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31. 发明专利

JPS5933618A Detecting system of track position shift 失效
标题翻译：轨迹位移检测系统
公开(公告)号：JPS5933618A
公开(公告)日：1984-02-23
申请号：JP14106082
申请日：1982-08-16
申请人： Hitachi Ltd
发明人： KAWAKAMI HIROJI , KICHISE MITSUO
IPC分类号： G11B5/596 , G11B5/58 , G11B21/10
CPC分类号： G11B21/10
摘要： PURPOSE:To detect the position shift of a reproducing head, by decreasing the gap width of a reproducing head less than the track width and providing the position shift detecting heads at both sides of the track width direction to detect the presence or absence of correlation of the reproduced signal given from the detecting head. CONSTITUTION:The reproducing head given from a reproducing head 9 is multiplied by the reproducing signal given from a position shift detecting head 10 to obtain a product signal. At the same time, a product signal is obtained by multiplying the reproducing signal from the head 9 and the reproducing signal from a position shift detecting head 11. These product signals are integrated by an integration circuit having a time constant large enough to the cycle of a data signal. Each signal obtained from the integration circuit varies in response to the correlation of two reproducing signals having amplitudes multiplied by each other. Then the position shift can be detected for a track 7 of the head 9 by comparing the amplitudes of output signals given from each integration circuit.
摘要翻译：目的：为了检测再现头的位置偏移，通过减小再现头的间隙宽度小于轨道宽度，并在轨道宽度方向的两侧提供位置偏移检测头，以检测是否存在相关性从检测头给出的再生信号。构成：从再现头9给出的再现头乘以从位置偏移检测头10给出的再现信号，以获得乘积信号。同时，通过将来自头部9的再现信号和来自位置检测头11的再现信号相乘来获得乘积信号。这些乘积信号由积分电路积分，该积分电路的时间常数足够大，数据信号。从积分电路获得的每个信号响应于具有彼此相乘的幅度的两个再现信号的相关性而变化。然后，通过比较从每个积分电路给出的输出信号的幅度，可以检测头部9的轨道7的位置偏移。

32. 发明专利

JPS5931404A Pressure sensor circuit 失效
标题翻译：压力传感器电路
公开(公告)号：JPS5931404A
公开(公告)日：1984-02-20
申请号：JP14106782
申请日：1982-08-16
申请人： Hitachi Ltd
发明人： YAMADA KAZUJI , SATOU HIDEO , KATOU KAZUO , KAWAKAMI HIROJI , KANZAWA RIYOUSAKU , SASAYAMA TAKAO
IPC分类号： G01L9/04 , G01B7/16 , G01L9/00 , G01L9/06 , G01D3/04
CPC分类号： G01L9/0054 , G01L9/065 , Y10S323/907
摘要： PURPOSE:To perform precise temperature compensation regardless of the fluctuation of a source voltage, by using a constant current souce proportional to the absolute temperature, a constant current souce immue from the influence of temperature, and a constant current source proportional to the temperature characteristic of a gauge resistance. CONSTITUTION:The circuit consisting of transistors (TR) Q1 and Q2, resistances R3 and R4 whose temperature coefficients are nearly zero, and a constant current source 19 is used frequently as a constant current souce in general in the form of an integrated circuit. This circuit supplies a current IT proportional to absolute temperature T and a current IC which does not depend upon the temperature. The circuit consisting of a TRQ3, constant current source 20, amplifier 21, resistance R5 which is almost under no influence of temperature, and resistance R6 whose is nearly equal to a diffused resistance constituting a bridge 22 generates a constant current IR (SINK) nearly equal to the temperature coefficient of the gauge resistance. Then, a current IT+IC-IR is supplied to the bridge 22 by those circuits.
摘要翻译：目的：通过使用与绝对温度成比例的恒定电流来执行精确的温度补偿，无论电源电压是否波动，恒温电流均来自温度的影响，恒定电流源与温度特性成正比表阻。构成：通常以集成电路的形式，将晶体管（TR）Q1和Q2，温度系数接近零的电阻R3和R4以及恒定电流源19频繁地用作恒定电流源的电路。该电路提供与绝对温度T成比例的电流IT和不依赖于温度的电流IC。由TRQ3，恒流源20，放大器21，几乎不受温度影响的电阻R5和几乎等于构成桥22的扩散电阻的电阻R6组成的电路产生近似于恒定电流IR（SINK）等于表面电阻的温度系数。然后，这些电路向桥接器22提供电流IT + IC-IR。

