Patents Examined by Valencia Wallace
  • Patent number: 6072207
    Abstract: A liquid precursor containing a metal is applied to a substrate, RTP baked, and annealed to form a layered superlattice material. Special polyoxyalkylated precursor solutions are designed to optimize polarizability of the corresponding metal oxide materials by adding dopants including stoichiometric excess amounts of bismuth and tantalum. The RTP baking process is especially beneficial in optimizing the polarizability of the resultant metal oxide.
    Type: Grant
    Filed: March 17, 1995
    Date of Patent: June 6, 2000
    Assignees: Symetrix Corporation, Olympus Optical Co., Ltd.
    Inventors: Hiroyuki Yoshimori, Carlos A. Paz De Araujo, Takeshi Ito, Michael C. Scott, Larry D. McMillan
  • Patent number: 6054734
    Abstract: A non-volatile memory device in which gate electrodes are formed on an upper surface and a lower surface of the channel via insulating layers, respectively, one of them is used as a read electrode and the other is used as a write electrode, whereby, at a read operation, the reading is carried out with a reduced influence upon stored charges stored at the time of writing. Particularly, it has a structure in which a source and drain region of the non-volatile semiconductor memory device is formed in the semiconductor layer formed on the insulating layer and, at the same time, one of the read electrode and write electrode is buried in the insulating layer.
    Type: Grant
    Filed: November 5, 1997
    Date of Patent: April 25, 2000
    Assignee: Sony Corporation
    Inventors: Hiroshi Aozasa, Yutaka Hayashi
  • Patent number: 5939779
    Abstract: A bottom lead semiconductor chip stack package which includes a first body and a second body. The first body includes a pair of lead frames, each lead frame having a first lead portion and a second lead portion. A protrusion enclosed in a solder extends from the first lead portion. The first body also includes a semiconductor chip containing chip pads disposed on the surface thereof, the chip pads being connected to the solder enclosed protrusions. The second body has substantially the same structural configurations as the first body and is reversely stacked relative to the first body such that the semiconductor chips are disposed in opposing relationship relative to each other. An adhesive attaches the lead frames of the first body to the corresponding lead frames of the second body.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: August 17, 1999
    Assignee: LG Semicon Co., Ltd.
    Inventor: Yong Chan Kim
  • Patent number: 5905296
    Abstract: A resistive structure formed on an integrated circuit substrate is disclosed. The structure includes a plurality of resistive elements serially connected. Each resistive element comprises a forward biased semiconductor junction and a reverse biased semiconductor junction. The resistive value of each resistive element can be varied with a preferred range being from about 500 megohms to about 5 gigaohms. In fabrication, the multiple resistive elements are electrically and physically simultaneously formed and are connected in series to obtain higher resistive values. The disclosed resistive structure allows very high resistances to be obtained using very little planar surface area.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: May 18, 1999
    Assignee: Micron Technology, Inc.
    Inventor: Mark E. Tuttle
  • Patent number: 5903041
    Abstract: A two-terminal fuse-antifuse structure comprises a horizontal B-fuse portion and a vertical A-fuse portion disposed between two metallization layers of an integrated circuit device. The two-terminal fuse-antifuse can be programmed with a relatively high current applied across the two terminals to blow the B-fuse, or with a high voltage applied across the two terminals to program the A-fuse. Such a device, connected between two circuit nodes, initially does not provide an electrical connection between the two circuit nodes. It may then be programmed with a relatively high voltage to blow the A-fuse, causing it to conduct between the two circuit nodes. Then, upon application of a relatively high current between the two circuit nodes, the B-fuse will blow, making the device permanently non-conductive.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: May 11, 1999
    Assignee: Aptix Corporation
    Inventors: Michael David La Fleur, Ralph Whitten, Chun-Mai Liu, Alan E. Comer, Scott Graham, Yu-Lin Lee
  • Patent number: 5894158
    Abstract: A mask is used for lightly doped drain and halo implants in an integrated circuit device. The mask exposes only portions of the substrate adjacent to field effect transistor gate electrodes. Since the halo implant is made only near the transistor channels, where it performs a useful function, adequate device reliability and performance is obtained. Since the halo implant is masked from those portions of the active regions for which it is not necessary, active region junction capacitances are lowered. Such lowered capacitances result in an improved transistor switching speed. The mask used to define the lightly doped drain and halo implant region can be easily formed from a straight forward combination of already existing gate and active area geometries.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: April 13, 1999
    Assignee: STMicroelectronics, Inc.
