Nsk Corporation

Sandisk Technologies Inc.

Fujitsu Corporation

Sharp Kabushiki Kaisha Corporation

Sharp Kabushuki Kaisha

Takashi Murai

Osamu Fujii

Shinichi Tsunashima

Takashi Yoshida

Shinichi Natsumeda

Tatsunobu Momono

Hironari Sakoda

Keijiro Yamaguchi

Katsuhiro Yamazaki

Haruki Tsutsui

Hiroyuki Ogawa

Tetsuo Watanabe

Toshiyuki Tanaka

Ken Oowada

Toru Miwa

Koji Ueda

Shih-Chung Lee

Manabu Ohori

Yoshio Shoda

Hideki Koizumi

Toshihisa Ohata

Yasushi Mutoh

Magozou Hamamoto

Banda Noda

Kouji Ueda

Masahito Matsui

Katsuhiro Konno

Suguru Toyokawa

Kenji Okuma

Eiichi Takahashi

Masaru Kabashima

Morio Sorimachi

Miki Amano

Nisha Padattil Kuliyampattil

Masatake Ichimaru

Satoshi Ushimaru

Kazuyuki Shimada

Setsu Kawaguchi

Manabu Kusaka

Michitsugu Mori

Masahiro Ohara

Yoshinari Kagota

Reiko Aoyama

Kenji Kotaki

Takayuki Matsushita

A semiconductor wafer includes pairs of semiconductor dies having test pads which are electrically coupled to each other to enable testing of pairs of semiconductor dies together at the same time. In this way, even wafers having large numbers of semiconductor dies can be tested with a semiconductor test assembly in a single touch-down test process.

Semiconductor wafer configured for single touch-down testing

A roller includes chamfered portions and roller inclined surfaces formed on both axial ends of a roller outer circumferential surface. When in a cross section taken along a plane including a rotation axis of the roller and a bearing central axis, an intersection angle between a tangent line of the roller inclined surface at the first position of the roller inclined surface corresponding to an end portion of a guide surface and a perpendicular line of the rotation axis is defined as α, an intersection angle between a tangent line of the roller inclined surface at the second position corresponding to a boundary between the chamfered portion and the roller inclined surface and a perpendicular line of the rotation axis is defined as β, and an intersection angle between the guide surface and a perpendicular line of the bearing central axis is defined as θ, α<θ<β is satisfied.

Roller bearing, roller bearing unit, motor, method for manufacturing roller bearing, and method for silencing roller bearing

For a non-volatile memory die formed of multiple blocks of memory cells, the memory die has a multi-bit bad block flag for each block stored on the memory die, such as in a fuse ROM. For each block, the multi-bit flag indicates if the block has few defects and is of the highest reliability category, is too defective to be used, or is in of one of multiple recoverability categories. The multi-bit bad blocks values can be determined as part a test process on fresh devices, where the test of a block can be fail stop for critical category errors, but, for recoverable categories, the test continues and tracks the test results to determine a recoverability category for the block and write this onto the die as a bad block flag for each block. These recoverability categories can be incorporated into wear leveling operations.

Block quality classification at testing for non-volatile memory, and multiple bad block flags for product diversity

The contact portion of the end face of a conical roller, which is a portion to be slidingly contacted with a collar portion, is ground such that the outer contour line of the section thereof has a continuously curved line which passes through at least not only the first point but also between the third position and fourth position.

Roller bearing

A cageof a tapered roller bearingholds tapered rollersby plural pockets formed between a large-diameter side annular partand a small-diameter side annular partarranged in an axial direction, and plural bar partswhich axially join the large-diameter side annular partand the small-diameter side annular partand are circumferentially formed at substantially an equal distance. A value of a ratio of a cross section modulus of the small-diameter side annular partof the cageto a cross section modulus of the large-diameter side annular partof the cageis values from 0.5 to 1.5 (both inclusive).

Tapered roller bearing

When performing a handover of a user equipment, a base station selects one of first and second algorithms based on a handover state of the user equipment. Then, the base station determines a format of a communication channel with the user equipment based on the selected algorithm and quality of communication with the user equipment.

