Patents by Inventor Yohtaroh Ichimura
Yohtaroh Ichimura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7739785Abstract: Embodiments of the present invention provide a head gimbal assembly manufacturing method which can attach another magnetic head slider to a suspension to be reused without addition of solder. According to one embodiment of the present invention, a head gimbal assembly (HGA) is attached to a jig. Both sides of a portion close to the rear end of a magnetic head slider are gripped with hot tweezers heated at about 200° C. They are heated for about four seconds while applying force in a direction of peeling off the magnetic head slider from gimbals, thus removing the magnetic head slider from the gimbals. When another magnetic head slider is attached to the suspension, an adhesive adhered to the gimbals is removed and another adhesive is applied to the gimbals. The back of another magnetic head slider is pressed to the adhesive, whereby the magnetic head slider is fixed to the gimbals. Next, the solder fillet left on the gimbals is irradiated with laser beams to be melted and joined to an electric terminal.Type: GrantFiled: June 26, 2007Date of Patent: June 22, 2010Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Kenjirou Watanabe, Yoshio Uematsu, Yousuke Fukumoto, Yohtaroh Ichimura
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Patent number: 7719796Abstract: In a dynamic electric test, a head slider is to be fixed positively to a suspension and to be removable easily from the suspension in accordance with the result of the test. In one embodiment of the present invention a head gimbal assembly includes a head slider, a gimbal and a load beam. The head slider is disposed on a gimbal tongue and is held with an urging force of a resilient clamp at a position between the resilient clamp formed on the leading side of the head slider and connecting terminals formed on the opposite side thereof.Type: GrantFiled: June 30, 2006Date of Patent: May 18, 2010Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Haruhide Takahashi, Kousaku Wakatsuki, Shinobu Hagiya, Takayoshi Ohtsu, Kouji Kataoka, Yohtaroh Ichimura
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Patent number: 7574046Abstract: Embodiments of the invention provide a method for setting a light source parameter in order to recognize an identification mark on an object surface. In one embodiment, a grayscale image is generated by setting the light volume of the light source to a given value. Plural thresholds each for binarizing the grayscale image in density are set. The inter-class variance values to be produced respectively according to the thresholds are calculated and the largest inter-class variance value is selected as the peak inter-class variance value from the inter-class variance values calculated. The light volume is changed to a plurality of different values. Peak inter-class variance values are obtained respectively for the values and the largest peak inter-class variance value is selected as the maximum inter-class variance value from the peak inter-class variance values obtained.Type: GrantFiled: December 15, 2005Date of Patent: August 11, 2009Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Yohtaroh Ichimura, Shinichi Iwasa, Takayuki Erikawa, Yukihiro Nakamura
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Patent number: 7550695Abstract: Embodiments of the invention correct the static attitude of a head gimbal assembly (HGA) with high accuracy. In one embodiment, a vector group that constitutes the shortest path from the initial attitude of the HGA to the final anticipatory attitude is formed. The vector group is formed of the plural displacement vectors that give a variety of variations in static attitude when unit shots of laser light are performed on the HGA. Displacement vectors are synthesized while the displacement vectors each giving the anticipatory attitude closest to a target attitude are being selected in order from the initial attitude, toward the target attitude. Unit shots equivalent to the number of displacement vectors are performed on irradiating positions related to the displacement vectors included in the vector group. The static attitude existing after the unit shots is measured, then the displacement vectors are corrected, and a vector group constituting the new shortest path is formed.Type: GrantFiled: September 15, 2005Date of Patent: June 23, 2009Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Yohtaroh Ichimura, Kohichiroh Naka, Yoshio Uematsu, Tatsushi Yoshida
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Publication number: 20080092365Abstract: Embodiments of the present invention provide a head gimbal assembly manufacturing method which can attach another magnetic head slider to a suspension to be reused without addition of solder. According to one embodiment of the present invention, a head gimbal assembly (HGA) is attached to a jig. Both sides of a portion close to the rear end of a magnetic head slider are gripped with hot tweezers heated at about 200° C. They are heated for about four seconds while applying force in a direction of peeling off the magnetic head slider from gimbals, thus removing the magnetic head slider from the gimbals. When another magnetic head slider is attached to the suspension, an adhesive adhered to the gimbals is removed and another adhesive is applied to the gimbals. The back of another magnetic head slider is pressed to the adhesive, whereby the magnetic head slider is fixed to the gimbals. Next, the solder fillet left on the gimbals is irradiated with laser beams to be melted and joined to an electric terminal.Type: ApplicationFiled: June 26, 2007Publication date: April 24, 2008Applicant: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Kenjirou Watanabe, Yoshio Uematsu, Yousuke Fukumoto, Yohtaroh Ichimura
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Publication number: 20070002494Abstract: In a dynamic electric test, a head slider is to be fixed positively to a suspension and to be removable easily from the suspension in accordance with the result of the test. In one embodiment of the present invention a head gimbal assembly includes a head slider, a gimbal and a load beam. The head slider is disposed on a gimbal tongue and is held with an urging force of a resilient clamp at a position between the resilient clamp formed on the leading side of the head slider and connecting terminals formed on the opposite side thereof.Type: ApplicationFiled: June 30, 2006Publication date: January 4, 2007Applicant: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Haruhide Takahashi, Kousaku Wakatsuki, Shinobu Hagiya, Takayoshi Ohtsu, Kouji Kataoka, Yohtaroh Ichimura
