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Topic: Schottky diode

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	Radio-Electronics.Com :: Schottky Barrier Diode
		The Schottky diode is also used in power applications as a rectifier, again because of its low forward voltage drop leading to lower levels of power loss compared to ordinary PN junction diodes.
		In fact the diode that is formed may either be a Schottky barrier diode or a standard PN junction dependent upon the way in which the wire and semiconductor meet and the resulting forming process.
		The Schottky diode may also be used as a clamp diode in a transistor circuit to speed the operation when used as a switch.
	www.radio-electronics.com /info/data/semicond/schottky_diode/schottky_barrier_diode.php (1143 words)

	Schottky Diode
		A metal-semiconductor diode is called a Schottky diode. In the idealized picture of the Schottky junction shown in Fig.
		A Schottky diode is a majority carrier device, where electron-hole recombination is usually not important. Hence, Schottky diodes have a much faster response under forward bias conditions than p-n junction diodes.
		Therefore, Schottky diodes are used in applications where the speed of a response is important, for example, in microwave detectors, mixers, and varactors.
	www.mtmi.vu.lt /pfk/funkc_dariniai/diod/schottky.htm (4251 words)

	Integrated circuit having guard ring Schottky barrier diode and method - Patent 4035907
		Integrated circuit having a guard ring Schottky barrier diode therein in which first and second layers of metallization are provided overlying the Schottky barrier diode which are brought into intimate contact with the interconnect surface to establish intimate contact between the surface of the semiconductor body and the metallization.
		The integrated circuit which includes a Schottky barrier diode is fabricated by utilizing a semiconductor body 11 in the form of a wafer of a suitable material such as P-type silicon which is provided with a planar surface 12.
		The region 39 serves as a contact to the guard ring Schottky diode formed in the left hand portion of the drawings, whereas the region 41 serves as the emitter of a Schottky clamped transistor in the right hand portion of the drawings.
	www.freepatentsonline.com /4035907.html (2296 words)

	Diode - Engineering (Site not responding. Last check: )
		The first diodes were vacuum tube devices (also known as thermionic valves), arrangements of electrodes surrounded by a vacuum within a glass envelope, similar in appearance to incandescent light bulbs.
		In vacuum tube diodes, a current is passed through the cathode, a filament treated with a mixture of barium and strontium oxides, which are rare earth metals.
		Schottky diodes are majority carrier devices and so do not suffer from minority carrier storage problems that slow down most normal diodes.
	engineering.wikia.com /wiki/Diode (2872 words)

	Diode
		There are two kinds of semiconductor diodes: a P-N junction diode, which forms an electrical barrier at the interface between N- and P-type semiconductor layers, and a Schottky diode, whose barrier is formed between metal and semiconductor regions.
		The cathode of a diode is generally marked with a line next to it (on the diode body).
		Diodes are also some times marked with an identifying color code (similar, but not identical, to that used for resistors); a good explanation is given here.
	encyclobeamia.solarbotics.net /articles/diode.html (1062 words)

	The Schottky Diode
		The Schottky diode is used to carrying the re-circulating current from the motor during the 'off-time' while the speed control is at partial throttle.
		The current flows through the Schottky diode before it will flow through the brake transistor because the forward voltage drop of a Schottky diode is less than the brake transistor diode (this is why Schottky diodes are used and not other types of power diodes).
		One reason Novak uses an external Schottky diode is because the closer the diode is to the motor, the lower the voltage drop during this period.
	www.teamnovak.com /tech_info/more_info/schottky.htm (493 words)

	American Microsemiconductor manufacturers of Diodes, Transistors, Thyristors, Triacs, Diode Array, Integrated Circuits ...
		In general, yes, however the diode is usually thought of as a signal device, with currents of 1 Amp or less; and a rectifier, a power device with currents up to 1,000 amps or more.
		However in a tunnel diode, according to quantum theory, a particle, in a highly doped diode or PN junction, can bypass this barrier by tunneling beneath the barrier, appearing instantaneously on the other side of the junction.
		A shockley diode on the other hand, also known as a four layer diode, is a thyristor that switches once its breakover voltage is reached.
	www.americanmicrosemi.com /information/faq (1488 words)

