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    • 3. 发明专利
    • UNIFORMING DEVICE FOR RADIANT LIGHT INTENSITY
    • JPS62206519A
    • 1987-09-11
    • JP4835586
    • 1986-03-07
    • HITACHI LTD
    • TSUMAKI KOJINISHI MASATSUGU
    • H05H13/04G02B27/00G03F7/20H01L21/027
    • PURPOSE:To uniform the intensity of radiant light and extend the irradiated area by changing the reflection angle of a mirror from a bell-shaped distribution to a uniform rectangular distribution to uniform the intensity of the radiant light in an optical system where said mirror is provided between a light emitting point and an irradiated point and the light of right and left trailing parts of the distribution is condensed inward. CONSTITUTION:For the purpose of changing the intensity distribution shown by a solid line in a figure A to that shown in a figure B, the light from a point A as the boundary, where the intensity of radiant light is reduced to a half, to a point b1 is reflected by a mirror 1 to compensate the intensity of light from the point A to a point b2. The similar operation is performed for the light between points c2 and c1 to extend the range, where the intensity of light is uniform, from an area between points b2 and c2 to that between points A and C. With respect to positional relations among a light source 2, the mirror 1, and a wafer 3, the reflection angle of the mirror is denoted as alpha and the angle for a radiant light intensity Ia1 and that for a radiant light intensity Ia2 are denoted as theta and theta-alpha respectively. When a point a1 is moved from the point 1 to the point A, the reflection angle alpha of the mirror in each position is determined in accordance with this movement. Thus, the intensity of the radiant light whose intensity distribution including right and left trailing parts is not uniform is made uniform to obtain a radiant light intensity uniforming device which extends the irradiates area.
    • 5. 发明专利
    • POSITION MONITOR
    • JPH01193684A
    • 1989-08-03
    • JP1697888
    • 1988-01-29
    • HITACHI LTD
    • TSUMAKI KOJI
    • G01T1/29G21K5/04
    • PURPOSE:To accurately measure the position of ion beam, by allowing heavy ion beam to pass through a membrane and measuring the intensity distribution of ion beam excited at that time. CONSTITUTION:A carbon membrane 1 having a thickness of several 1mum is arranged to the region permitting heavy ion beam 9 to pass in the vacuum chamber 8 of a heavy ion accelerator. The beam 9 performs interaction along with the membrane 1 to excite a bound electron. The excited electron passes through the membrane 1 to emit light and returns to a ground state. This beam is condensed by a lens 2 to be formed into an image on a multichannel beam sensor 3. The sensor 3 measures a photon one at a time to measure the intensity distribution of beam. The beam is converted to an electric signal in the sensor 3 and the converted signal is amplified by an amplifier 5 and shaped in a waveform to be sent to a display apparatus 7 and a signal memory 6. The intensity distribution waveform of beam is obtained on the display apparatus 7 and, since this distribution of beam corresponds to that of the beam 9, the position of the beam 9 can be accurately measured.
    • 10. 发明专利
    • ELECTROMAGNET
    • JPH0729728A
    • 1995-01-31
    • JP16817793
    • 1993-07-07
    • HITACHI LTD
    • YANAGI YOSHIHIKOKAKIUCHI SHUNJITSUMAKI KOJISAKURAHATA HIROAKIWATABIKI MASAYUKI
    • H01F7/06H05H7/04
    • PURPOSE:To provide an electromagnet which can keep the intensity of a magnetic field in a proportional relation with that of a current on a high magnetomotive force side without enlarging an iron core in size. CONSTITUTION:An electromagnet is composed of a pair of magnetic poles 100 possessed of an inter-magnetic pole gap 4 and an air layer gap 5 inside, a coil 3 which is provided in the inter-magnetic pole gap 4 and generates a magnetic field when a current flows through it, and an elastic member 20 which is so provided to a part of the air layer gap 5 as to control the gap 5 in width corresponding to a magnetic force which acts on the gap 5. By this setup, a magnetic material can be restrained from increasing in magnetic resistance on a high magnetomotive force side without enlarging a magnetic pole in area. Therefore, an electromagnet, which can keep the intensity of a magnetic field in a proportional relation with that of a current from a low magnetomotive force side (low coil current) to a high magnetomotive force side (high coil current) without enlarging it in size, can be realized.