Pn Junction Isolated Integrated Circuit With Isolation Walls Having Minimum Dopant Concentration At Intermediate Depth In Epitaxial Layer (e.g., Diffused From Both Surfaces Of Epitaxial Layer) Patents (Class 257/929)
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Patent number: 8089066Abstract: To provide a light emitting device high in reliability with a pixel portion having high definition with a large screen. According to a light emitting device of the present invention, on an insulator (24) provided between pixel electrodes, an auxiliary electrode (21) made of a metal film is formed, whereby a conductive layer (20) made of a transparent conductive film in contact with the auxiliary electrode can be made low in resistance and thin. Also, the auxiliary electrode (21) is used to achieve connection with an electrode on a lower layer, whereby the electrode can be led out with the transparent conductive film formed on an EL layer. Further, a protective film (32) made of a film containing hydrogen and a silicon nitride film which are laminated is formed, whereby high reliability can be achieved.Type: GrantFiled: March 16, 2010Date of Patent: January 3, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Masaaki Hiroki, Masakazu Murakami, Hideaki Kuwabara
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Patent number: 8039359Abstract: In one embodiment, the ESD device uses highly doped P and N regions deep within the ESD device to form a zener diode that has a controlled breakdown voltage.Type: GrantFiled: February 27, 2009Date of Patent: October 18, 2011Assignee: Semiconductor Components Industries, LLCInventors: Thomas Keena, Ki Chang, Francine Y. Robb, Mingjiao Liu, Ali Salih, John Michael Parsey, Jr., George Chang
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Patent number: 7538395Abstract: In one embodiment, the ESD device uses highly doped P and N regions deep within the ESD device to form a zener diode that has a controlled breakdown voltage.Type: GrantFiled: September 21, 2007Date of Patent: May 26, 2009Assignee: Semiconductor Components Industries, L.L.C.Inventors: Thomas Keena, Ki Chang, Francine Y. Robb, Mingjiao Liu, Ali Salih, John Michael Parsey, Jr., George Chang
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Patent number: 7474011Abstract: A process and system for estimating the occurrence of single event latch-up in an integrated circuit. The process involves determining the resistance between each junction and the closest appropriate tap in a regular shaped well. Each junction occurring in an irregular-shaped well is also identified. Finally, the method may make suggestions for lowering the probability that single event latch-up may occur in the integrated circuit.Type: GrantFiled: September 25, 2006Date of Patent: January 6, 2009Assignee: Integrated Device Technologies, inc.Inventors: Chuen-Der Lien, Ta-Ke Tien, Pao-Lu Louis Huang
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Patent number: 6867438Abstract: There is a demand of a solid-state imaging device capable of being driven at a high speed and in which the shading of sensitivity and illuminance defect can be prevented from being caused. A solid-state imaging device (20) comprises a light-receiving sensor section disposed on the surface layer portion of a substrate (21) for performing a photoelectric conversion, a charge transfer section for transferring a signal charge read out from the light-receiving sensor section, a transfer electrode (27) (28) made of polysilicon formed on a substrate (21) at a position approximately above the charge transfer section through an insulating film (26), and an interconnection made of polysilicon and interconnected to the transfer electrode (27) (28). At least one of the polysilicon transfer electrode (27)(28) and the interconnection is formed on a polysilicon layer (27a) (28a) by selectively depositing a high-melting point metal having a resistance value lower than that of polysilicon.Type: GrantFiled: March 16, 1999Date of Patent: March 15, 2005Assignee: Sony CorporationInventors: Yasushi Maruyama, Hideshi Abe
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Patent number: 6838715Abstract: An exemplary CMOS image sensor comprises a plurality of pixels arranged in an array. The plurality of pixels includes a first pixel proximate an optical center of the array, and a second pixel proximate a peripheral edge of the array. The CMOS image sensor further comprises a first metal interconnect segment associated with the first pixel situated in a first metal layer, and a second metal interconnect segment associated with the second pixel situated in the first metal layer. The second metal interconnect segment is shifted closer to the optical center of the array than the first metal interconnect segment so that the second metal interconnect segment approximately aligns with a principle ray angle incident the second pixel, thereby reducing pixel light shadowing.Type: GrantFiled: April 29, 2003Date of Patent: January 4, 2005Assignee: ESS Technology, Inc.Inventors: Selim Bencuya, Richard Mann, Erik Stauber