	Diode - HvWiki
		Diodes have a voltage drop, that is usually in the range of 0.3V to several volts depending on the diode.
		The schottky diode is a metal to semiconductor barrier device.
		Diodes are generally used to force current to go in one direction, although they can also be used to create a controlled voltage drop, regulate current, regulate voltage, and even provide light.
	wiki.4hv.org /index.php/Diode (1510 words)

	Diamond High Voltage Schottky Diode (Site not responding. Last check: )
		The Schottky diode was fabricated from single crystal diamond made at Element Six by chemical vapour deposition (CVD).
		This Schottky diode, along with other electronic component breakthroughs we are making in the semiconductor market, is stimulating awareness of diamond as a new engineering material with vast potential.
		Schottky diodes will be the first of many new electronic products”.
	www.e6.com /e6/page.jsp?pageid=1207 (433 words)

	Diodes Basics
		For the diode to switch OFF, the charge carriers must either recombine (minority) or be removed, the latter mechanism appearing as a reverse current (reverse recovery) flowing in the diode as it turns OFF.
		Diodes are not only supplied as single components but can be purchased in modules such as single and three phase rectifiers.
		Because the exact characteristics of each individual diode cannot be guaranteed to be the same it is prudent to include additional simple circuitry to ensure reverse voltage and forward current sharing occurs.
	www.powerdesigners.com /InfoWeb/design_center/articles/Diodes/diodes.shtm (1614 words)

	Schottky diode-based noise-removing semiconductor device and fabrication method therefor patent invention
		Further, if the schottky diode is reverse-biased with a voltage higher than a certain voltage V2, breakdown currents flow in the schottky diode due to the breakdown phenomena in the schottky diode.
		is not input to the circuit system connected to the schottky diode since currents flow to the ground due to the short-circuit of the schottky diode.
		An aspect of the present invention is to provide a semiconductor device using schottky diodes of which the same electrodes are connected to each other and which is capable of rectifying digital signals and analog signals, and a fabrication method therefor, in order to remove noise.
	www.freshpatents.com /Schottky-diode-based-noise-removing-semiconductor-device-and-fabrication-method-therefor-dt20060817ptan20060181824.php (1121 words)

	EETimes.com - Schottky diode saves power in EPC Gen 2 chip from TI
		The Schottky diode is "a very efficient rectifier," said Tony Sabetti, TI's director of RFID retail supply chain products.
		When the chip is turned on, the diode allows for only a small voltage drop, which results in little power loss, he said.
		The use of the Schottky diode improves RF conversion, thus increasing chip-to-reader sensitivity.
	www.eetimes.com /issue/mn/showArticle.jhtml?articleID=191600020 (544 words)

	== Diodes ==
		Traditionally diodes from one of two families are used in these applications: the pn-junction diode and the Schottky Barrier diode.
		The Schottky diode came first: in 1926, followed by the pn junction diode in 1940.
		Diodes Incorporated has embodied all these desirable functions into a single component, which, through increased efficiency of power-conditioning circuits will increase the value of subsystem design, and through features traditionally incompatible in a single component, permit the development and integration of systems previously not considered.
	www.diodes.com /products/sbr_product_information.html (634 words)

	SWDNZ1004 200mA 4 channels ESD PROTECTED SCHOTTKY DIODE ARRAY, QSBT40 EQUIVALENT
		Schottky diode termination is the best overall solution for applications in which power consumption and noise immunity are critical considerations.
		Clamp Schottky diode networks provide optimized lead inductance and parasitic capacitive effects (see added ground pins), improved forward voltage and crosstalk attributes, and best termination performance characteristics at high data transmission rates.Schottky diode networks are manufactured using Semiconwell's in house high reliability semiconductor manufacturing processes.
		Schottky diode networks are manufactured using Semiconwell's in house high reliability semiconductor manufacturing processes.
	www.semiconwell.com /d_net/swdnz1004.htm (1166 words)

