Dielectric Comprising Two Or More Layers, E.g., Buffer Layers, Seed Layers, Gradient Layers (epo) Patents (Class 257/E21.01)
  • Patent number: 7294544
    Abstract: A method for fabricating an improved metal-insulator-metal capacitor is achieved. An insulating layer is provided overlying conducting lines on a semiconductor substrate. Via openings through the insulating layer to the conducting lines are filled with metal plugs. A first metal layer is deposited overlying the insulating layer and the metal plugs. A capacitor dielectric layer is deposited overlying the first metal layer wherein capacitor dielectric layer is deposited as a dual layer, each layer deposited within a separate chamber whereby pinholes are eliminated. A second metal layer and a barrier metal layer are deposited overlying the capacitor dielectric layer. The second metal layer and the barrier metal layer are patterned to form a top plate electrode. Thereafter, the capacitor dielectric layer and the first metal layer are patterned to form a bottom plate electrode completing fabrication of a metal-insulator-metal capacitor.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: November 13, 2007
    Assignee: Taiwan Semiconductor Manufacturing Co., ltd.
    Inventors: Yen-Shih Ho, Jau-Yuann Chung, Chun-Hon Chen, Hun-Jan Tao
  • Patent number: 7291530
    Abstract: A method of manufacturing a semiconductor storage device having a capacitive element having a dielectric layer having a perovskite-type crystal structure represented by general formula ABO3 and a lower electrode and an upper electrode disposed so as to sandwich the dielectric layer therebetween; in the method are carried out forming, on a lower electrode conductive layer, using a MOCVD method, an initial nucleus containing at least one metallic element the same as a metallic element in the dielectric layer, forming, on the initial nucleus, using a MOCVD method, a buffer layer containing at least one metallic element the same as the metallic element contained in both the initial nucleus and the dielectric layer, in a higher content than the content of this metallic element contained in the initial nucleus, and forming, on the buffer layer, using a MOCVD method, the dielectric layer having a perovskite-type crystal structure.
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: November 6, 2007
    Assignee: NEC Electronics Corporation
    Inventors: Takashi Nakagawa, Takashi Hase
  • Patent number: 7282380
    Abstract: It is an object of the present invention to provide a method for manufacturing a semiconductor device, capable of keeping a peeling layer from being peeled from a substrate in the phase before the completion of a semiconductor element and peeling a semiconductor element rapidly. It is considered that a peeling layer tends to be peeled from a substrate because the stress is applied to a peeling layer due to the difference in thermal expansion coefficient between a substrate and a peeling layer, or because the volume of a peeling layer is reduced and thus the stress is applied thereto by crystallization of the peeling layer due to heat treatment. Therefore, according to one feature of the invention, the adhesion of a substrate and a peeling layer is enhanced by forming an insulating film (buffer film) for relieving the stress on the peeling layer between the substrate and the peeling layer before forming the peeling layer over the substrate.
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: October 16, 2007
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Junya Maruyama, Atsuo Isobe, Susumu Okazaki, Koichiro Tanaka, Yoshiaki Yamamoto, Koji Dairiki, Tomoko Tamura
  • Patent number: 7276438
    Abstract: A method of manufacturing a wiring substrate of the present invention, includes a step of preparing a substrate containing a semi-cured resin layer or a thermo plastic resin layer, a step of forming a through hole that passes through the substrate, a step of inserting a conductive parts in the through hole, a step of curing the semi-resin layer or the thermo plastic resin layer in a state that the resin layer is made to flow by applying a thermal press to the substrate and filling a clearance between the through hole and the conductive parts with the resin layer, and a step of forming a wiring pattern, which is connected mutually via the conductive parts, on both surface sides of the substrate.
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: October 2, 2007
    Assignee: Shinko Electric Industries Co., Ltd.
    Inventors: Yasuyoshi Horikawa, Keiichi Takemoto
  • Patent number: 7259071
    Abstract: A method for making a semiconductor device having a first active region and a second active region includes providing first and second isolation structures defining the first active region on a substrate. The first active region uses a first operational voltage, and the second active region uses a second operational voltage that is different from the first voltage. A nitride layer overlying the first and second active regions is formed. An oxide layer overlying the nitride layer is formed. A first portion of the oxide layer overlying the first active region is removed to expose a first portion of the nitride layer. The exposed first portion of the nitride layer is removed using a wet etch method while leaving a second portion of the nitride layer that is overlying the second active region intact.
    Type: Grant
    Filed: October 25, 2004
    Date of Patent: August 21, 2007
    Assignee: SilTerra Malaysia Sdn.Bhd.
    Inventors: Inki Kim, Sang Yeon Kim, Min Paek, Chiew Sin Ping, Wan Gie Lee, Choong Shiau Chien, Zadig Lam, Hitomi Watanabe, Naoto Inoue
  • Patent number: 7256144
    Abstract: A method for forming a capacitor insulation film includes the step of depositing a monoatomic film made of a metal by supplying a metal source including the metal and no oxygen, and depositing a metal oxide film including the metal by using a CVD technique. The method provides the metal oxide film having higher film properties with a higher throughput.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: August 14, 2007
    Assignee: Elpida Memory, Inc.
