Anti-reflection coating for optical component and method for forming the same
What is claimed is: 1. An optical component comprising a substrate for said optical component and an anti-reflection coating, formed on said substrate by subjecting a mixture of 10 to 30% of SiO.sub.2... Read More
Inventors: Ichikawa, Hajime;, Assignee: Olympus Optical Company Limited (Tokyo, JP) |
Printed circuit board fabrication
It is an object of the present invention to provide a lamination that will eliminate most if not all of the above-mentioned problems. It is a further object of this invention to reduce the need for in... Read More
Inventors: Grundfest, Michael A.; Grundfest, Joseph A.;, Assignee: |
Composite copper nickel alloys with improved solderability shelf life
What is claimed is: 1. A composite structure having a reduced growth of copper-tin intermetallic compounds, said composite structure comprising: a substrate formed from a copper base alloy; said coppe... Read More
Inventors: Fister, Julius C.; Breedis, John F.;, Assignee: Olin Corporation (New Haven, CT) |
Disk drive with thermal asperity reduction circuitry using a magnetic tunnel junction sensor
It is an object of the present invention to disclose a magnetic tunnel junction (MTJ) sensor for substantially eliminating the thermal asperity phenomena in disk drives utilizing MTJ sensors. It is an... Read More
Inventors: Gill, Hardayal Singh;, Assignee: International Business Machines Corporation (Armonk, NY) |
Zero-voltage switched FM-PWM converter
A variable-frequency pulse-width-modulated boost converter is provided which allows for operation at very high frequencies with minimal transient turn-on losses. A frequency control scheme is utilized... Read More
Inventors: Ewing, Gerald D.;, Assignee: |
Current-limiting circuit
In order to achieve the above objectives, the present invention provides a current-limiting circuit in which first and second main terminals of a main semiconductor element are used as the terminals o... Read More
Inventors: Fujihira, Tatsuhiko;, Assignee: Fuji Electric Co., Ltd. (Kawasaki, JP) |
Transient over voltage protection circuit for electrical power converters
Broadly stated, the present invention comprises an overvoltage detection circuit that partially opens a normally closed switch connected between a rectifier circuit and a DC-to-DC converter before the... Read More
Inventors: Cross, David A.;, Assignee: Astec International, Ltd. (HK) |
Short circuit protection for power factor correction circuit
The present invention accomplishes the desired result by monitoring not the power MOSFET current itself, but rather the relationship between the input voltage and the output voltage. A function of the... Read More
Inventors: Ho, Simon Mo Chan;, Assignee: Astec International Limited (Wanchai, HK) |
Power mosfet having current detection means
Accordingly, it is an object of the present invention to provide a power MOSFET device which has overcome the above mentioned defects of the conventional ones. Another object of the present invention ... Read More
Inventors: Takahashi, Mitsuasa;, Assignee: NEC Corporation (Tokyo, JP) |
Soft-start switch with voltage regulation and current limiting
An advantage of the present invention is a soft-start switch with regulation of voltage drop across the soft-start switch, i.e., V.sub.0 -V.sub.out, so that load sharing among a plurality of power sup... Read More
Inventors: Goerke, Ulrich B.; Pieper, Mark S.;, Assignee: Data General Corporation (Westborough, MA) |
Apparatus and method for digital control of a power converter current
OF THE PREFERRED EMBODIMENT While the specification concludes with claims defining the features of the invention that are regarded as novel, it is believed that the invention will be better understoo... Read More
Inventors: Oglesbee, John W.;, Assignee: Motorola, Inc. (Schaumburg, IL) |
DC-to-DC converter capable of preventing overvoltages
The present invention has an object to provide a compact synchronous rectification mode voltage drop type DC/DC converter with a high converting efficiency. Concretely speaking, this DC/DC converter c... Read More
Inventors: Saeki, Mitsuo; Yano, Hidetoshi; Ozawa, Hidekiyo;, Assignee: Fujitsu Limited (Kawasaki, JP) |
Protected telecommunication test adapter module
The problems with the prior art are overcome by the test adapter of the present invention. The present invention is a telecommunications test adapter that is modular, protected from current surges, an... Read More
Inventors: Mathieu, Randall E.; Olsen, William R.;, Assignee: NEC America, Inc. (Hillsboro, OR) |
Recording system having head transducers with controlled skew
OF THE PREFERRED EMBODIMENT The invention is best understood by reference to the figures wherein like parts are designated with like numerals throughout. One presently preferred embodiment of the mag... Read More
Inventors: Eggebeen, James A.;, Assignee: Carlisle Memory Products Group Incorporated (North Richland Hills, TX) |
Magnetic recording medium
An object of the present invention is to provide a ferromagnetic metal thin film type of magnetic recording medium which permits one to obtain a high reproducing output and a high C/N over a broad rec... Read More
Inventors: Funabashi, Makoto; Abe, Naoto; Sasazawa, Koji;, Assignee: Fuji Photo Film Co., Ltd. (Kanagawa, JP) |
Magneto-resistive head using flux guide
What is claimed is: 1. A separate type magneto-resistive head for magnetically reproducing an output from a recording medium, including a magneto-resistive layer performing the reproducing with a magn... Read More
