Having Cylindrical, Crown, Or Fin-type Shape (epo) Patents (Class 257/E21.014)
  • Patent number: 7394128
    Abstract: A semiconductor memory (26) having a plurality of memory cells (25), the semiconductor memory (26) having a substrate (1), at least one wordline (2) and first (3) and second lines (4). Each memory cell (25) of the plurality of memory cells (25) includes a fin (15) of semiconductor material, the fin (15) having a top surface (5), first (6) and second (7) opposing sidewalls and first (8) and second (9) opposing ends. The fin (15) extends along a first direction (X). Each memory cell (25) also includes a charge-trapping layer (11) disposed on the first (6) and second (7) sidewalls of said fin (15), a patterned first insulating layer (10) disposed on the top surface (5) of the fin (15), wherein the first insulating layer (10) abuts the top surface (5) of the fin (15) and the charge-trapping layer (11). Each memory cell (25) also includes a first doping region (12) coupled to the first end (8) of said fin (15) and a second doping region (13) coupled to the second end (9) of the fin (15).
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: July 1, 2008
    Assignee: Infineon Technologies AG
    Inventor: Lars Bach
  • Patent number: 7368354
    Abstract: A planar substrate device integrated with fin field effect transistors (FinFETs) and a method of manufacture comprises a silicon-on-insulator (SOI) wafer comprising a substrate; a buried insulator layer over the substrate; and a semiconductor layer over the buried insulator layer. The structure further comprises a FinFET over the buried insulator layer and a field effect transistor (FET) integrated in the substrate, wherein the FET gate is planar to the FinFET gate. The structure further comprises retrograde well regions configured in the substrate. In one embodiment, the structure further comprises a shallow trench isolation region configured in the substrate.
    Type: Grant
    Filed: August 9, 2005
    Date of Patent: May 6, 2008
    Assignee: International Business Machines Corporation
    Inventors: Brent A. Anderson, Edward J. Nowak, Jed H. Rankin
  • Patent number: 7358122
    Abstract: Structure and methods of fabrication are disclosed for an enhanced FET devices in which dopant impurities are prevented from diffusing through the gate insulator. The structure comprises a Si:C, or SiGe:C, layer which is sandwiched between the gate insulator and a layer which is doped with impurities in order to provide a preselected workfunction. It is further disclosed how this, and further improvements for FET devices, such as raised source/drain and multifaceted gate on insulator, MODFET on insulator are integrated with strained Si based layer on insulator technology.
    Type: Grant
    Filed: February 25, 2005
    Date of Patent: April 15, 2008
    Assignee: International Business Machines Corporation
    Inventor: Jack Oon Chu
  • Patent number: 7341916
    Abstract: A field effect transistor (FET) device structure and method for forming FETs for scaled semiconductor devices. Specifically, FinFET devices are fabricated from silicon-on-insulator (SOI) wafers in a highly uniform and reproducible manner. The method facilitates formation of FinFET devices with improved and reproducible fin height control while providing isolation between source and drain regions of the FinFET device.
    Type: Grant
    Filed: November 10, 2005
    Date of Patent: March 11, 2008
    Assignee: Atmel Corporation
    Inventor: Bohumil Lojek
  • Patent number: 7326608
    Abstract: In a fin field effect transistor (FET), an active pattern protrudes in a vertical direction from a substrate and extends across the substrate in a first horizontal direction. A first silicon nitride pattern is formed on the active pattern, and a first oxide pattern and a second silicon nitride pattern are sequentially formed on the substrate and on a sidewall of a lower portion of the active pattern. A device isolation layer is formed on the second silicon nitride pattern, and a top surface of the device isolation layer is coplanar with top surfaces of the oxide pattern and the second silicon nitride pattern. A buffer pattern having an etching selectivity with respect to the second silicon nitride pattern is formed between the first oxide pattern and the second silicon nitride pattern.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: February 5, 2008
    Assignee: Samsung Electronic Co., Ltd.
    Inventors: Deok-Hyung Lee, Yu-Gyun Shin, Jong-Wook Lee, Min-Gu Kang
  • Patent number: 7323389
    Abstract: A semiconductor device (10) such as a FinFET transistor of small dimensions is formed in a process that permits substantially uniform ion implanting (32) of a source (14) electrode and a drain (16) electrode adjacent to an intervening gate (18) and channel (23) connected via source/drain extensions (22, 24) which form a fin. At small dimensions, ion implanting may cause irreparable crystal damage to any thin areas of silicon such as the fin area. To permit a high concentration/low resistance source/drain extension, a sacrificial doping layer (28, 30) is formed on the sides of the fin area. Dopants from the sacrificial doping layer are diffused into the source electrode and the drain electrode using heat. Subsequently a substantial portion, or all, of the sacrificial doping layer is removed from the fin.
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: January 29, 2008
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Sinan Goktepeli, Voon-Yew Thean
  • Patent number: 7288805
    Abstract: A double-gated fin-type field effect transistor (FinFET) structure has electrically isolated gates. In a method for manufacturing the FinFET structure, a fin, having a gate dielectric on each sidewall corresponding to the central channel region, is formed over a buried oxide (BOX) layer on a substrate. Independent first and second gate conductors on either sidewall of the fin are formed and include symmetric multiple layers of conductive material. An insulator is formed above the fin by either oxidizing conductive material deposited on the fin or by removing conductive material deposited on the fin and filling in the resulting space with an insulating material. An insulating layer is deposited over the gate conductors and the insulator. A first gate contact opening is etched in the insulating layer above the first gate. A second gate contact opening is etched in the BOX layer below the second gate.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: October 30, 2007
    Assignee: International Business Machines Corporation
    Inventors: Brent A. Anderson, Edward J. Nowak
  • Publication number: 20070134872
    Abstract: The invention comprises methods of forming pluralities of capacitors. In one implementation, metal is formed over individual capacitor storage node locations on a substrate. A patterned masking layer is formed over the metal. The patterned masking layer comprises openings therethrough to an outer surface of the metal. Individual of the openings are received over individual of the capacitor storage node locations. A pit is formed in the metal outer surface within individual of the openings. After forming the pits, the metal is anodically oxidized through the openings effective to form a single metal oxide-lined channel in individual of the openings over the individual capacitor storage nodes. Individual capacitor electrodes are formed within the channels in electrical connection with the individual capacitor storage node locations. At least some of the metal oxide is removed from the substrate, and the individual capacitor electrodes are incorporated into a plurality of capacitors.
