Ngk Insulators, Inc.

Tomio Suzuki

Fuminori Takeya

Masahiro Abe

Tadashi Otagiri

Itsushi Nakamura

Ritsu Tanaka

Shuhei Ishikawa

Takao Tani

Hisayoshi Nonaka

Yoshitaka Tabuchi

Masahiro Hori

Satoru Kawai

Yasushi Ohkawa

Eiji Kitagami

Hiroyuki Ohi

Yasushi Okawa

A method and apparatus ( ) are used for manufacturing a wire structure wherein a wire ( ) is three-dimensionally aligned at prescribed pitches. The method comprises the steps of providing one or more frame bodies ( ) which have a prescribed thickness, peripherally of a rotary shaft ( ). By rotating rotary shaft ( ) about a rotation axis thereof, wires ( ) are wound, at prescribed pitches, around frame bodies ( ). Another frame body ( ) is stacked on at least one existing frame body and wire ( ) is wound thereon at prescribed pitches. The above steps are repeated to yield a wire structure having a wire aligned three-dimensionally and accurately at prescribed pitches.

Method and device for three-dimensional arrangement of wire and method of manufacturing conductive material

There is provided a substrate material for wiring having an excellent thermal resistance, and durability and reliability under severe conditions, characterized in that said substrate material comprises an insulator whose major component is composed of epoxy resin and ceramics having a thermal expansion coefficient of 2 ppm/&deg; C. or less, and that the thermal expansion coefficient is isotropic.

Substrate material for wiring and substrate material for printed circuit using the same

A substrate material ( ) for printed circuit, comprising a sheet-shaped composite material ( ) composed of a plastic and a ceramic and conductive metal wires ( ) fixed in the composite material ( ) at given pitches, wherein the two surfaces of the substrate material ( ) have electrical connection to each other via the metal wires ( ). A process for producing a substrate material for printed circuit, which comprises stretching, in a mold, conductive metal wires at given pitches, then pouring, into the mold, a composite material composed of a plastic and a ceramic, curing the composite material, thereafter slicing the resulting material in a direction approximately perpendicular to the direction of the metal wires. Good electrical connection can be secured, and it is possible to prevent, during use, peeling between substrate material and conductive layers and between insulating material and metal wires. A printed circuit board of high density and excellent dimensional accuracy can be obtained.

Printed circuit board material and method of manufacturing board material and intermediate block body for board material

A method of detecting an overcoating rubber flowed in a space between a core member and a securing metal fitting of a polymer insulator having the core member, the overcoating arranged around the core member and the securing metal fitting fixed to at least one end of the core member, is disclosed. The method includes the steps of: applying a torque in a circumferential direction to the securing metal fitting, after forming the overcoating rubber but before fixing the securing metal fitting to the core member; deforming an index provided on a surface of the overcoating; and detecting whether the overcoating rubber is existent or not in the space between the securing metal member and the core member in response to a deforming extent indicated by the index.

Method of detecting overcoating rubber flowed in space between core member and securing metal fitting of polymer insulator

Substrates for magnetic discs, magnetic discs and process for producing

A securing method of a polymer insulator including the steps of inserting an FRP core into a depression portion of a metal member having an open end portion, and connecting the metal member to the FRP core by compressing the FRP core and the metal member is disclosed. The improvement includes the steps of: determining a first region defining a part of a compression portion of the metal member, to which a compression pressure is applied, from a side of the open end portion; determining a second region defining the other part of the compression portion in succession with the first region; and controlling a deformation of the first region in such a manner that a deformation amount of the first region is increased gradually toward the second region.

Securing method of polymer insulator and die used for this method

A magnetic disc substrate is provided, which includes a magnetic disc substrate body made of glass and is characterized in that a metal element capable of absorbing light in at least a surface portion of the magnetic disc substrate body, and a texture is formed on a surface of the magnetic disc substrate body. Ions of the metal element are dispersed in the surface portion of the magnetic disc substrate, or the metal element is contained in a composition of the glass constituting the magnetic disc substrate in the form of an oxide. The glass is preferably a crystallized glass a Li.sub.2 O--Al.sub.2 O.sub.3 --SiO.sub.2 based crystallized glass, which particularly preferably contains 65 to 85 wt % of SiO.sub.2, 8 to 15 wt % of Li.sub.2 O, 2 to 8 wt % of Al.sub.2 O.sub.3, 1 to 5 wt % of P.sub.2 O.sub.5 and 1 to 10 wt % of ZrO.sub.2 and has lithium disilicate (Li.sub.2 O.2SiO.sub.2) as a main crystalline phase.

A nondestructive inspection method of inspecting a securing defect of a polymer insulator having an FRP core, an outer cover portion arranged around the FRP core, and at least one metal member secured to at least one end of the FRP core, includes the steps of; measuring an acoustic emission signal generated when the metal member is secured to the FRP core by using compression dies; and determining whether or not the securing defect is generated on the basis of the acoustic emission signal in process. Moreover, the disclosed apparatus performs the nondestructive inspection method mentioned above.

Nondestructive inspection method of polymer insulator and apparatus for

A process for producing a crystallized glass substrate for magnetic disks, including the steps of: (a) holding an amorphous glass plate having a uniform thickness and two principal flat surfaces thereof between a pair of pressing setters in a sandwiched fashion, which pressing setters are non-reactive with the amorphous glass and undeformable during heating for crystallization of the amorphous glass; (b) softening the amorphous glass plate in a sandwiched stack form by heating at a temperature above an annealing point of the amorphous glass, whereby the principal surfaces are fitted onto the flat surfaces of the pressing setters to rectify warping to flatten the amorphous glass plate; and (c) then, increasing the temperature to a crystal growth temperature to grow crystals within the amorphous glass, whereby the amorphous glass plate is crystallized as maintaining its warp-free state, followed by solidifying.

Process for manufacturing a crystallized glass substrate for magnetic

A magnetic head core for a magnetic head including a first and a second ferrite member butted and bonded together to form an annular, closed magnetic path around a coil-winding groove, and a coil attached to a coil-winding portion of the first ferrite member. The first and second ferrite members provide a sliding surface to which a magnetic recording medium is opposed, and which extends across the first and second ferrite members. A non-magnetic material is secured to at least one of an inner surface and an outer surface of the coil-winding portion. The non-magnetic material is located below the sliding surface, and is spaced apart from the magnetic recording medium with the sliding surface disposed between the non-magnetic material and the magnetic recording medium.

Magnetic head core having ferrite member reinforced by non-magnetic

A ceramic-metal friction welded member includes a ceramic member formed with an annular notch in an outer circumference of its surface and a metal member joined onto the annular notch of the ceramic member by friction welding. A ceramic cast-in bonded piston includes a crown made of a ceramic material having an annular notch formed in an outer circumference of its surface, a metal annular member joined onto the annular notch of the crown by friction welding, and a piston main body made of an aluminum alloy surrounding the crown by cast-in bonding. A ceramic cast-in bonded piston includes a crown made of a ceramic material, a piston main body made of an aluminum alloy surrounding the crown by cast-in bonding, and an annular member made of a metal different from aluminum and joined by friction welding to an outer circumference of a surface of the crown in contact with the piston main body.

Growing community of inventors

Yokkaichi, Japan

Tomio Suzuki