Having Underpass Or Crossunder Patents (Class 438/280)
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Publication number: 20030129802Abstract: A silicon germanium heterojunction bipolar transistor device and method comprises a semiconductor region, and a diffusion region in the semiconductor region, wherein the diffusion region is boron-doped, wherein the semiconductor region comprises a carbon dopant therein to minimize boron diffusion, and wherein a combination of an amount of the dopant, an amount of the boron, and a size of the semiconductor region are such that the diffusion region has a sheet resistance of less than approximately 4 Kohms/cm2. Also, the diffusion region is boron-doped at a concentration of 1×1020/cm3 to 1×1021/cm3. Additionally, the semiconductor region comprises 5-25% germanium and 0-3% carbon. By adding carbon to the semiconductor region, the device achieves an electrostatic discharge robustness, which further causes a tighter distribution of a power-to-failure of the device, and increases a critical thickness and reduces the thermal strain of the semiconductor region.Type: ApplicationFiled: January 9, 2002Publication date: July 10, 2003Inventors: Louis D. Lanzerotti, Brian P. Ronan, Steven H. Voldman
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Publication number: 20030127710Abstract: Coplanar waveguides having a deep trench between a signal line and a ground plane and methods of their fabrication are disclosed. An oxide layer is provided over a silicon substrate and a photoresist is applied and patterned to define areas where the signal line and the ground plane will be formed. A barrier layer is provided over the oxide layer in the defined areas. A metal layer is then deposited over the barrier layer. An etch mask is deposited over the metal layer for the subsequent trench formation. The photoresist and the underlying portion of the oxide and barrier layers are removed and a deep trench is formed in the substrate between the signal line and the ground plane using etching through the mask.Type: ApplicationFiled: July 29, 2002Publication date: July 10, 2003Inventors: Kie Y. Ahn, Leonard Forbes
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Patent number: 6566197Abstract: In a flash memory device, electrical connections between segment transistors and memory cells are accurately achieved by forming the segment transistors before forming the memory cells. When forming the segment transistors, a first impurity is implanted into a substrate to form a first source and a first drain. A second impurity is then implanted into the substrate to form a conductive line to be used as a common bit line for the memory cells, and simultaneously form a second source below the first source and a second drain below the first drain of the segment transistor. As such, the common bit lines of the memory cells and the second sources of the segment transistors are formed to be electrically connected together with more reliability.Type: GrantFiled: August 28, 2001Date of Patent: May 20, 2003Assignee: Hynix Semiconductor Inc.Inventors: Wook-Hyun Kwon, Kee-Yeol Na, Sang-Bum Lee, Yong-Hee Kim, Woong-Lim Choi
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Publication number: 20030080436Abstract: In the semiconductor device having a structure in which a plurality of layers are built-up by layers made of different materials or layers including various formed patterns, it is an object to provide a method which smoothing surface can be achieved without a polishing treatment by CMP method or a smoothing process by depositing a SOG film, a substrate material is not chosen, and the smoothing is simple and easy. In the semiconductor device in which a plurality of different layers are formed, smoothing surface can be achieved without the polishing treatment by the CMP method or the smoothing process by depositing the SOG film to a dielectric film formed on a dielectric film and a wring (electrode) or a semiconductor layer in a manner that an aperture portion is formed in the dielectric film, the wring (electrode) or the semiconductor layer is formed in the aperture portion.Type: ApplicationFiled: October 17, 2002Publication date: May 1, 2003Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventor: Akira Ishikawa
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Patent number: 6541298Abstract: An infrared sensor including a substrate, a plurality of infrared detection pixels arrayed on a substrate with each of the infrared detection pixels including an infrared absorption portion formed over the substrate and configured to absorb infrared radiation, a thermoelectric converter portion formed over the substrate and configured to convert a temperature change in the infrared absorption portion into an electrical signal, and support structures configured to support the thermoelectric converter portion and the infrared absorption portion over the substrate via a separation space, the support structures having conductive interconnect layers configured to deliver the electrical signal from the thermoelectric converter portion to the substrate.Type: GrantFiled: September 28, 2001Date of Patent: April 1, 2003Assignee: Kabushiki Kaisha ToshibaInventors: Yoshinori Iida, Keitaro Shigenaka, Naoya Mashio
