Patents Assigned to ROHM
  • Publication number: 20140049237
    Abstract: Provided is a switching power source device in which fluctuation of the switching frequency can be suppressed without impairing the advantages of a non-linear control system. A switching power source device is provided with: switching control units of non-linear control type that generate an output voltage (out) from an input voltage (IN) by performing ON/OFF control of switching elements in accordance with the results of comparing a feedback voltage (FB) and reference voltage (REF); and an ON time setting unit that monitors switching voltage (SW) appearing at one end of the switch terminals, and sets the ON time (Ton) of the switching element in the switching control units based on the duty of the switching voltage (SW).
    Type: Application
    Filed: April 19, 2012
    Publication date: February 20, 2014
    Applicant: ROHM CO., LTD.
    Inventors: Hideo Hara, Yoshio Higashida, Kazuhiro Murakami
  • Publication number: 20140050907
    Abstract: A marked substrate including a solid substrate surface such as, for example, a road surface having disposed thereon a first coating including a pigment and a first binder polymer, the first coating having a dry film thickness of from 10 microns to 5000 microns; the first coating having disposed thereon, a clear second coating including from 75% to 100%, by weight based on the weight of the clear coating, nanosilica and from 0% to 25%, by weight based on the weight of the clear coating, second binder polymer; the clear second coating having a dry film thickness of from 1 to 10 microns is provided. A method for providing the marked substrate is also provided.
    Type: Application
    Filed: August 12, 2013
    Publication date: February 20, 2014
    Applicant: ROHM AND HAAS COMPANY
    Inventors: Guy J. Clamen, Bruno Pollet
  • Publication number: 20140048876
    Abstract: A semiconductor device includes a high breakdown voltage DMOS transistor formed on a first conductivity type semiconductor substrate. The semiconductor device includes: a DMOS second conductivity type well; a DMOS first conductivity body region; a DMOS second conductivity type source region; a DMOS second conductivity type drain region; a LOCOS oxide film formed between the DMOS second conductivity type drain region and the DMOS first conductivity type body region; and a DMOS gate insulating film formed in succession to the LOCOS oxide film to cover a DMOS channel region between the DMOS second conductivity type source region and the DMOS second conductivity type well, wherein the DMOS gate insulating film includes a first insulating film which is disposed outside the DMOS channel region and a second insulating film which is disposed in the DMOS channel region and is thinner than the first insulating film.
    Type: Application
    Filed: August 15, 2013
    Publication date: February 20, 2014
    Applicant: ROHM CO., LTD.
    Inventor: Yushi SEKIGUCHI
  • Publication number: 20140051886
    Abstract: The present invention relates to a process for preparing methacrylic acid based on the hydrolysis of methacrylic esters.
    Type: Application
    Filed: April 24, 2012
    Publication date: February 20, 2014
    Applicant: EVONIK RÖHM GmbH
    Inventors: Dirk Broell, Hermann Siegert, Horst Hiltner, Thomas Krauss
  • Patent number: 8653800
    Abstract: The step-up DC/DC converter (30) of the present invention has a synchronous rectifier transistor (M1); an output transistor (M2); a first back-gate control transistor (M3) connected between an external terminal (T2) and a back gate of the synchronous rectifier transistor (M1); a discharge transistor (M6) connected between the external terminal (T2) and a ground terminal; and a control unit (X1) for controlling the on/off state of the components described above. The control unit (X1) switches off the first back-gate control transistor (M3) and switches on the discharge transistor (M6) when stopping the switching operation of the output transistor (M2) and the synchronous rectifier transistor (M1).
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: February 18, 2014
    Assignee: Rohm Co., Ltd.
