Tdk Corporation

Disco Corporation

Teijin Limited

Tsutomu Maeda

Takayuki Kanno

Kiyoshi Matsui

Norihiro Yamada

Isao Yokoyama

Kunihiro Sato

Sumio Takahashi

Yoshiaki Azuma

Seiji Watabe

Yoshifumi Harada

Tomohiro Ohta

Satoshi Genda

Masanori Sasaki

Michio Ishikawa

Kiyoshi Ohsuga

Koichi Shibuya

Yotaro Toyoshima

Yasushi Iwata

A laser processing apparatus has a control unit including an inspection modified layer former detecting a provisional orientation flat of a bare wafer and applying a laser beam of a predetermined output power level to the bare wafer depending on the direction of the provisional orientation flat thereby to form a modified layer for detecting the crystal orientation closely to an outer edge of the bare wafer, and a crack detector detecting a crack extending from the modified layer toward a Y-axis and an exposed surface of the bare wafer, providing the modified layer extends along an X-axis in an image captured of the modified layer. If the crack detector detects no crack, the control unit determines the modified layer with no crack extending therefrom as extending parallel to the crystal orientation of the bare wafer.

Laser processing apparatus

A controller of a laser processing apparatus includes: a storage section that stores processing conditions for forming modified layers along division lines of a wafer; and a processing line calculation section that displays a position at which the modified layer is planned to be formed and which is stored as the processing condition, on a display panel as a processing line. The processing line calculation section displays the processing line on the display panel superimposed on a first division line, in a region in which a start point or end point of the first division line is connected to a second division line. A start point or end point of a first modified layer formed along the first division line is permitted to be re-set on the display panel so as not to interfere with a second modified layer formed along the second division line.

A laser processing apparatus is provided wherein a laser beam of a wavelength which passes through a wafer having a surface on which a plurality of devices are disposed is irradiated along a schedule division line to separate the adjacent devices from each other to form a modification layer which continuously extends in a given length in the inside of the wafer. A mark portion is displayed in an overlapping relationship with a picked up image obtained by image pickup of a wafer on a display unit. If the mark portion is moved to a desired position of the picked up image displayed on the display unit, then coordinates which correspond to the desired position of the picked up image are stored as a start point or an end portion of a scheduled division line, along which the modification layer is to be formed, into a storage unit.

A wafer processing method includes a wafer unit forming step of supporting a wafer through an adhesive tape to an annular frame to thereby form a wafer unit, a wafer unit holding step of holding the wafer through the adhesive tape on a holding surface of a chuck table under suction, a processing step of applying a laser beam to the wafer held on the chuck table to thereby form a modified layer inside the wafer, an unloading step of unloading the wafer unit from the chuck table, and a dividing step of dividing the wafer along the modified layer as a division start point. The wafer processing method further includes a close contact canceling step of blowing a fluid from the holding surface against the adhesive tape after performing the processing step to thereby cancel the close contact between the adhesive tape and the holding surface.

Wafer processing method

A method enabling a destroyed part of a joint or joint cartilage to be extracted accurately and at a high speed with a good repeatability and enabling quantitative and simple 3D analysis of the joint and the destroyed part, that is, a method of 3D image processing comprising filling in a medullary cavity region, comprised of a hollow region inside a joint, of a digitalized image of a cross-section of the examined joint using the Expansion and Shrinkage method, performing 3D labeling by a 3D image obtained by stacking digitalized images of cross-sections of the examined joint generated at a step of extracting a contour of the cross-sectional image of the joint or digitalized images of cross-sections of the examined joint not pre-processed, and defining the joint image to be evaluated.

Three-dimensional joint structure measuring method

This invention relates to a bone measurement method for measuring a bone shape, structure and architecture on the basis of the tomographic images of a test bone or joint, in more detail, to a bone measurement method characterized by having a template image extraction step for obtaining a wholly continued template image of a bone inner portion surrounded by a cortical bone from the binary image of a test bone cross section, and separating a cortical bone and a cancellous bone by the product of said template image and said binary image, as a bone measurement method which enables the automatic, high-speed and repeatable separation of a cortical bone and a cancellous bone on the basis of the binary image of a test bone or joint cross section and by which a separated three-dimensional image of the cortical bone portion and the cancellous bone portion is obtained as the bases for a non-invasive analyses of three-dimensional bone structure, bone strength, and the like.