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Patent number: 6541330Abstract: Disclosed are a capacitor for semiconductor device capable of increasing storage capacitance and preventing leakage current, and method of manufacturing the same. According to the present invention. A lower electrode is formed on a semiconductor substrate. The lower electrode is surface-treated so as to prevent generation of a natural oxide layer. An amorphous TaON layer is, as a dielectric layer, deposited on the upper part of the lower electrode. Afterwards, the amorphous TaON layer is thermal-treated in a range of maintaining its amorphous state. Next, an upper electrode is formed on the upper part of the TaON layer.Type: GrantFiled: June 30, 2000Date of Patent: April 1, 2003Assignee: Hyundai Electronics Industries Co., Ltd.Inventors: Kee Jeung Lee, Tae Hyeok Lee
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Patent number: 6509217Abstract: Process and device structures for constructing RFID tag and smart card and toy controller integrated circuit transceivers built inexpensively using flat panel display manufacturing machines on large plastic or glass or plastic laminated to glass substrates using thin film technologies at low temperatures and using chemicals and gases which will not attack or damage the substrate. Also disclosed are structures to eliminate the reliability problems caused by differential strain caused by different coefficients of thermal expansion.Type: GrantFiled: October 22, 1999Date of Patent: January 21, 2003Inventor: Damoder Reddy
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Patent number: 6503787Abstract: The present invention provides a semiconductor device, formed on a semiconductor wafer, comprising a tub, first and second active areas, and an interconnect. In one aspect of the present invention, the tub is formed in the substrate of the semiconductor wafer and first and second active areas are in contact with the tub. In one advantageous embodiment, the interconnect is formed in the tub and is in electrical contact with the first and second active areas. The interconnect extends from the first active area to the second active area to electrically connect the first and second active areas.Type: GrantFiled: August 3, 2000Date of Patent: January 7, 2003Assignee: Agere Systems Inc.Inventor: Seungmoo Choi
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Publication number: 20030001277Abstract: After formation of Cu interconnections 46a to 46e each to be embedded in an interconnection groove 40 of a silicon oxide film 39 by CMP and then washing, the surface of each of the silicon oxide film 39 and Cu interconnections 46a to 46e is treated with a reducing plasma (ammonia plasma). Then, without vacuum break, a cap film (silicon nitride film) is formed continuously. This process makes it possible to improve the dielectric breakdown resistance (reliability) of a copper interconnection formed by the damascene method.Type: ApplicationFiled: September 4, 2002Publication date: January 2, 2003Applicant: Hitachi, Ltd.Inventors: Junji Noguchi, Naofumi Ohashi, Kenichi Takeda, Tatsuyuki Saito, Hiruzu Yamaguchi, Nobuo Owada
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Publication number: 20030001280Abstract: After formation of Cu interconnections 46a to 46e each to be embedded in an interconnection groove 40 of a silicon oxide film 39 by CMP and then washing, the surface of each of the silicon oxide film 39 and Cu interconnections 46a to 46e is treated with a reducing plasma (ammonia plasma). Then, without vacuum break, a cap film (silicon nitride film) is formed continuously. This process makes it possible to improve the dielectric breakdown resistance (reliability) of a copper interconnection formed by the damascene method.Type: ApplicationFiled: September 4, 2002Publication date: January 2, 2003Applicant: Hitachi, Ltd.Inventors: Junji Noguchi, Naofumi Ohashi, Kenichi Takeda, Tatsuyuki Saito, Hizuru Yamaguchi, Nobuo Owada
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Publication number: 20020185742Abstract: An object of the present invention is to provide a semiconductor device and a method of manufacturing the semiconductor device which can improve the flatness after the chemical mechanical polishing by inserting necessary and minimum dummy patterns and has high throughput.Type: ApplicationFiled: July 11, 2002Publication date: December 12, 2002Inventors: Atsushi Ootake, Kinya Kobayashi
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Patent number: 6440754Abstract: A ferroelectric thin film capacitor has smooth electrodes permitting comparatively stronger polarization, less fatigue, and less imprint, as the ferroelectric capacitor ages. The smooth electrode surfaces are produced by carefully controlled drying, soft baking, and annealing conditions.Type: GrantFiled: April 26, 2001Date of Patent: August 27, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shinichiro Hayashi, Tatsuo Otsuki
