Patents by Inventor Charles C. Lin
Charles C. Lin 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: 7978441Abstract: CPP magnetic read head designs have been improved by increasing the length of the AFM layer relative to that of both the free and spacer layers. The length of the pinned layer is also increased, but by a lesser amount, an abutting conductive layer being inserted to fill the remaining space over the AFM layer. The extended pinned layer increases the probability of spin interaction while the added conducting layer serves to divert sensor current away from the bottom magnetic shield which now is no longer needed for use as a lead.Type: GrantFiled: May 19, 2008Date of Patent: July 12, 2011Assignee: Headway Technologies, Inc.Inventors: Charles C. Lin, Min Li
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Patent number: 7919139Abstract: CPP magnetic read head designs have been improved by increasing the length of the AFM layer relative to that of both the free and spacer layers. The length of the pinned layer is also increased, but by a lesser amount, an abutting conductive layer being inserted to fill the remaining space over the AFM layer. The extended pinned layer increases the probability of spin interaction while the added conducting layer serves to divert sensor current away from the bottom magnetic shield which now is no longer needed for use as a lead.Type: GrantFiled: May 19, 2008Date of Patent: April 5, 2011Assignee: Headway Technologies, Inc.Inventors: Charles C. Lin, Min Li
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Publication number: 20080220156Abstract: CPP magnetic read head designs have been improved by increasing the length of the AFM layer relative to that of both the free and spacer layers. The length of the pinned layer is also increased, but by a lesser amount, an abutting conductive layer being inserted to fill the remaining space over the AFM layer. The extended pinned layer increases the probability of spin interaction while the added conducting layer serves to divert sensor current away from the bottom magnetic shield which now is no longer needed for use as a lead.Type: ApplicationFiled: May 19, 2008Publication date: September 11, 2008Inventors: Charles C. Lin, Min Li
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Publication number: 20080218911Abstract: CPP magnetic read head designs have been improved by increasing the length of the AFM layer relative to that of both the free and spacer layers. The length of the pinned layer is also increased, but by a lesser amount, an abutting conductive layer being inserted to fill the remaining space over the AFM layer. The extended pinned layer increases the probability of spin interaction while the added conducting layer serves to divert sensor current away from the bottom magnetic shield which now is no longer needed for use as a lead.Type: ApplicationFiled: May 19, 2008Publication date: September 11, 2008Inventors: Charles C. Lin, Min Li
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Patent number: 7382589Abstract: CPP magnetic read head designs have been improved by increasing the length of the AFM layer relative to that of both the free and spacer layers. The length of the pinned layer is also increased, but by a lesser amount, an abutting conductive layer being inserted to fill the remaining space over the AFM layer. The extended pinned layer increases the probability of spin interaction while the added conducting layer serves to divert sensor current away from the bottom magnetic shield which now is no longer needed for use as a lead.Type: GrantFiled: November 18, 2004Date of Patent: June 3, 2008Assignee: Headway Technologies, Inc.Inventors: Charles C. Lin, Min Li
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Patent number: 7170720Abstract: It is known that the magnetic shields, between which CPP GMR stacks are sandwiched, can be a source of AMR (anisotropic magneto-resistance) noise. This has been significantly reduced by coating both the magnetic shields with highly conductive layers. If the guidelines disclosed in the invention are followed, the read head can exhibit AMR noise reduced by about 14 to 20. Additionally, the total thickness of the read gap can be maintained to be as low as 300 to 400 Angstroms.Type: GrantFiled: August 28, 2003Date of Patent: January 30, 2007Assignee: Headway Technologies, Inc.Inventors: Charles C. Lin, Min Li, Simon Liao
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Patent number: 7072151Abstract: A method for forming a top spin-valve SyAP GMR read sensor having a novel conductive lead overlay configuration and the sensor so formed. The lead overlay electrically contacts the sensor at a position within the SyAP pinned layer, thus simultaneously assuring improved electrical contact and destroying the GMR properties of the sensor at the junction to improve the definition of the sensor track width.Type: GrantFiled: February 19, 2004Date of Patent: July 4, 2006Assignee: Headway Technologies, Inc.Inventors: Charles C. Lin, Cheng T. Horng, Min Li, Kochan Ju