    Inventor: Che-Chia Wei
  • Patent number: 5886366
    Abstract: A monolithic type active matrix semiconductor device comprises a substrate having an insulating surface, a first plurality of thin film transistors formed on the substrate, each having a first channel region comprising an amorphous silicon semiconductor film, and a second plurality of thin film transistors, each having a second channel region comprising a crystalline semiconductor film. The crystalline semiconductor film of the second plurality of thin film transistors has a substantially single crystalline structure (mono-domain structure) and is doped with a recombination center neutralizer at a concentration of 1.times.10.sup.16 to 1.times.10.sup.20 atoms/cm.sup.3. The crystalline semiconductor film of the second plurality of thin film transistors contains a catalyst element which is capable of promoting crystallization of silicon.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: March 23, 1999
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Satoshi Teramoto
  • Patent number: 5872389
    Abstract: Burst pressure P of an insulating layer positioned immediately on a fuse layer is defined by using planar width W of fuse layer and thickness t of insulating layer. The value of the planar width W of fuse layer and the value of the thickness t of insulating layer are set such that the value of burst pressure P is at most about 1000 kg/cm.sup.2. The value of the thickness t and the value of the planar width W are set such that the value t/W is at least 0.45 and at most 0.91. Consequently, stable fuse blowing becomes possible while reducing manufacturing cost.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: February 16, 1999
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yasumasa Nishimura, Keiko Ito, Hiroyuki Takeoka, Masanao Maruta, Masaharu Moriyasu
  • Patent number: 5864151
    Abstract: In a circuit configuration comprising an n-channel thin-film transistor and a p-channel thin-film transistor integrally produced on a single substrate, a lightly-doped drain (LDD) region is formed selectively in the n-channel thin-film transistor, and damages to semiconductor layers caused when implanting impurity ions are balanced between the n- and p-channel thin-film transistors. This configuration achieves a balance between the n- and p-channel thin-film transistors and thereby provides high characteristics CMOS circuit.
    Type: Grant
    Filed: February 10, 1997
    Date of Patent: January 26, 1999
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Takeshi Fukunaga
  • Patent number: 5861663
    Abstract: A electronic apparatus and a process for its manufacture are disclosed. The apparatus includes a planar card for accommodating an electronics module package having protruding solder columns and solder joints to mechanically mount and electrically connect the solder columns of the module to the planar card. The planar card includes a first side and a second side, a plurality of wiring lines forming a wiring pattern, and a plurality of vias extending at least partially through the card. Each of the vias includes at least one recessed area extending from one or both sides of the card. The recessed areas extending to a depth within the planar card sufficient to wick the solder joints, and the each of the recessed areas are shaped to provide surface tension to mechanically retain the solder joints.
    Type: Grant
    Filed: January 13, 1997
    Date of Patent: January 19, 1999
    Assignee: International Business Machines Corporation
    Inventors: Phillip Duane Isaacs, Miles Frank Swain, Connie Jean Mathison
  • Patent number: 5856702
    Abstract: The invention relates to a polysilicon resistor made by forming a film of polysilicon doped with an impurity on a dielectric film on a semiconductor substrate and patterning the polysilicon film. An object of the invention is to provide a polysilicon resistor which has a low resistance value and occupies a small area. A slot is formed in the dielectric film and is filled with the polysilicon film. The dielectric film and the patterned polysilicon film are overlaid with a second dielectric film, and a pair of contact windows are opened in the second dielectric film such that each contact window is partly over an end section of the slot. A plurality of parallel slots can be formed in the first dielectric film to further lower the resistance value or to further reduce the area of the patterned polysilicon film. As an alternative, at least one slot is formed in the substrate and is filled with a polysilicon film after depositing a dielectric film on the substrate surface including the surfaces in the slot(s).
    Type: Grant
    Filed: April 18, 1997
    Date of Patent: January 5, 1999
    Assignee: NEC Corporation
    Inventor: Takasuke Hashimoto
  • Patent number: 5852312
    Abstract: The flash EEPROM cell of split-gate type according to the present invention can prevent the degradation of the tunnel oxide film of the cell due to the band-to-band tunneling and the secondary hot carrier which are generated by a high electric field formed at the overlap region between the junction region and the gate electrode when programming and erasure operations are performed by a high voltage to the structure in which the tunneling region is separated from the channel with a thick insulation film.
    Type: Grant
    Filed: October 22, 1997
    Date of Patent: December 22, 1998
    Assignee: Hyundai Electronics Industries Co., Ltd.