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Publication number: 20060126934Abstract: Embodiments of the invention provide a method for setting a light source parameter in order to recognize an identification mark on an object surface. In one embodiment, a grayscale image is generated by setting the light volume of the light source to a given value. Plural thresholds each for binarizing the grayscale image in density are set. The inter-class variance values to be produced respectively according to the thresholds are calculated and the largest inter-class variance value is selected as the peak inter-class variance value from the inter-class variance values calculated. The light volume is changed to a plurality of different values. Peak inter-class variance values are obtained respectively for the values and the largest peak inter-class variance value is selected as the maximum inter-class variance value from the peak inter-class variance values obtained.Type: ApplicationFiled: December 15, 2005Publication date: June 15, 2006Applicant: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Yohtaroh Ichimura, Shinichi Iwasa, Takayuki Erikawa, Yukihiro Nakamura
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Publication number: 20060053621Abstract: Embodiments of the invention correct the static attitude of a head gimbal assembly (HGA) with high accuracy. In one embodiment, a vector group that constitutes the shortest path from the initial attitude of the HGA to the final anticipatory attitude is formed. The vector group is formed of the plural displacement vectors that give a variety of variations in static attitude when unit shots of laser light are performed on the HGA. Displacement vectors are synthesized while the displacement vectors each giving the anticipatory attitude closest to a target attitude are being selected in order from the initial attitude, toward the target attitude. Unit shots equivalent to the number of displacement vectors are performed on irradiating positions related to the displacement vectors included in the vector group. The static attitude existing after the unit shots is measured, then the displacement vectors are corrected, and a vector group constituting the new shortest path is formed.Type: ApplicationFiled: September 15, 2005Publication date: March 16, 2006Applicant: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Yohtaroh Ichimura, Kohichiroh Naka, Yoshio Uematsu, Tatsushi Yoshida
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Patent number: 6676005Abstract: The present invention enhances the reliability of wire-bonding strength by reducing a variation in the entire transformation amount of a wire. At point P1, a bonding wedge 21 abuts the wire 71, whereby a load is exerted on the wire 71. The wire 71 transforms by an amount of transformation A, and the transformation stops at point P2. The transformation amount A varies greatly. At point P3 (T1), ultrasonic wave vibration is exerted and the transformation of the wire 71 is restarted. At this stage, a variation in the transformation amount A is absorbed by an amount of transformation B and therefore a variation in the transformation amount A+B becomes small. At point P4 (T1+T2), the transformation amount A+B is maintained substantially constant. At this point P4, the transformation amount of the wire 71 is set to 0 and the measurement of the transformation amount of the wire 71 is started.Type: GrantFiled: July 17, 2002Date of Patent: January 13, 2004Assignee: International Business Machines CorporationInventors: Kenji Itoh, Naoki Kurosu, Yohtaroh Ichimura, Tatsushi Yoshida
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Patent number: 6530613Abstract: An air tweezer capable of efficiently performing an operation in which an article with a very small size, such as a pico slider or a femto slider, is sucked and set at a predetermined position of a suspension, and having countermeasures against ESD.Type: GrantFiled: February 22, 2001Date of Patent: March 11, 2003Assignee: International Business Machines CorporationInventors: Yoshio Uematsu, Yohtaroh Ichimura, Tatsumi Tsuchiya, Tasushi Yoshida
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Publication number: 20030010806Abstract: The present invention enhances the reliability of wire-bonding strength by reducing a variation in the entire transformation amount of a wire. At point P1, a bonding wedge 21 abuts the wire 71, whereby a load is exerted on the wire 71. The wire 71 transforms by an amount of transformation A, and the transformation stops at point P2. The transformation amount A varies greatly. At point P3 (T1), ultrasonic wave vibration is exerted and the transformation of the wire 71 is restarted. At this stage, a variation in the transformation amount A is absorbed by an amount of transformation B and therefore a variation in the transformation amount A+B becomes small. At point P4 (T1+T2), the transformation amount A+B is maintained substantially constant. At this point P4, the transformation amount of the wire 71 is set to 0 and the measurement of the transformation amount of the wire 71 is started.Type: ApplicationFiled: July 17, 2002Publication date: January 16, 2003Inventors: Kenji Itoh, Naoki Kurosu, Yohtaroh Ichimura, Tatsushi Yoshida
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Patent number: 6355122Abstract: A set of bonding pads are ultrasonically connected to a set of leads. The bonding pads are formed on a predetermined plane of a slider held by a slider holder accessible to the recording plane of a disk in a disk drive. The leads are held by the slider holder and have joints that are formed so as to respectively face each of the bonding pads. A front end plane of a wedge working on the joints is tilted in a direction in which the first sides of the joints correspond to external connection sides. The ultrasonic connection is completed by pressing the joints of the leads against the faced boding pads.Type: GrantFiled: June 22, 2000Date of Patent: March 12, 2002Assignee: International Business Machines CorporationInventors: Kenji Itoh, Naoki Kurosu, Yohtaroh Ichimura, Tatsushi Yoshida
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Publication number: 20010015562Abstract: An air tweezer capable of efficiently performing an operation in which an article with a very small size, such as a pico slider or a femto slider, is sucked and set at a predetermined position of a suspension, and having countermeasures against ESD.Type: ApplicationFiled: February 22, 2001Publication date: August 23, 2001Applicant: International Business Machines CorporationInventors: Yoshio Uematsu, Yohtaroh Ichimura, Tatsumi Tsuchiya, Tasushi Yoshida