    Type: Application
    Filed: February 9, 2007
    Publication date: June 14, 2007
    Inventors: Gurtej Sandhu, H. Manning, Stephen Kramer
  • Patent number: 7230287
    Abstract: Disclosed herein is a structure with two different type tri-gate MOSFETs formed on the same substrate. Each MOSFET comprises a fin with optimal mobility for the particular type of MOSFET. Due to the processes used to form fins with different crystalline orientations on the same substrate, one of the MOSFETs has a fin with a lower mobility top surface. To inhibit inversion of the top surface, this MOSFET has a gate dielectric layer with a thicker region on the top surface than it does on the opposing sidewall surfaces. Additionally, several techniques for forming the thicker region of the gate dielectric layer are also disclosed.
    Type: Grant
    Filed: August 10, 2005
    Date of Patent: June 12, 2007
    Assignee: International Business Machines Corporation
    Inventors: Brent A. Anderson, Edward J. Nowak
  • Patent number: 7220628
    Abstract: A method for manufacturing a semiconductor device includes a step of forming a layer where a gate electrode aperture is to be formed including at least one ultraviolet resist layer on the surface where a gate electrode is to be formed, and forming a gate electrode aperture in the layer where a gate electrode aperture is to be formed; a step of forming a layer where an over-gate is to be formed in which an over-gate part of a gate electrode is to be formed, on the layer where a gate electrode aperture is to be formed; a step of reducing the width of the gate electrode aperture; and a step of forming the gate electrode in the gate electrode aperture. The method makes it possible to efficiently produce a fine gate electrode by thickening the gate electrode aperture and reducing the width of the gate electrode aperture.
    Type: Grant
    Filed: December 28, 2004
    Date of Patent: May 22, 2007
    Assignee: Fujitsu Limited
    Inventors: Junichi Kon, Koji Nozaki, Kozo Makiyama, Toshihiro Ohki
  • Publication number: 20070052115
    Abstract: The invention includes semiconductor constructions, and also includes methods of forming pluralities of capacitor devices. An exemplary method of the invention includes forming conductive storage node material within openings in an insulative material to form conductive containers. A retaining structure lattice is formed in physical contact with at least some of the containers, and subsequently the insulative material is removed to expose outer surfaces of the containers. The retaining structure can alleviate toppling or other loss of structural integrity of the container structures. The electrically conductive containers correspond to first capacitor electrodes. After the outer sidewalls of the containers are exposed, dielectric material is formed within the containers and along the exposed outer sidewalls. Subsequently, a second capacitor electrode is formed over the dielectric material. The first and second capacitor electrodes, together with the dielectric material, form a plurality of capacitor devices.
    Type: Application
    Filed: November 9, 2006
    Publication date: March 8, 2007
    Inventors: H. Manning, Thomas Graettinger
  • Publication number: 20070045693
    Abstract: The invention includes semiconductor constructions, and also includes methods of forming pluralities of capacitor devices. An exemplary method of the invention includes forming conductive storage node material within openings in an insulative material to form conductive containers. A retaining structure lattice is formed in physical contact with at least some of the containers, and subsequently the insulative material is removed to expose outer surfaces of the containers. The retaining structure can alleviate toppling or other loss of structural integrity of the container structures. The electrically conductive containers correspond to first capacitor electrodes. After the outer sidewalls of the containers are exposed, dielectric material is formed within the containers and along the exposed outer sidewalls. Subsequently, a second capacitor electrode is formed over the dielectric material. The first and second capacitor electrodes, together with the dielectric material, form a plurality of capacitor devices.
    Type: Application
    Filed: August 30, 2005
    Publication date: March 1, 2007
    Inventors: H. Manning, Thomas Graettinger
  • Publication number: 20070040287
    Abstract: A method for forming a capacitor of a semiconductor device ensures charging capacity and improves leakage current characteristic. In the capacitor forming method, a semiconductor substrate formed with a storage node contact is prepared first. Next, a storage electrode is formed such that the storage electrode is connected to the storage node contact. Also, a dielectric film comprised of a composite dielectric of a SrTiO3 film and an anti-crystallization film is formed on the storage electrode. Finally, a plate electrode is formed on the dielectric film.
    Type: Application
    Filed: August 15, 2006
    Publication date: February 22, 2007
    Inventor: Jong Bum Park
  • Patent number: 7094660
    Abstract: A semiconductor device has a stabilizing member that encloses an upper portion of a storage electrode to improve structural stability. A dielectric layer and a plate electrode are successively formed on the storage electrode including a stabilizing member. Since the stabilizing member includes a protruding portion to support the storage electrode and an adjacent storage electrode, all of the storage electrodes in a unit cell of a semiconductor device are structured to prevent a collapse. Also, the semdevice can have a very high height without collapse when the capacitors have extremely high aspect ratios. Therefore, the capacitors may have greatly enhanced capacitance in comparison with a conventional capacitor.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: August 22, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Je-Min Park