Bone measuring method

A high voltage generating circuit which includes a switching circuit for switching a DC input, a fly-back transformer whose input coil is driven by pulses delivered from the switching actuation of the switching actuation of the circuit, a rectifier circuit for rectifying the fly-back voltage generated in the output coil of the fly-back transformer, a capacitor for smoothing the rectified output, and a voltage stabilizing circuit. A diode is electrically connected to one terminal of the output coil of the fly-back transformer on the low-voltage side thereof as compared with the ground, the diode being so determined as to position in the forward direction to the direction of rectification. The voltage stabilizing circuit is formed by a voltage sensing circuit for sensing a DC high voltage output, comparing it with a reference voltage applied from a reference voltage source and generating an output of a result of comparison and a control circuit connected between the anode of the diode and the ground terminal. The control circuit is formed of a plurality of transistors including transistors controlled in response to the output from the voltage sensing circuit and a protective circuit for each of the transistors.

High voltage supply having a voltage stabilizer

A discharge load driving circuit has a transformer with a low voltage coil and a high voltage coil wound around a magnetic core. The high voltage coil has a transformation ratio for setting a high self-resonance frequency value for the transformer to thereby output high voltage at a short rise time period. The discharge load driving circuit further includes a switching element connected to the transformer for switching on and off a d-c input supplied thereto through the low voltage coil of the transformer. The discharge load driving circuit further includes a driver circuit for driving a switching element driving pulse, a control circuit for controlling the driver circuit, a discharge load connected to the high voltage coil for discharging load by a high voltage output generated in the high voltage coil when the switching element is turned on, and a detector for detecting a flow of discharge current in the discharge load. The switching element repeats its on-off action in a predetermined. For supplying a required amount of discharge energy to the discharged load until self-propagation of a flame subsequent to generation of a flame nucleus by a spark discharge of the discharge load.

Regulated forward converter for generating repeating spark discharge

In a transformer including a low-voltage input coil, a high-voltage output coil disposed coaxially of the low-voltage input coil, and a core for magnetically connecting both of the coils together; the improvement comprising a first bobbin around which the low-voltage input coil is wound which first bobbin has an inner-diameter hole, wherein the core comprises a rod portion to be inserted into the inner-diameter hole of the first bobbin and a flange portion provided at one axial end of the rod portion. In another aspect of the invention, the transformer further comprises a second bobbin around which the high-voltage output coil is wound, and a connector adapted to be connected to an ignition plug which connector is mounted on an end surface of the second bobbin on the opposite side of the flange portion of the core in such a manner that a mounting direction of the connector substantially coincides with an axial direction of the second bobbin. In a further aspect of the invention, the transformer further comprises a shield case formed of a magnetic conductive material surrounding an outer periphery of the connector or entirely surrounding the transformer. The rod portion of the core may have a tapering cross section such that it is gradually tapered from a low voltage side of the high-voltage output coil to a high voltage side thereof. With this arrangement, the transformer may be easily assembled and made compact. Further, a magnetic efficiency may be improved, and an insulating distance between the low-voltage input coil and the high-voltage output coil may be ensured.

Transformer with tapered core

A deflection apparatus for cathode ray tube is provided, which comprises deflection yoke with guide grooves, deflection windings for scanning in one direction in said grooves, deflection windings for scanning in the other direction and an insulator between both types of windings. It attains high accuracy deflection with less distortion without any induced heating problem due to protuberances made relatively between grooves.

Deflection apparatus for cathode ray tube

An electromagnetic deflection-distortion corrector comprises a plurality of permanent magnets arranged around the tubular wall of a CRT display unit of the electromagnetic deflection type, and adjuster means for moving each permanent magnet forward and backward, toward and away from the CRT wall, while at the same time rotating the direction of its magnetization.

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Tokyo, Japan

Tsutomu Maeda