    Inventors: Kenichi Koyanagi, Hiroshi Sakuma
  • Patent number: 7223685
    Abstract: The present application discloses process comprising providing a wafer, the wafer comprising an inter-layer dielectric (ILD) having a feature therein, an under-layer deposited on the ILD, and a barrier layer deposited on the under-layer, and a conductive layer deposited in the feature, placing the wafer in an electrolyte, such that at least the barrier layer is immersed in the electrolyte, and applying an electrical potential between the electrode and the wafer.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: May 29, 2007
    Assignee: Intel Corporation
    Inventors: Tatyana N. Andryushchenko, Anne E. Miller
  • Patent number: 7198999
    Abstract: A graded composition, high dielectric constant gate insulator is deposited between a substrate and floating gate in a flash memory cell transistor. If the composition of the gate insulator is closer to the high-k material near the substrate, the electron barrier for hot electron injection will be lower. If the gate insulator is closer to the high-k material near the floating gate, the tunnel barrier can be lower at the floating gate.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: April 3, 2007
    Assignee: Micron Technology, Inc.
    Inventor: Leonard Forbes
  • Patent number: 7192828
    Abstract: A stabilized capacitor using non-oxide electrodes and high dielectric constant oxide dielectric materials and methods of making such capacitors and their incorporation into DRAM cells is provided. A preferred method includes providing a non-oxide electrode, oxidizing an upper surface of the non-oxide electrode, depositing a high dielectric constant oxide dielectric material on the oxidized surface of the non-oxide electrode, and depositing an upper layer electrode on the high dielectric constant oxide dielectric material.
    Type: Grant
    Filed: April 7, 2004
    Date of Patent: March 20, 2007
    Assignee: Micron Technology, Inc.
    Inventors: Cem Basceri, Gurtej S. Sandhu, Sam Yang
  • Patent number: 7189626
    Abstract: A method of forming a metal cap over a conductive interconnect in a chalcogenide-based memory device is provided and includes, forming a layer of a first conductive material over a substrate, depositing an insulating layer over the first conductive material and the substrate, forming an opening in the insulating layer to expose at least a portion of the first conductive material, depositing a second conductive material over the insulating layer and within the opening, removing portions of the second conductive material to form a conductive area within the opening, recessing the conductive area within the opening to a level below an upper surface of the insulating layer, forming a cap of a third conductive material over the recessed conductive area within the opening, the third conductive material selected from the group consisting of cobalt, silver, gold, copper, nickel, palladium, platinum, and alloys thereof, depositing a stack of a chalcogenide based memory cell material over the cap, and depositing a cond
    Type: Grant
    Filed: November 3, 2004
    Date of Patent: March 13, 2007
    Assignee: Micron Technology, Inc.
    Inventors: Patricia C. Elkins, John T. Moore, Rita J. Klein
  • Patent number: 7176052
    Abstract: A method of formation of a capacitor forming part of an electric circuit when producing a circuit board, consisting of forming a valve metal bottom electrode layer and a valve metal oxide dielectric layer on the same, then integrally forming a solid electrolyte layer comprised of an organic semiconductor and a top electrode layer comprised of metal on the same, this integral formation step consisting of the step of holding one surface of metal foil for the top electrode at a bonding wedge and making the other surface of the metal foil carry a powder of the organic semiconductor by compression bonding and heating and the step of compression bonding the organic semiconductor powder carried by compression bonding at the dielectric layer by a bonding wedge through metal foil, whereby a solid electrolyte layer comprised of an organic semiconductor sandwiched between the metal foil and dielectric layer and closely bonded with the two is formed, a capacitor built into a circuit board, a circuit board including a cap
    Type: Grant
    Filed: March 2, 2005
    Date of Patent: February 13, 2007
    Assignee: Shinko Electric Industries Co., Ltd.
    Inventors: Hiroko Koike, Takashi Mochizuki, Mitsutoshi Higashi
  • Patent number: 7172947
    Abstract: A transition metal oxide dielectric material is doped with a non-metal in order to enhance the electrical properties of the metal oxide. In a preferred embodiment, a transition metal oxide is deposited over a bottom electrode and implanted with a dopant. In a preferred embodiment, the metal oxide is hafnium oxide or zirconium oxide and the dopant is nitrogen. The dopant can convert the crystal structure of the hafnium oxide or zirconium oxide to a tetragonal structure and increase the dielectric constant of the metal oxide.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: February 6, 2007
    Assignee: Micron Technology, Inc
    Inventors: Jiutao Li, Shuang Meng
  • Patent number: 7160779
    Abstract: A method for making a semiconductor device is described. That method comprises forming a high-k gate dielectric layer that contacts a metal oxide layer. The metal oxide layer is generated by forming a metal layer, then oxidizing the metal layer.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: January 9, 2007
    Assignee: Intel Corporation
    Inventors: Mark L. Doczy, Jack Kavalieros, Justin K. Brask, Matthew V. Metz, Suman Datta, Brian S. Doyle, Robert S. Chau
  • Patent number: 7105461
    Abstract: A composite dielectric forming method includes atomic layer depositing alternate layers of hafnium oxide and lanthanum oxide over a substrate. The hafnium oxide can be thermally stable, crystalline hafnium oxide and the lanthanum oxide can be thermally stable, crystalline lanthanum oxide. A transistor may comprise the composite dielectric as a gate dielectric. A capacitor may comprise the composite dielectric as a capacitor dielectric.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: September 12, 2006
    Assignee: Micron Technology, Inc.
    Inventors: Kie Y. Ahn, Leonard Forbes