    Inventor: Byung Jin Ahn
  • Patent number: 5850091
    Abstract: A semiconductor memory device wherein source lines of a memory cell array constituted by a plurality of memory cells arranged in the form of a matrix at intersecting points of word lines and bit lines are arranged in a row direction or a column direction and the source lines of the nonselected rows or the nonselected columns are inversely biased with respect to the semiconductor substrate, thereby to prevent erroneous reading by the leakage current at the time of reading data and further reduce the write current at the time of writing. Further, the read operation is kept from deteriorating by reducing the amplitude of the source line at the time of reading by setting the inverse bias voltage at a minimum constant voltage smaller than the power source voltage.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: December 15, 1998
    Assignee: Sony Corporation
    Inventors: Akira Li, Yutaka Hayashi, Akihiro Nakamura
  • Patent number: 5850096
    Abstract: A method for fabricating a semiconductor integrated circuit includes the steps of providing a conductor film on a substrate, providing an insulator film on the conductor film to form a layered structure, removing the insulator film selectively from a first part thereof corresponding to a conductor pattern to be formed, while remaining the insulator film on a second part thereof corresponding also to a conductor pattern to be formed, patterning the layered structure to form a conductor pattern defined by side walls, providing a side wall insulation to each of the side walls of the conductor pattern, providing a first local interconnect pattern on the first part of the conductor pattern such that the first local interconnect pattern establishes an electrical connection with the conductor pattern at the first part, and providing a second local interconnect pattern on the second part of the conductor pattern such that the second local interconnect pattern bridges across the conductor pattern at the second part, w
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: December 15, 1998
    Assignee: Fujitsu Limited
    Inventors: Tetsuo Izawa, Hiroshi Goto, Koichi Hashimoto
  • Patent number: 5847429
    Abstract: An ESD protection device is provided which reduces the layout area required, utilizing multiple-node configurations and multiple node electrical couplings.
    Type: Grant
    Filed: July 31, 1996
    Date of Patent: December 8, 1998
    Assignee: Integrated Device Technology, Inc.
    Inventors: Chuen-Der Lien, Paul Y. M. Shy
  • Patent number: 5844295
    Abstract: An interlayer insulating layer is formed to cover a fuse layer. A concave portion is provided on the surface of interlayer insulating layer located directly above fuse layer. A nitride layer as a passivation layer extends on the sidewalls of concave portion. In this way, a semiconductor device is obtained, the device having an improved moisture resistance, and in which a fuse can be easily blown by laser and a design rule of the region adjacent to the fuse can be improved.
    Type: Grant
    Filed: May 20, 1996
    Date of Patent: December 1, 1998
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masaki Tsukude, Kazutami Arimoto
  • Patent number: 5844270
    Abstract: A highly integrated flash memory device having a stable cell is provided.
    Type: Grant
    Filed: December 12, 1996
    Date of Patent: December 1, 1998
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Keon-soo Kim, Yong-bae Choi, Jong-weon Yoo
  • Patent number: 5841171
    Abstract: In forming an element isolating region in a silicon semiconductor layer of an SOI substrate, a silicon nitride film of a predetermined thickness is deposited over an oxide film formed on a SOI layer. The silicon nitride film is patterned in a design size of active regions, and side walls of a silicon nitride film are formed on the side surfaces of the patterned silicon nitride film. A first LOCOS process is carried out using the nitride film as an oxidation mask. A LOCOS film formed by the first LOCOS process is removed to form narrower concavities under the side walls. Then, another silicon nitride film is deposited, and is removed leaving portions thereof forming the concavities. Then, a second LOCOS process is carried out to form a LOCOS film as an element isolating region. The second LOCOS process uses the oxidation mask having the narrow cavities, so that stress at the boundary of the active region and the element isolation region is reduced, and the growth of bird's beaks can be suppressed.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: November 24, 1998
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Toshiaki Iwamatsu, Takashi Ipposhi, Yasuo Inoue
  • Patent number: 5841153
    Abstract: The present invention provides an improved static random access memory which can be manufactured into values as designed by photolithography. Second direct contract for connecting active region and ground line for first and second memory cells is provided at a boundary between the first memory cell and second memory cell. Second direct contact is divided into a plurality of portions.
    Type: Grant
    Filed: March 5, 1997
    Date of Patent: November 24, 1998
    Assignee: Mitsubishi DenkiKabushiki Kaisha
    Inventors: Hirotada Kuriyama, Masahiro Ishida, Yoshiyuki Ishigaki
  • Patent number: 5838055
    Abstract: Hydrogen fluoride undercut of oxide layers may be reduced by using a low pressure mixture of gaseous hydrogen fluoride and gaseous ammonia mixture. Organic photoresists can be used as a masking material when using the gaseous hydrogen fluoride/ammonia mixture without resulting in an enhanced reaction rate. In addition, because of the reaction conditions, the dimensions in the oxide layer being etched can be specifically sized smaller than openings made in the overcoating masking material.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: November 17, 1998
    Assignee: International Business Machines Corporation
    Inventors: Richard L. Kleinhenz, Wesley C. Natzle, Chienfan Yu