33. 发明专利

JPS5877015A PRODUCTION OF THIN FILM MAGNETIC HEAD 失效
公开(公告)号：JPS5877015A
公开(公告)日：1983-05-10
申请号：JP17302781
申请日：1981-10-30
申请人： HITACHI LTD
发明人： OCHIAI YUUJI , TSUJI GIICHI , HAGIWARA YOSHIKI , TAKESHITA KOUJI , KAWAKAMI HIROJI
IPC分类号： G11B5/187 , G11B5/23 , G11B5/31
摘要： PURPOSE:To improve the working accuracy for the polishing of a counter face to a magnetic plate of a block forming a thin film magnetic head element, by varying the resistance value in steps. CONSTITUTION:Plural vertical conductor films 14 which are rectangular to a working face are formed on a substrate 11 via an insulated film 12. The films 14 are connected to a resistor 13 at an area distance away from the working face, and at the same time two adjacent films 14 are connected to each other via a horizontal conductor film 14' formed with a different distance from the working face. If the working is started from the direction of an arrow mark, the film 14' is cut away in response to the progress of working. Then the resistance value is varied in steps in accordance with the cutting areas. The positional relation between the varying positions of resistance value of a conductor pattern and the gap depth is decided when the pattern is formed. As a result, the working depth, i.e., the gap depth can be known from the variation of the resistance value of a conductor pattern.

34. 发明专利

JPS5829117A MAGNETO-RESISTANCE EFFECT TYPE MAGNETIC HEAD AND ITS MANUFACTURE 失效
公开(公告)号：JPS5829117A
公开(公告)日：1983-02-21
申请号：JP12667781
申请日：1981-08-14
申请人： HITACHI LTD
发明人： TAKEURA TOORU , OOURA MASAKI , KAWAKAMI HIROJI
IPC分类号： G11B5/39
摘要： PURPOSE:To decrease the distortion in an output waveform, by making the thickness of a magnetic flux induction film thicker than that of a magneto- resistance effect element and arranging the magneto-resistance effect element in a groove of the magnetic flux induction film. CONSTITUTION:An insulating film 12 is deposited on a smooth substrate 11 by a method such as sputtering, a conductive ferromagnetic substance film 13 forming an MR element, e.g., a ''Permalloy '' film is deposited on the film 12 by the sputtering or vacuum deposition, and an insulation film 14 is deposited on the film 13 by a method such as sputtering. A photoresist 15 is coated on the three- layered film in the desired shape. The photoresist 15 formed into the desired shape is used as a mask to form the film 14 by a method such as reactive plasma etching, and the MR element 16 is formed in slightly smaller size than the film 14, with the film 13 forming the MR element through wet etching, by using etching liquid having selectivity to the films 12 and 14.