    Inventors: Takatsugu Wachi, Masashi Nagasato, Yuki Iwata
  • Patent number: 8653774
    Abstract: A motor driving circuit may include a Hall sensor configured to generate a Hall signal according to the position of a rotor of a motor to be driven; a Hall bias circuit; an analog amplifier configured to amplify the Hall signal; an A/D converter configured to convert the Hall signal into a digital signal; an amplitude control circuit configured to adjust the amplitude of the digital signal; a control signal generating unit configured to generate a control signal to be used to drive the motor; and a driver circuit configured to drive the motor according to the control signal. The components may be monolithically integrated on a single semiconductor substrate. The amplitude control circuit may include an amplitude correction circuit; and a target amplitude judgment circuit configured to adjust the gain of the analog amplifier.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: February 18, 2014
    Assignee: Rohm Co., Ltd.
    Inventors: Tatsuro Shimizu, Hiroyuki Ishii, Nobuo Komura, Toshiya Suzuki
  • Patent number: 8653533
    Abstract: A method of manufacturing a semiconductor device includes the steps of forming a silicon oxide film on a silicon carbide substrate, annealing the silicon carbide substrate and the silicon oxide film in gas containing hydrogen, and forming an aluminum oxynitride film on the silicon oxide film after the annealing of the silicon carbide substrate and the silicon oxide film.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: February 18, 2014
    Assignee: Rohm Co., Ltd.
    Inventors: Shuhei Mitani, Yuki Nakano, Heiji Watanabe, Takayoshi Shimura, Takuji Hosoi, Takashi Kirino
  • Patent number: 8653657
    Abstract: There are provided a semiconductor device capable of accurately determining whether a semiconductor chip is bonded to a solid-state device such as the other semiconductor chip parallelly with each other, a semiconductor chip used for the semiconductor device, and a method of manufacturing the semiconductor chip. The semiconductor chip includes a functional bump projected with a first projection amount from the surface of the semiconductor chip and electrically connecting the semiconductor chip to the solid-state device, and a connection confirmation bump projected with a second projection amount, which is smaller than the first projection amount, from the surface of the semiconductor chip and used for confirming the state of the electrical connection by the functional bump.
    Type: Grant
    Filed: August 18, 2006
    Date of Patent: February 18, 2014
    Assignee: Rohm Co., Ltd.
    Inventors: Osamu Miyata, Tadahiro Morifuji
  • Patent number: 8653593
    Abstract: A semiconductor device includes a semiconductor layer provided with a gate trench, a first conductivity type source region exposed on a surface side of the semiconductor layer, a second conductivity type channel region formed on a side of the source region closer to aback surface of the semiconductor layer to be in contact with the source region, a first conductivity type drain region formed on a side of the channel region to be in contact with the channel region, a gate insulating film formed on an inner surface of the gate trench, and agate electrode embedded inside the gate insulating film in the gate trench, while the channel region includes a channel portion formed along the side surface of the gate trench and a projection projecting from an end portion of the channel portion closer to the back surface of the semiconductor layer toward the back surface.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: February 18, 2014
    Assignee: Rohm Co., Ltd.
    Inventor: Kengo Omori
  • Patent number: 8655064
    Abstract: An image compression circuit 1 of the invention includes an image calculator 11, a compression-system decision unit 12, and a compression processor 13. Compression-system decision unit 12 determines a variation of pieces of image data of four adjacent pixels based on a variation in luminance Y of the pixels or variations in luminance Y and saturation S of the pixels, compresses the image data into image data of one or two pixels (RGB 888 and RGB 787) expressed by an RGB color space having a small quantization error in the case of the small variation of the pieces of image data, and compresses the image data into data including the luminances of the four adjacent pixels and pieces of image data of two pixels (YCbCr 422) expressed by a YCbCr color space having a large quantization error in the case of the large variation of the pieces of image data.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: February 18, 2014
    Assignee: Rohm Co., Ltd.