Inventors: Mizoshita, Yoshifumi; Koshikawa, Takao; Kanai, Hitoshi; Kane, Junichi; Otsuka, Yoshinori; Ikegawa, Yukinori;, Assignee: Fujitsu Limited (Kawasaki, JP) |
Longitudinal magnetic recording media and magnetic memory units
As discussed above, it may be said that there have been strong demands for highly reliable magnetic recording media which further permit high S/N ratio and high density according to a conventional lon... Read More
Inventors: Shiroishi, Yoshihiro; Yamashita, Takeo; Hishiyama, Sadao; Kumasaka, Noriyuki; Matsuda, Yoshibumi; Suzuki, Hiroyuki; Takagi, Kazumasa; Tsumita, Norikazu; Ohura, Masaki; Ohno, Tomoyuki;, Assignee: Hitachi, Ltd. (Tokyo, JP) |
Thin-film recording medium with thin metal sublayer
The present invention includes, in one aspect, an improvement in a magnetic film recording medium of the type having (a) a disc-like non-metallic substrate, (b) a sputtered Cr underlayer having a thic... Read More
Inventors: Lal, Brij B.; Shinohara, Tadashi;, Assignee: HMT Technology Corporation (Fremont, CA) |
Process of making a magnetic recording medium
We claim: 1. A process for the manufacture of a magnetic recording medium by vacuum-depositing a recording layer of an Sm-Co alloy onto a non-magnetic base which is dimensionally stable at up to 300.d... Read More
Inventors: Kneller, Eckhart; Koenig, Roland; Koester, Eberhard; Grau, Werner; Mayer, Dieter;, Assignee: BASF Aktiengesellschaft (DE) |
Magnetic recording disk and sputtering process and apparatus for producing same
The present invention provides a continuous production from a direct current planar magnetron sputtering apparatus for the mass production of magnetic thin film memory disks, a process for using the s... Read More
Inventors: Hedgcoth, Virgle L.;, Assignee: Cyberdisk, Inc. (Anaheim, CA) |
Method of forming thin-film recording medium
It is one general object of the invention to provide a thin film medium having high coercivity, remanence, and loop squareness. It is another object of the invention to provide a sputtering method for... Read More
Inventors: Lal, Brij B.; Eltoukhy, Atef H.;, Assignee: HMT Technology Corporation (Fremont, CA) |
Longitudinal magnetic recording media with fine grain crystal magnetic layer
OF THE EMBODIMENTS The surface of a disk substrate of an aluminum alloy containing 4% by weight of magnesium was made smooth by machining so that the substrate had an external diameter of 95 mm, an i... Read More
Inventors: Shinohara, Tadashi; Ichikawa, Koji; Fujii, Shigeo;, Assignee: Hitachi Metals, Ltd. (Tokyo, JP) |
Magnetic recording medium comprising an underlayer and a cobalt samarium amorphous magnetic layer having a SmCo.sub.5 crystalline interface with the underlayer
The present invention pertains to a thin film media structure for high density longitudinal magnetic recording. The thin film media structure is comprised of a substrate. The thin film media structure... Read More
Inventors: Lambeth, David N.; Velu, E. M. T.;, Assignee: Carnegie Mellon University (Pittsburgh, PA) |
Oxidation resistant low expansion superalloys
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows: 1. An oxidation resistant alloy having a relatively low coefficient of thermal expansion... Read More
Inventors: Smith, John S.; Smith, Jr., Darrell F.; Fisher, Roneldo L.; Heck, Karl A.;, Assignee: Inco Alloys International, Inc. (Huntington, WV) |
Electric contact material and a manufacturing method therefor
OF THE INVENTION As shown in the sectional view of the FIGURE, an electric contact material according to the present invention is composed of a contact substrate 1 and a coating layer 2 (mentioned la... Read More
Inventors: Suzuki, Satoshi; Murakawa, Mitsuru;, Assignee: The Furukawa Electric Co., Ltd. (Tokyo, JP) |
Nickel alloy
OF PREFERRED EMBODIMENT The alloy of the present invention comprises 8 to 34 atom% of Al, 2 to 70 atom% of at least one element selected from the group consisting of Fe, Co, Mn and Si (providing that... Read More
Inventors: Masumoto, Tsuyoshi; Inoue, Akihisa; Tomioka, Hiroyuki;, Assignee: Masumoto; Tsuyoshi (Miyagi, JP); Unitika Ltd. (Hyogo, JP) |
Magneto-optic memory allowing direct overwrite of data
In accordance with the present invention, a magneto-optic media is described comprising a first bias layer of first magnetic material having high coercivity and a square magnetization loop characteris... Read More
Inventors: Gambino, Richard J.; Ruf, Ralph R.;, Assignee: International Business Machines Corporation (Armonk, NY) |
Thin-film recording medium with soft magnetic layer
In one aspect, the invention includes an improvement in a longitudinal magnetic recording medium for use with a zero-bias read-write head having (i) a substrate, (ii) a sputtered chromium underlayer, ... Read More
Inventors: Lal, Brij B.; Shinohara, Tadashi;, Assignee: HMT Technology Corporation (Fremont, CA) |
Metal thin film magnetic recording medium and manufacturing method thereof
As has been described above, the isotropic texture has been formed for decreasing the flying height of the magnetic head and improvement of R/W characteristics, but formation of the equi-directional t... Read More
Inventors: Okumura, Yoshinobu; Yang, Xingbo;, Assignee: Kubota Corporation (Osaka, JP) |
Fuel cells employing integrated fluid management platelet technology
OF THE BEST MODE The following detailed description illustrates the invention by way of example, not by way of limitation of the principles of the invention. This description will clearly enable one ... Read More
Inventors: Spear, Jr., Reginald G.; Mueggenberg, H. Harry; Hodge, Rex;, Assignee: H Power Corporation (Belleville, NJ) |
Metal Working 