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Patent number: 6809003Abstract: A method of forming a semiconductor device on a substrate. The method includes forming a first epitaxial layer on the substrate. Next, a selected impurity is introduced to a surface of the first epitaxial layer. A second epitaxial layer is then formed on the surface of the first epitaxial layer and over the selected impurity. Finally, the selected impurity is driven through the first epitaxial layer and the second epitaxial layer to form the desired doped regions.Type: GrantFiled: April 2, 2003Date of Patent: October 26, 2004Assignee: Polarfab LLCInventor: Daniel J. Fertig
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Patent number: 6787829Abstract: A liquid crystal display panel of the invention is such that, in a pixel region defined by a region of the array substrate surrounded by a pair of image signal lines and a pair of scanning signal lines, of a line-shaped pixel electrode and a common electrode, the electrode that is disposed adjacent to and parallel to a signal line is made of an opaque conductor and at least one of the other electrodes is made of a transparent conductor. Adverse effects of the electric field formed between a signal line and an adjacent electrode thereto are suppressed and a sufficient aperture ratio is ensured by using a transparent conductor for the electrode contributing good display.Type: GrantFiled: December 5, 2001Date of Patent: September 7, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Tetsuo Fukami, Katsuhiko Kumagawa, Hiroyuki Yamakita, Masanori Kimura, Michiko Okafuji, Satoshi Asada
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Patent number: 6781162Abstract: To provide a light emitting device high in reliability with a pixel portion having high definition with a large screen. According to a light emitting device of the present invention, on an insulator (24) provided between pixel electrodes, an auxiliary electrode (21) made of a metal film is formed, whereby a conductive layer (20) made of a transparent conductive film in contact with the auxiliary electrode can be made low in resistance and thin. Also, the auxiliary electrode (21) is used to achieve connection with an electrode on a lower layer, whereby the electrode can be led out with the transparent conductive film formed on an EL layer. Further, a protective film (32) made of a film containing hydrogen and a silicon nitride film which are laminated is formed, whereby high reliability can be achieved.Type: GrantFiled: January 23, 2003Date of Patent: August 24, 2004Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Masaaki Hiroki, Masakazu Murakami, Hideaki Kuwabara
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Patent number: 6756617Abstract: It is an object of the present invention to provide wiring pattern conditions for obtaining a high-quality analog image output signal in a contact image sensor which operates at a high speed (5 MHz or more). In order to achieve this object, a CIS substrate has the following arrangement. Signal lines &phgr;M, &phgr;RS, and &phgr;TR which transmit signals to CCD chips (2—2) are digital signal lines Dn, and signal lines from the CCD chips (2—2) to the inputs of emitter followers and output lines from the emitter followers are analog signal lines An. In FIG. 1, letting A1 be an analog signal line from the CCD, and D1 be a digital signal line, the analog signal line A1 and digital signal line D1 are formed on separate layers.Type: GrantFiled: October 2, 2002Date of Patent: June 29, 2004Assignee: Canon Kabushiki KaishaInventor: Kazuhisa Koizumi
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Publication number: 20040012100Abstract: In a photosensitive imaging chip, such as employing CCD or CMOS technology, each photosite is electrically isolated from other structures on the chip by a trench. The trench extends through an epitaxial layer of the chip and intersects a heavily-doped substrate layer of the chip by at least 1 &mgr;m. The trench can be formed by plasma etching, and filled with polysilicon.Type: ApplicationFiled: July 18, 2002Publication date: January 22, 2004Applicant: Xerox CorporationInventor: Paul A. Hosier
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Patent number: 6611007Abstract: A novel quantum well intermixing method for regionally modifying the bandgap properties of InGaAsP quantum well structures is disclosed. The method induces bandgap wavelength blue shifting and deep states for reducing carrier lifetime within InGaAsP quantum well structures. The novel quantum well intermixing technique is applied to the modulator section of an integrated DFB laser/electro-absorption modulator, wherein the modulator exhibits fast switching times with efficient optical coupling between the DFB laser and modulator region.Type: GrantFiled: May 9, 2002Date of Patent: August 26, 2003Assignee: Fiber Optic Systems Technology, Inc.Inventors: David A. Thompson, Brad J. Robinson, Gregory J. Letal, Alex S. W. Lee
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Patent number: 6608352Abstract: In a system for determining thermal resistance of a field effect transistor, a p-n junction is formed with one of drain and source regions of the transistor for determining a current versus temperature characteristic of the p-n junction. A respective temperature of the transistor is determined for each of a plurality of power dissipation levels through the transistor from the current versus temperature characteristic of the p-n junction. The thermal resistance is a rate of change of the temperature with respect to a rate of change of the power dissipation level for the field effect transistor.Type: GrantFiled: April 25, 2002Date of Patent: August 19, 2003Assignee: Advanced Micro Devices, Inc.Inventors: Wei Long, Michael Lee
