outward protrudent. The connecting end comprises a bent portion which makes the second winding body and the first winding body arranged in the same direction so that the second winding body and the first winding body are attached on two opposite sides of the isolation frame.