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Patent number: 6436765Abstract: A method of fabricating a trenched flash memory cell is provided. A plurality of shallow trench isolation structures are formed to enclose at least an active area in a silicon substrate. A doped region is formed in the silicon substrate, followed by the deposition of an isolation layer on the silicon substrate. A first photo and etching process (PEP) is performed to form two trenches within the active area. A tunnel oxide layer, a floating gate, and ONO dielectric layer are formed in the trenches, respectively. A doped polysilicon layer is then formed on the silicon substrate to fill the trenches, followed by the removal of a portion of the doped polysilicon layer to form two controlling gates in the active area. Next, a self-alignment common source is formed between the two controlling gates and a plurality of spacers are formed on either side of each controlling gate. Finally, a silicide layer is formed on the surfaces of the controlling gates and the common source.Type: GrantFiled: February 9, 2001Date of Patent: August 20, 2002Assignee: United Microelectronics Corp.Inventors: Ji-Wei Liou, Chih-Jen Huang, Pao-Chuan Lin
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Publication number: 20020096691Abstract: A lateral, high-voltage, FET having a low on-resistance and a buried conduction layer comprises a P-type buried layer region within an N-well formed in a P-type substrate. The P-type buried layer region is connected to a drain electrode by a first P-type drain diffusion region that is disposed in the N-well region. The P-type buried layer region is also connected to a second P-type drain diffusion region that extends down from the surface at one end of the PMOS gate region. A P-type source diffusion region, which connects to the source electrode, defines the other end of the gate region.Type: ApplicationFiled: January 24, 2001Publication date: July 25, 2002Inventor: Donald Ray Disney
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Patent number: 6403424Abstract: A method for forming a self-aligned mask read only memory by dual damascene trenches is disclosed. In the method, a thickness difference is formed between the gate area and periphery to be formed with a dual damascene trench so as to be formed with a condition of self-alignment of read only memory code. Thus, the manufacturing range in the lithography is enlarged, and an ion implantation process with self-aligned ability complete. Therefore, self-aligned read only memory codes and metal word lines are formed. The defect of disalignment in the read only memory code is resolved and the difficulty in the manufacturing process is reduced.Type: GrantFiled: October 2, 2001Date of Patent: June 11, 2002Assignee: Macronix International Co., Ltd.Inventors: Chung-Yeh Lee, Pei-Ren Jeng, Henry Chung
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Patent number: 6387788Abstract: The present invention provides a method for fabricating an improved gate electrode of a MOSFET device. And the method for fabricating a MOSFET device having a polycide gate to which a titanium silicide is applied comprises the steps of sequentially forming a polysilicon layer on a gate insulating layer and a titanium layer in this order, forming a capping layer on the titanium layer and forming a titanium silicide layer by performing a rapid thermal process in nitrogen atmosphere.Type: GrantFiled: June 29, 1999Date of Patent: May 14, 2002Assignee: Hyundai Electronics Industries Co., Ltd.Inventors: Se Aug Jang, In Seok Yeo
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Publication number: 20020055203Abstract: The present invention provides a semiconductor device including a silicon substrate; a heat insulating layer including a silicon oxide film; and a heat detecting portion, in which the heat insulating layer includes a closed cavity and/or a hole, an interior of the hole has a greater diameter than an opening of the hole, and at least a portion of the closed cavity or the hole is formed within the silicon oxide film. The invention also provides a method of manufacturing this semiconductor device.Type: ApplicationFiled: June 29, 2001Publication date: May 9, 2002Inventors: Hiroyoshi Komobuchi, Yoshikazu Chatani, Takahiro Yamada, Rieko Nishio, Hiroaki Uozumi, Masayuki Masuyama, Takumi Yamaguchi
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Publication number: 20020045009Abstract: A method of chemically growing a thin film in a gas phase using a rotary gaseous phase thin film growth apparatus which feeds a material gas by flowing down the gas from above to a surface of a rotating silicon semiconductor substrate to grow a thin film on a surface of said silicon semiconductor substrate in a method of chemically growing a thin film that a thin film-growing reaction is done wherein: monosilane gas is used as an effective component of the material gas to grow the thin film under a reduced pressure of from 2.7×102 to 6.7×103 Pa with the number of rotations of said silicon semiconductor substrate being from 500 to 2000 min−1 and at a reaction temperature of from 600° C. to 800° C.Type: ApplicationFiled: August 6, 2001Publication date: April 18, 2002Applicant: TOSHIBA CERAMICS CO., LTD.Inventors: Shuji Tobashi, Tadashi Ohashi, Shinichi Mitani, Hideki Arai, Hidenori Takahashi