    Inventor: Takateru Yamamoto
  • Patent number: 8653506
    Abstract: An organic electroluminescence device includes: a first electrode layer; an insulating film arranged on the first electrode layer; an organic layer that is arranged on the insulating film, and is in contact with the first electrode layer at an opening portion provided in the insulating film; a second electrode layer arranged on the organic layer; and a metal layer that is in contact with an end surface of the organic layer and an end surface of the second electrode layer, and is arranged on the second electrode layer.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: February 18, 2014
    Assignee: Rohm Co., Ltd.
    Inventor: Noriyuki Shimoji
  • Patent number: 8653180
    Abstract: The present invention provides compositions that enable excellent early hardness development in coating applications, the compositions comprising a blend of one or more copolymer, pA, having a Tg of 20° C. or higher, and one or more polyurethane copolymer in aqueous dispersion, pB, together with one or more additive chosen from a coalescent having a normal boiling point of from 150° C. to no greater than 300° C., a naturally derived plasticizer, and mixtures thereof. The polyurethane copolymer comprises at least 40 wt. %, based on the weight of polyurethane solids, of: (i) a first polyol having a molecular weight of at least 850, wherein the first polyol is a polyether polyol, or (ii) a second polyol chosen from a polyester, a polycaprolactam, a polycarbonate and a combination thereof, wherein the second polyol has a molecular weight of at least 1,500, or (iii) a combination of one or more first polyol and one or more second polyol. The compositions may be ambient curable.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: February 18, 2014
    Assignee: Rohm and Haas Company
    Inventors: Zhenwen Fu, Andrew Hejl, Aurelia C. Sheppard, Andrew J. Swartz
  • Patent number: 8653754
    Abstract: A current driving circuit may include a reference voltage input terminal; a resistor connection terminal; an output terminal via which the light emitting element is connected; a reference voltage generating unit; a transistor arranged such that one terminal thereof is connected to the resistor connection terminal; and an operational amplifier including first and second non-inverting input terminals and a single inverting input terminal, and arranged such that the output terminal thereof is connected to a control terminal of the transistor, the internal reference voltage is input to the first non-inverting input terminal, the external reference voltage is input to the second non-inverting input terminal, and the inverting input terminal thereof is connected to the resistor connection terminal. When the external resistor is connected between the resistor connection terminal and a ground terminal, a driving current is output via the output terminal.
    Type: Grant
    Filed: January 18, 2011
    Date of Patent: February 18, 2014
    Assignee: Rohm Co., Ltd.
    Inventors: Hiroki Kikuchi, Masao Yonemaru, Takashi Oki
  • Patent number: 8654991
    Abstract: An inverting amplifier which drives headphones via an output capacitor includes: an operational amplifier, an input resistor having a first terminal via which an audio signal to be amplified is received, and a second terminal connected to an inverting input terminal of the operational amplifier; and a feedback resistor having a first terminal connected to an inverting input terminal of the operational amplifier, and a second terminal connected to the output terminal. A reference voltage source generates a bias voltage Vb, and supplies it to the non-inverting input terminal. A discharging path includes a discharging resistor and a first switch arranged in series between an output terminal of the reference voltage source and an fixed voltage terminal. A second switch is arranged between the output terminal of the operational amplifier and a node on the discharging path where the electric potential is higher than it is at the discharging resistor.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: February 18, 2014
    Assignee: Rohm Co., Ltd.
    Inventors: Katsuyuki Ono, Akinobu Kawamura
  • Patent number: 8653656
    Abstract: The semiconductor device has the CSP structure, and may include a plurality of electrode pads formed on a semiconductor integrated circuit in order to input/output signals from/to exterior; solder bumps for making external lead electrodes; and rewiring. The solder bumps may be arranged in two rows along the periphery of the semiconductor device. The electrode pads may be arranged inside the outermost solder bumps so as to be interposed between the two rows of solder bumps. Each trace of the rewiring may be extended from an electrode pad, and may be connected to any one of the outermost solder bumps or any one of the inner solder bumps.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: February 18, 2014
    Assignee: Rohm Co., Ltd.