35. 发明专利

JPS5622912A ROTARY SENSOR 失效
公开(公告)号：JPS5622912A
公开(公告)日：1981-03-04
申请号：JP9807179
申请日：1979-08-02
申请人： HITACHI LTD
发明人： HAYASHIDA HIROSHI , TAKAHASHI TADASHI , MIYASHITA KUNIO , KAWAKAMI HIROJI
IPC分类号： G01D5/245
摘要： PURPOSE:To improve the resolution of a rotary sensor by forming detection parts of fixed pitches by bending a magnetic resistance element. CONSTITUTION:Substrate 4, holding the strength of a sensor, has magnetic resistance element 2 vapor-deposited. Element 2 is the part that detects information recorded on a recording medium and composed of lead-wire fitting parts R1 and R2 to which lead wires are soldered, detection parts R3, R5, R7 and R9 that detect magnetic flux, and gang parts R4, R6 and R8. Lead-wire fitting parts R1 and R2 should be wide in width. Further, detection parts R3, R5, R7 and R9 should be several tens mu in width because of the relation between sensitivity and current density. Arranging detection parts R3, R5, R7 and R9 at pitch one (n)-th recording wavelength lambda (n is >=2 integer) resistance variations of them put out of phase at pitch lambda/n, so that resolution (n) times the recording density can be obtained.

36. 发明专利

JPS55106331A PRESSURE SENSOR OF SEMICONDUCTOR STRAIN GAUGE 失效
公开(公告)号：JPS55106331A
公开(公告)日：1980-08-15
申请号：JP1321979
申请日：1979-02-09
申请人： HITACHI LTD
发明人： SUZUKI KIYOMITSU , NISHIHARA MOTOHISA , KOBORI SHIGEYUKI , SATOU HIDEO , YATSUNO KOUMEI , KAWAKAMI HIROJI , TAKAHASHI MINORU
IPC分类号： G01L9/04
摘要： PURPOSE:To increase the reliability of the pressure sensor by adhering the silicon diaphragm possessing two units of pressure-sensitive diaphragm rooms to the component featuring nearly the same heat expansion coefficient as the silicon diaphragm and then securing the vacuum state for one of the two diaphragm rooms along with the measured pressure introduced into the other room each. CONSTITUTION:The impurity such as the boron or the like is diffused to both sides of the upper surface of silicon diaphragm 1. Thus semiconductor strain gauges 8a and 8b are formed. Component 2 such as the pyrex glass or the like featuring nearly the same heat expansion coefficient as diaphragm 1 is adhered to the lower surface of diaphragm 1. And linkage hole 14 is provided to one pressure-sensitive diaphragm room 13b to secure the linkage to the inside of intake manifold of the engine; while the vacuum state is secured for the other diaphragm room 13b. Thus the measurement is given to both the atmospheric pressure and the pressure inside the manifold via gauges 8a and 8b.

37. 发明专利

JPS5552925A STANDARD TYPE PRESSURE SENSOR 失效
公开(公告)号：JPS5552925A
公开(公告)日：1980-04-17
申请号：JP12622878
申请日：1978-10-16
申请人： HITACHI LTD
发明人： SHIMADA SATOSHI , KAWAKAMI HIROJI , NISHIHARA MOTOHISA , SUZUKI KIYOMITSU , KOBORI SHIGEYUKI , SATOU HIDEO , TAKAHASHI MINORU , KANZAWA RIYOUSAKU
IPC分类号： G01L9/04 , G01L9/00 , H01L29/84
摘要： PURPOSE:To make the zero point compensation unnecessary by specifying the value of a diffusion resistor for lead-out. CONSTITUTION:Lead-out diffusion resistors 10, 12, 23, 34 and 40 made of boron are arranged on the upper side of a diaphragm 1 which is made of silicone and which is formed with a recess 15 for improving the sensitivity. Those resistors are equipped at their both ends with an electrode 13 and Al electrodes 100, 120, 230, 340 and 400 thereby to constitute strain gauges R1-R4. Moreover, a cap 2 of borosilicate having a standard pressure chamber 21 is electrostatically jointed to constitute a standard type pressure sensor. In this pressure sensor, the relationship of R>r'>r is made to hold, in which: R stands for the resistance of the strain gauges R1-R4; r' stands for the equivalent resistance of the diffusion resistors 12 and 23; and r stands for the equivalent resistance of the diffusion resistors 10 and 40. Thus, the output imbalance of the bridge is eliminated together with the influence upon the zero point thereby to make the zeropoint compensation unnecessary.