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Publication number: 20020031889Abstract: The present invention provides a method for manufacturing a semiconductor device having a junction area formed by doping with a first conductive and a second conductive dopant. According to the method of the present invention, a surface of the semiconductor device is irradiated by electron beams or charged particles having energy of 100 to 500 keV. After the irradiation by electron beams or charged particles, annealing in a hydrogen atmosphere is performed for the irradiated semiconductor device.Type: ApplicationFiled: September 28, 2001Publication date: March 14, 2002Applicant: S.H.I. Examination & Inspection LtdInventors: Yoshiaki Nishihara, Jungyol Jo
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Publication number: 20020025635Abstract: In a flash memory device, electrical connections between segment transistors and memory cells are accurately achieved by forming the segment transistors before forming the memory cells. When forming the segment transistors, a first impurity is implanted into a substrate to form a first source and a first drain. A second impurity is then implanted into the substrate to form a conductive line to be used as a common bit line for the memory cells, and simultaneously form a second source below the first source and a second drain below the first drain of the segment transistor. As such, the common bit lines of the memory cells and the second sources of the segment transistors are formed to be electrically connected together with more reliability.Type: ApplicationFiled: August 28, 2001Publication date: February 28, 2002Inventors: Wook-Hyun Kwon, Kee-Yeol Na, Sang-Bum Lee, Yong-Hee Kim, Woong-Lim Choi
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Patent number: 6340628Abstract: A chemical vapor deposition (CVD) process uses a precursor gas, such as with a siloxane or alkylsilane, and a carbon-dioxide-containing gas, such as CO2 with O2 or CO2 with CxH(2x+1)OH where 1≦x≦5, to deposit a dielectric layer with no photoresist “footing”, a low dielectric constant, and high degrees of adhesion and hardness. Because nitrogen is not used in the deposition process (the carbon-dioxide-containing gas replaces nitrogen-containing gases in conventional processes), amines do not build into the deposited layer, thereby preventing photoresist “footing”.Type: GrantFiled: December 12, 2000Date of Patent: January 22, 2002Assignee: Novellus Systems, Inc.Inventors: Patrick A. Van Cleemput, Ravi Kumar Laxman, Jen Shu, Michelle T. Schulberg, Bunsen Nie
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Publication number: 20010029078Abstract: An object of the present invention is to provide a semiconductor apparatus and a method of manufacturing the same, in which dispersion of a threshold voltage Vth of a transistor at every transistor is reduced to remove generation of fixed charges in a gate insulation film and a surface level to stabilize the operation of the semiconductor apparatus. A semiconductor apparatus having a MIS transistor (1), wherein a gate electrode (4) of said MIS transistor (1), which mainly contributes to the operation of a circuit, is continuously formed to a position above a bypass film (8) made of an insulation film through which a leak current is able to easily flow as compared with a gate insulation film (7) of said MIS transistor (1) under the same voltage.Type: ApplicationFiled: June 11, 2001Publication date: October 11, 2001Inventor: Hideshi Abe
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Patent number: 6291863Abstract: Disclosed is a thin film transistor used to manufacture a highly integrated SRAM or LCD and its manufacturing method, and more particularly, to a thin film transistor having a multi-layer stacked channel in order to increase the current flow during the thin film transistor's ON state by securing a enough channel width despite of the limited area; A thin film transistor on which a channel had been deposited in accordance with the present invention can be manufactured in a small area; accordingly, a highly integrated SRAM can be manufactured by decreasing the area of the unit cell of SRAM. Also, the resolution can be enhanced by decreasing the area occupied by the thin film transistor in the panel during the manufacturing process of the LCD.Type: GrantFiled: September 12, 1994Date of Patent: September 18, 2001Assignee: Hyundai Electronics Industries Co., Ltd.Inventor: Ha Hyoung Chan
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Patent number: 6261908Abstract: A method of fabricating a buried local interconnect in a substrate and an integrated circuit incorporating the same are provided. The method includes the steps forming a trench in the substrate and forming a first insulating layer in the trench. A conductor layer is formed on the first insulating layer. A portion of the conductor layer is removed to define a local interconnect layer and a second insulating layer is formed in the trench covering the local interconnect layer. The method provides for a local interconnect layer buried beneath a dielectric layer of an integrated circuit, such as a shallow trench isolation layer. Areas of a substrate above the silicon-silicon dioxide interface formerly reserved for local interconnect layers in conventional processing may now be used for additional conductor lines.Type: GrantFiled: July 27, 1998Date of Patent: July 17, 2001Assignee: Advanced Micro Devices, Inc.Inventors: Frederick N. Hause, Mark I. Gardner, Charles E. May