Apparatus and method for determining a format of a wireless communication channel based on a handover state

Disclosed herein is an electrolytic erosion preventing insulated rolling bearing and a manufacturing method thereof. In one embodiment, the electrolytic erosion preventing insulated rolling bearing includes an insulating coating being a ceramic coating layer including alumina as the main component and 0.01 to 0.2 percent by weight titanium oxide with the alumina having a particle size ranging from 10 to 50 &#x3bc;m and average particle size ranging from 15 to 25 &#x3bc;m.

Electrolytic erosion preventing insulated rolling bearing, manufacturing method thereof, and bearing device

There is realized a self-aligning roller bearing with retainer that stabilizes the orientation of spherical rollers and prevents these spherical rollers from skewing, and which can be rotated at high speed, and furthermore which enables efficient lubricant feed into pockets By rotating a turning toolas it revolves, the surfaces on both sides in the circumferential direction of respective column sections are processed into concave curved surfaces that oppose a rolling surface of the respective spherical rollers across a pocket clearance into which lubricant oil can be fed. The length of the column sectionsis less than the length in the axial direction of the spherical rollers, and greater than a half of the length, and an end portion of the side surface in the circumferential direction of the respective column sectionsprojects further in the circumferential direction than an intermediate portion thereof, and the spherical rollers are embraced in the pockets

Self-aligning roller bearing with retainer and manufacturing method for self-aligning roller bearing retainer

A control system includes a first network including a controller, a second network including one or more controlled devicesto, and a translatorcorrelated with the first network and with the second network. The controlled devicecomprises a controlled device information management unitwhich manages controlled device information related to the controlled device; and a controlled device information communication unitwhich sends controlled device information with appropriate timing. The translatorcomprises a controlled device information proxy creating means which creates controlled device information proxiesbased on controlled device information acquired from controlled devices; and an information managing means for registering and managing controlled device information and controlled device information proxies. The controllercomprises a means which acquires controlled device information proxiesfrom the translatorand issues operating instructions for operating the controlled devicesto. With this control system, an operator at a remote operation center can easily and remotely control equipment belonging to a network different from a network to which the remote operation center belongs.

Control system

A method of producing rolling elements for a rolling bearing comprises mixing to process rounded elements made of steel balls and spherical rolling elements having outer diameter portion portion becoming a rolling contact face. The rolling contact face has curvatures in an axial direction and a radial direction normal to the axial direction, and has at least one plane. The thus mixed elements are placed and processed in a space between two processing boards opposing each other via the determined space. Thereby, the surfaces of the rounded balls and the rolling elements are processed to be rounded.

Rolling elements for rolling bearing, method of producing the same, and rolling bearing

A radial roller bearing has: an outer ring; an inner ring; and, a cylindrical roller interposed between the outer ring and the inner ring, the outer and inner rings respectively including flange portions formed in the end portions thereof so as to be opposed to the end face of the cylindrical roller, wherein, in the end face of the cylindrical roller, there is formed a circular-ring-shaped contact portion of the roller end having centers of curvature continuously existing on a circle which lies on a plane parallel to the end face of the cylindrical roller and also the center of the circle is on the rotation axis of the cylindrical roller.

Radial roller bearing

In machining a pocket () installing therein a rolling element, tools () are prepared whose milling parts () have contours which coincide with the sectional configuration of the pocket resulting when the pocket has been machined along a retainer radial direction (Z), and the milling parts () of the tools () are inserted into a prepared hole for the pocket which is provided in advance and are then translated in a retainer revolving direction (Y) and axial direction (X), respectively, for forming the pocket. Accordingly, it is possible to provide a retainer for rolling bearings that has high accuracy in machining pockets and which is suitable for an integral one-piece retainer.

Retainer for rolling bearings

A brass is a base material, and a material containing Mn and Si is cast to make a ring material. Ametallic structure in the cross section of the ring material is under a condition where an intermetallic compound Mn Si is uniformly and finely scattered and precipitated in the base material (brass composed of &agr;- and &bgr;-phase). A machined retainer provided by matching said material has an excellent sizing precision, sound affect resistance.

Retainer

Growing community of inventors

Kanagawa, Japan

Takashi Murai