    Inventor: Kunihiro Komiya
  • Patent number: 8653875
    Abstract: Provided is a semiconductor device which inputs an input clock signal of predetermined frequency and outputs a plurality of clock signals of the same frequency, the semiconductor device including: an input unit configured to input the input clock signal of the predetermined frequency; and a delay unit configured to generate a plurality of clock signals of the same frequency by providing predetermined delay time period to the input clock signal to be delayed in order to reduce load applied to a power supply in common with the plurality of the clock signals. According to the semiconductor device, output waveform distortion of the clock signals can be improved even with simple structure.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: February 18, 2014
    Assignee: Rohm Co., Ltd.
    Inventors: Morihiko Tokumoto, Masayu Fujiwara, Satoshi Mikami
  • Patent number: 8653551
    Abstract: A light-emitting element, a light-emitting element unit and a light-emitting element package are provided, which are each reduced in reflection loss and intra-film light absorption by suppressing multiple light reflection in a transparent electrode layer and hence have higher luminance. The light-emitting element 1 includes a substrate 2, an n-type nitride semiconductor layer 3, a light-emitting layer 4, a p-type nitride semiconductor layer 5, a transparent electrode layer 6 and a reflective electrode layer 7, and the transparent electrode layer 6 has a thickness T satisfying the following expression (1): 3 ? ? 4 ? ? n + 0.30 × ( ? 4 ? ? n ) ? T ? 3 ? ? 4 ? ? n + 0.45 × ( ? 4 ? ? n ) ( 1 ) wherein ? is the light-emitting wavelength of the light-emitting element 4, and n is the refractive index of the transparent electrode layer 6.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: February 18, 2014
    Assignee: Rohm Co., Ltd.
    Inventors: Takao Fujimori, Yasuo Nakanishi
  • Patent number: 8653742
    Abstract: A control circuit of a switching power supply for supplying a drive voltage to a light emitting element is provided. The control circuit includes a pulse width modulator which generates a pulse signal whose duty ratio is adjusted such that a detection voltage corresponding to an output voltage of the switching power supply is equal to a predetermined reference voltage, a driver which drives a switching element of the switching power supply based on the pulse signal, and a standby control unit which stops driving of the switching element once a predetermined time has passed after a standby signal steps down to a level indicating a standby state, and to shut down the control circuit and a current source.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: February 18, 2014
    Assignee: Rohm Co., Ltd.
    Inventors: Hiroki Kikuchi, Jung-Nam In, Min-Ki Ahn
  • Publication number: 20140042471
    Abstract: A light-emitting apparatus includes a light-emitting, a first lead, a second lead, and a resin molded body configured to support the first lead and the second lead. The main surfaces of the first and second leads includes first and second coverage areas covered by the resin molded body and first and second exposure regions exposed from the resin molded body at a window portion of the resin molded body, respectively. First and second metal layers are provided to cover main surfaces of the first and second leads at first and second exposure regions, respectively.
    Type: Application
    Filed: January 29, 2013
    Publication date: February 13, 2014
    Applicant: ROHM CO., LTD.
    Inventor: ROHM CO., LTD.
  • Publication number: 20140045308
    Abstract: A semiconductor storage device according to the present invention includes: a semiconductor substrate; an embedded insulator embedded in a trench formed in the semiconductor substrate and having an upper portion protruding above a top surface of the semiconductor substrate; a first insulating film formed on the top surface of the semiconductor substrate; a floating gate formed on the first insulating film at a side of the embedded insulator, having a side portion arching out above the embedded insulator, and having a side surface made of a flat surface and a curved surface continuing below the flat surface; a second insulating film contacting an upper surface, the flat surface and the curved surface of the floating gate; and a control gate opposing the upper surface, the flat surface and the curved surface of the floating gate across the second insulating film.
    Type: Application
    Filed: October 15, 2013
    Publication date: February 13, 2014
    Applicant: ROHM CO., LTD.
    Inventor: Yuichi NAKAO