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Patent number: 5719425Abstract: A multiple implant lightly doped drain ("MILDD") field effect transistor is disclosed. The transistor includes a channel, a gate, a dielectric structure that separates the gate from the channel, a source region and a drain region. The drain region has a first drain subregion, a second drain subregion and a third drain subregion. Each drain subregion has a dopant concentration that differs from that of the other two drain subregions. A method of forming the same is also disclosed.Type: GrantFiled: January 31, 1996Date of Patent: February 17, 1998Assignee: Micron Technology, Inc.Inventors: Salman Akram, Akram Ditali
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Patent number: 5701022Abstract: A semiconductor memory configuration in a semiconductor substrate includes bit lines, word lines, and memory cells each including one memory capacitor and one MOS selection transistor having two conducting regions and a gate electrode. Each memory capacitor is connected to one of the conducting regions of the transistor. The other of the conducting regions of the transistor is connected to one of the bit lines, and the gate electrode of the transistor is connected to one of the word lines. An insulating field oxide or buried insulating oxide with substantially vertical sidewalls is provided. A trench lies adjacent to the insulating field oxide or buried insulating oxide and adjacent to one of the conducting regions. The capacitors are each disposed in one trench for each memory cell. A first insulating layer covers the inner trench wall surface. A first electrode of the capacitor is disposed perpendicular to the substrate surface on the first insulating layer completely inside the trench.Type: GrantFiled: February 4, 1994Date of Patent: December 23, 1997Assignee: Siemens AktiengesellschaftInventors: Walter-Ulrich Kellner, Karl-Heinz Kusters, Wolfgang Muller, Franz-Xaver Stelz
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Patent number: 5623159Abstract: An improved isolation structure for a semiconductor device includes a p-type semiconductor substrate (12) with a p-type well (28) disposed in the substrate (12). A continuous plurality of n-type regions (14, 16, 26) is disposed around the p-type well (28), and the continuous plurality of n-type regions (14, 16, 26) fully isolates the p-type well (28) from the substrate (12) except that the continuous plurality of regions (14, 16, 26) comprises one or more p-type gaps (18) that electrically connect the p-type well (28) to the p-type substrate (12). The use of the gap (18) improves cross-talk suppression in mixed-mode integrated circuits at higher frequencies, for example greater than 50 MHz.Type: GrantFiled: April 4, 1996Date of Patent: April 22, 1997Assignee: Motorola, Inc.Inventors: David J. Monk, Kuntal Joardar
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Patent number: 5478761Abstract: A complementary field effect element develops an intensified latch-up preventive property even if the distance between the emitters of parasitic transistors is short, and a method of producing the same are disclosed. The complementary field effect element includes a high concentration impurity layer (16) formed by ion implantation in the boundary region between a P-well (2) and an N-well (3) which are formed adjacent each other on the main surface of a semiconductor substrate (1). Therefore, carriers passing through the boundary region between the P-well (2) and the N-well (3) are decreased, so that even if the distance between the emitters (4, 5) of parasitic transistors is short, there is obtained an intensified latch-up preventive property.Type: GrantFiled: July 6, 1993Date of Patent: December 26, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Shigeki Komori, Katsuhiro Tsukamoto
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Patent number: 5408125Abstract: A method of manufacturing semiconductor devices with increased operating voltages is described. A dopant of a second conductivity type is implanted into a region of a first epitaxial layer of the first conductivity type to form a buried layer. A substantially smaller dosage of a faster-diffusing dopant of the second conductivity type is then implanted into the buried layer region. The second epitaxial layer of the first conductivity type is formed over the first epitaxial layer. A region of the second epitaxial layer overlying the doped region of the first epitaxial layer is implanted with a dopant of the second conductivity type and diffused to form a doped well. The faster-diffusing dopant diffuses upward to make good electrical contact with the doped well diffusing downward from the surface. The lateral diffusion of the faster-diffusing dopant can be contained, so that lateral spacing design rules do not have to be increased.Type: GrantFiled: January 4, 1994Date of Patent: April 18, 1995Assignee: Texas Instruments IncorporatedInventors: John P. Erdeljac, Louis N. Hutter