	SiC Schottky Barrier Diode Development at Purdue (Site not responding. Last check: )
		Schottky barrier diodes (SBD's) are used as high-voltage rectifiers in many power switching applications.
		PN junction diodes could be used for this application, but they store minority carriers when forward biased, and extraction of these carriers allows a large transient reverse current during switching.
		Schottky barrier diodes are rectifying metal-semiconductor junctions, and their forward current consists of majority carriers injected from the semiconductor into the metal.
	www.ecn.purdue.edu /WBG/Device_Research/Schottky_Diodes/Index.html (694 words)

	Diodes & RF/Microwave Operation
		The diode capacitance at low frequencies is different from the capacitance well above Fcs where it is the same as the depleted (large reverse bias) low frequency value (even with no bias).
		All of these simple schottky diodes have a reverse break down voltage in the 3 to 9 volt range.
		When Schottky diodes are used in mixers the mixer performance has limitations because of space charge current limiting.
	www.pacificsites.com /~brooke/Diodes.html (1457 words)

	SiC Schottky Diodes Tout Breakdown Voltage
		Schottky diodes traditionally have been used for their high efficiency in low-voltage (5-V to 40-V) power applications where their “near zero” switching speed makes them the most cost-effective solution.
		Cree's Palmour explains that the switching characteristics of SiC Schottky diodes are unaffected by temperature, di/dt (the rate of change in switching current) or forward current, all of which increase reverse recovery current in silicon diodes.
		Schottky diodes fabricated in silicon are unwieldy and expensive above 100 V, so designers have used bipolar, silicon-based PIN diodes, which offer higher current density and lower resistance per square centimeter,” Palmour notes.
	powerelectronics.com /mag/power_sic_schottky_diodes_2 (933 words)

	SEMICONWELL - RC Networks, Resistor Networks, Power Resistors, Low Pass Filters, SCSI Terminators, Matching Networks, ...
		transistors, diodes, resistors, capacitors, MOSFET s, LDMOS, photodiodes, phototransistors, etc. Since wafers are stocked before the metal mask, the custom IC development phase is shorter and far less expensive compared to conventional full custom ICs.
		Optoelectronic components: photodiodes, photodiodes arrays, phototransistors, position sensing devices, optocouplers, optoisolators, photodarlington, high voltage phototransistors output, Schottky infrared detectors.
		Discrete semiconductors: Schottky diodes, Zener diodes, TVS, small signal bipolar transistors, high voltage bipolar transistors, matched pair bipolar transistors, small signal JFET s and MOSFET s, MCT (MOS controlled tyristors), IGBT.
	www.semiconwell.com (980 words)

	Schottky Barrier Diode
		With forward bias, the resistance of the point-contact diode is higher than that of the junction diode.
		Figure 2-52 is an illustration of the construction of a Schottky barrier diode.
		causes the diode to stop acting as a rectifier and begin acting as a variable resistance.
	www.tpub.com /content/neets/14183/css/14183_137.htm (400 words)

	Hitachi Releases Schottky Barrier Diode for High-Speed Switching
		Based on the premise that a diode with a short recovery time is essential to achieving faster signal processing circuitry, Hitachi developed the HSB0104YP Schottky barrier diode for high-speed switching applications.
		Making use of their short on-off recovery time, Schottky barrier diodes have been used in high-frequency detection and mixer applications, and in low-loss rectification applications that exploit their low-forward-voltage characteristic, but this new product is developed for switching use, in anticipation of the future proliferation of applications requiring high-speed signal processing.
		As conventional junction diodes employ switching characteristics derived from minority carriers, the switching time is limited by the lifetime of these carriers.
	www.hitachi.com /New/cnews/E/1998/980615B.html (392 words)