38. 发明专利

JPS5541832A LIQUID DROP INJECTION DEVICE 失效
公开(公告)号：JPS5541832A
公开(公告)日：1980-03-24
申请号：JP11449578
申请日：1978-09-20
申请人： HITACHI LTD
发明人： MATSUDA YASUMASA , KASAHARA MASATOSHI , NISHIHARA MOTOHISA , KAWAKAMI HIROJI , SAKAE MASAJI
IPC分类号： B05B1/02 , B05B17/04 , B05B17/06 , B06B1/06 , B41J2/045 , B41J2/055
摘要： PURPOSE:To drastically enhance the efficiency of liquid drop injection, the thickness of a piezoelectric element is reduced in a pulse jet type ink jet nozzle or the like. CONSTITUTION:In a liquid drop injection device, a piezoelectric element 13A bonded has a thickness which is below 1.8 times the thickness hp of a diaphragm. This is determined by the following consideration: when the piezoelectric element 13A is given the same strain, the volume change of the diaphragm chamber 3B becomes maximum when the piezoelectrid element 13A has the same thickness hp as that of the diaphragm; and as the thickness hp of the piezoelectric element becomes thin, the voltage can be reduced to provide the same strain. Thus, this construction of the device allows a low voltage pulse to provide a large change in volume of the diaphragm chamber 3B, and to enhance the efficiency of liquid drop injection. Further, a driving circuit in good productivity can be expected.

39. 发明专利

JPS5522125A PRESSURE SENSOR 失效
公开(公告)号：JPS5522125A
公开(公告)日：1980-02-16
申请号：JP9462078
申请日：1978-08-04
申请人： HITACHI LTD
发明人： SUZUKI KIYOMITSU , NISHIHARA MOTOHISA , KAWAKAMI HIROJI , YATSUNO KOUMEI , SATOU HIDEO , KOBORI SHIGEYUKI , TAKAHASHI MINORU
IPC分类号： G01L9/04 , G01L9/00
摘要： PURPOSE:To detect at least two absolute pressure levels with the use of one sensor by bringing the gas introducing side and vacuum space side of a pellet into contact with cover members having substantially the same thermal expansion coefficient as that of the pellet. CONSTITUTION:An absolute pressure sensor is composed a refractory glass plate 1, a pellet 2 made of a single crystal of semiconductor, a refractory glass pipe 3 and the like, which pipe 3 is fixedly connected to a pipe 5 made of metal or the like. A pressure-sensitive diaphragm chamber 19a is vented to the atmosphere through a hole, which is formed in the form of a groove in parallel with the upper side of the pipe 3, and through a hole 21 which is formed in the side wall of the pipe 5. Likewise, a chamber 19b introduces the pressure in the manifold of an engine through a through hole 22 extending at a right angle with respect to the hole 21 and through a hole 23 in the pipe 5. Strain gauges 25a and 25b, which are diffused in the pressure- sensitive diaphragms 9a and 9b of the pellet 2 have their resistances varied in accordance with the pressure to be introduced into the chambers 19a and 19b so that the bottomed hole 10 in the glass plate 1 can be held under vacuum. As a result, the atmospheric pressure and the absolute pressure in the manifold can be simultaneously detected by the variation in the resistance.

40. 发明专利

JPS549958A PRODUCTION FOR SPACING DEFINING FILM OF LIQUID CRYSTAL DIAPLY PANELS 失效
公开(公告)号：JPS549958A
公开(公告)日：1979-01-25
申请号：JP7436777
申请日：1977-06-24
申请人： HITACHI LTD
发明人： KAWAKAMI HIROJI
IPC分类号： G02F1/1339 , G02F1/13 , G09F9/00
摘要： PURPOSE:To form spacing defining films without causing damaging and contamination of orientation control films by fly-depositing minute droplets containing materials for forming the spacing defining films on required portion.

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