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Patent number: 6204107Abstract: A method for forming a multi-layered liner on the sidewalls of a node contact opening includes the steps of providing a substrate having a dielectric layer thereon. The dielectric layer further includes a node contact opening that exposes a portion of the substrate. A first liner layer is then formed on the sidewalls of the node contact opening. Next, a second liner layer is formed over the first liner layer such that the first liner layer and the second liner layer together form a dual-layered liner. The first liner layer in contact with the dielectric layer has good insulation capacity while the second liner layer has good etch-resisting property.Type: GrantFiled: December 8, 1998Date of Patent: March 20, 2001Assignee: United Microelectronics Corp.Inventors: Kuo-Chi Lin, Kuen-Yow Lin, Chien-Hua Tsai, Kun-Chi Lin
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Patent number: 6153467Abstract: A method of fabricating buried bit line flash EEROM with shallow trench floating gate for suppressing the short channel effect is disclosed. The method comprises following steps. Firstly, a pad oxide layer and a conductive impurity (such as phosphorus) doped polysilicon layer is successively formed on the silicon substrate. Then, an oxidation process is performed to oxidize the polysilicon layer and to drive in the conductive impurities. After coating a patterned mask on the resultant surface to define a plurality of buried bit line regions, a dry etch is used to etch away the unmask regions till the silicon substrate is slightly recessed to form shallow trenches. Subsequently, the photoresist is stripped, and a gate dielectric layer, such as gate nitride or oxynitride layer is formed on the resultant surface.Type: GrantFiled: March 18, 1999Date of Patent: November 28, 2000Assignee: Texas Instruments - Acer IncorporatedInventor: Shye-Lin Wu
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Patent number: 6104069Abstract: A process for forming a semiconductor device having an elevated active region is disclosed. The process includes forming a plurality of gate electrodes on the semiconductor substrate and disposing a thick oxide layer over the gate electrodes. A trench is formed in a thick oxide layer and is filled with a polysilicon material. The polysilicon material is subsequently doped in order to form an elevated active region above an active region of the substrate.Type: GrantFiled: November 4, 1998Date of Patent: August 15, 2000Assignee: Advanced Micro Devices, Inc.Inventors: Michael Duane, Daniel Kadosh, Mark I. Gardner
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Patent number: 6037225Abstract: The present invention includes forming word lines on a substrate. Next, nitride spacers are formed on the side walls of the word lines. In the cell area, a photoresist is patterned on the substrate to cover a coding region. Then, an ion implantation with n type conductive dopant is carried out to form buried bit lines in the cell area and in the peripheral area adjacent to the word lines. Afterwards, the photoresist is stripped. A high temperature thermal oxidation is then performed to activate the dopant and to form thick oxide structures to isolate the adjacent buried bit lines.Type: GrantFiled: April 14, 1998Date of Patent: March 14, 2000Assignee: Texas Instruments Acer IncorporatedInventor: Shye-Lin Wu
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Patent number: 5952697Abstract: A ROM memory array comprises a doped silicon substrate having a surface with a first array of parallel bitlines formed in the substrate at the surface with an array of channel regions between the bitlines. A dielectric layer is formed on the substrate with a wordline array composed of transversely disposed parallel conductors formed on the dielectric layer, with the bitlines and the channel regions and the wordline array forming an array of field effect transistors. A gate oxide layer is formed over the wordlines. A thin film polysilicon storage plane is formed over the gate oxide layer with a second array of alternating parallel bitlines and channel regions formed in the thin film polysilicon storage plane. The second array of bitlines and channel regions is orthogonally disposed relative to the wordline array and the second array of bitlines is formed in a storage plane over an interpolysilicon oxide dielectric isolation layer.Type: GrantFiled: November 5, 1997Date of Patent: September 14, 1999Assignee: Chartered Semiconductor Manufacturing Ltd.Inventor: Bob Hsiao-Lun Lee
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Patent number: 5747867Abstract: Insulating trenches (2) in the silicon layer of an SOI substrate that extend onto the insulating layer of the SOI substrate define silicon islands (3). At least one of the silicon islands (3) is an interconnect segment (3a) by a diffusion zone that is arranged at the walls of the surrounding trench (2) and that is formed by drive-out from an occupation layer introduced into the trench. The interconnect segment (3a) is suitable as an underpass for crossing interconnects (6a,6b) or as an additional metallization level.Type: GrantFiled: December 15, 1995Date of Patent: May 5, 1998Assignee: Siemens AktiengesellschaftInventor: Klaus-Guenter Oppermann