	The Unusual Diode FAQ
		A backward diode is a diode with an extremely low breakdown voltage, causing it to conductor better in the reverse direction than in the forward direction.
		Backward diodes are similar in structure to tunnel diodes and may show negative resistance, in which case they are usually called tunnel diodes.
		When diodes are switched from forward bias to reverse bias, the diode still conducts for a very short period, since some charge is left in the device.
	margo.student.utwente.nl /el/componen/diodefaq.html (5939 words)

	3.4.1 A Schottky diode with an interfacial layer (Site not responding. Last check: )
		An interfacial layer between the metal and semiconductor of a Schottky diode affects the measured barrier height and built-in potential.
		As an example we consider a thin 3 nm thick oxide layer in a gold-silicon Schottky diode.
		However if one assumes that the barrier is so thin that carriers can easily tunnel through, the diode current analysis can be obtained from the standard diffusion analysis, provided that the altered potential across the semiconductor is taken into account.
	ece-www.colorado.edu /~bart/book/interl.htm (397 words)

	NMRC: III-V: Schottky Diodes
		Varistor and Varactor diodes are supplied with anodes as small as 0.5µm in standard 100µm×100µm square shapes with thickness of 80µm to 100µm.
		NMRC is currently developing "beam lead" or "planar" Schottky barrier diodes where the whisker contact is made redundant with an easier to use assembly bonding process.
		We would be glad to quote to supply your diode requirements and / or to discuss collaborative research with you.
	www.tyndall.ie /projects/iii-v/schottky.html (265 words)

	SiC Schottky Diodes Improve Boost Converter Performance
		A third option, which has become available with the appearance of silicon carbide (SiC) Schottky diodes, is to decrease total power loss and reduce component size by increasing switching frequency.
		Replacing a conventional ultra-fast Si diode at 70 kHz with an SiC Schottky diode at 140 kHz (point 2) reduces the total power loss by 4W at 400W output power (about 1% more efficiency), and reduces the PFC choke volume by 33%.
		Replacing a conventional ultra-fast Si diode at 70 kHz with an SiC Schottky diode at 350 kHz (point 3) keeps the same power loss and heatsink size, but reduces the PFC choke volume by 65%.
	powerelectronics.com /mag/power_sic_schottky_diodes/index.html (2090 words)

	ASI Diodes: Schottky Barrier Mixer and Detector Diodes
		ASI's Schottky Barrier Mixer and Detector Diodes are manufactured by the deposition of a suitable barrier metal on an epitaxial silicon layer to form a junction.
		The Schottky Barrier Mixer Diodes are characterized by noise figure in four different frequency ranges: S, X, KIA- and Ka-Bands.
		The Schottky Barrier Detector Diodes are characterized by Tangen-tial Signal Sensitivity (TSS) in four different frequency ranges: S, X, KJ-t and Ka-Bands.
	www.adsemi.com /diodes/schottky_barrier_mixer_detector.shtml (251 words)

	Diode Manufacturers, Rectifier, Schottky, Zener diodes
		A diode is a two terminal device using a PN junction.
		The current through the diode increases up to a certain voltage, than with increasing voltage the current decreases until a voltage point is reached and the current begins to increase again
		Clamping Diode: A diode used to limit the peak voltage on a line to a pre-determined maximum voltage.
	www.interfacebus.com /diode.html (747 words)

	Cross Charge Schottky Diode (Site not responding. Last check: )
		Charging a second battery can be as simple as connecting a diode between them.
		Regular silicon diodes are only partially effective when used to cross charge another battery...they drop too much voltage.
		The Ample Power CCD is a high current Schottky diode that exhibits very little voltage drop, permitting the second battery to charge fully.
	www.amplepower.com /products/ccd/index.html (278 words)

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