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Patent number: 6821717Abstract: As the recording density of magnetic disk drives approaches 100 Gbits/in2, write track lengths of about 0.10 microns will be required. This cannot be accomplished using conventional photolithography. The present invention solves this problem by first forming on the bottom pole of the write head a cavity in a layer of photoresist, using conventional means. A seed layer of non-magnetic material is electrolessly laid down, following which a second layer of photoresist is deposited and patterned to form a second cavity that symmetrically surrounds the first one, thereby forming a mold around it. Ferromagnetic metal is then electro-deposited in this mold to form the top magnetic pole. Following the removal of all photoresist and a brief selective etch of the bottom pole, an extremely narrow write head is obtained.Type: GrantFiled: August 2, 2002Date of Patent: November 23, 2004Assignee: Headway Technologies, Inc.Inventors: Charles C. Lin, Kochan Ju, Jeiwei Chang
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Publication number: 20040160709Abstract: A method for forming a top spin-valve SyAP GMR read sensor having a novel conductive lead overlay configuration and the sensor so formed. The lead overlay electrically contacts the sensor at a position within the SyAP pinned layer, thus simultaneously assuring improved electrical contact and destroying the GMR properties of the sensor at the junction to improve the definition of the sensor track width.Type: ApplicationFiled: February 19, 2004Publication date: August 19, 2004Applicant: HEADWAY TECHNOLOGIES, INC.Inventors: Charles C. Lin, Cheng T. Horng, Min Li, Kochan Ju
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Patent number: 6729014Abstract: A method for forming a top spin-valve SyAP GMR read sensor having a novel conductive lead overlay configuration and the sensor so formed. The lead overlay electrically contacts the sensor at a position within the SyAP pinned layer, thus simultaneously assuring improved electrical contact and destroying the GMR properties of the sensor at the junction to improve the definition of the sensor track width.Type: GrantFiled: September 17, 2001Date of Patent: May 4, 2004Assignee: Headway Technologies, Inc.Inventors: Charles C. Lin, Cheng T. Horng, Min Li, Kochan Ju
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Publication number: 20040020778Abstract: As the recording density of magnetic disk drives approaches 100 Gbits/in2, write track lengths of about 0.10 microns will be required. This cannot be accomplished using conventional photolithography. The present invention solves this problem by first forming on the bottom pole of the write head a cavity in a layer of photoresist, using conventional means. A seed layer of non-magnetic material is electrolessly laid down, following which a second layer of photoresist is deposited and patterned to form a second cavity that symmetrically surrounds the first one, thereby forming a mold around it. Ferromagnetic metal is then electro-deposited in this mold to form the top magnetic pole. Following the removal of all photoresist and a brief selective etch of the bottom pole, an extremely narrow write head is obtained.Type: ApplicationFiled: August 2, 2002Publication date: February 5, 2004Applicant: Headway Technologies, Inc.Inventors: Charles C. Lin, Kochan Ju, Jeiwei Chang
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Publication number: 20020154458Abstract: A method for forming a top spin-valve SyAP GMR read sensor having a novel conductive lead overlay configuration and the sensor so formed. The lead overlay electrically contacts the sensor at a position within the SyAP pinned layer, thus simultaneously assuring improved electrical contact and destroying the GMR properties of the sensor at the junction to improve the definition of the sensor track width.Type: ApplicationFiled: September 17, 2001Publication date: October 24, 2002Applicant: Headway Technologies, Inc.Inventors: Charles C. Lin, Cheng T. Horng, Min Li, Kochan Ju
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Patent number: 5635037Abstract: A magnetic recording medium controllably textured by performing sputter etching or reactive ion etching either on the surface of a smooth substrate, which can be nickel-phosphorous/aluminum-magnesium (Al--Mg) substrate, or on the surface of a protective layer, such as a carbon overcoat. Both types of etching processes described above are carried out in a sputtering apparatus and have an etching mask of discrete hemi-spherical structures formed by the agglomeration of a low melting point metal or alloy such as indium or Pb--Sn, which has been deposited on a non-wetting surface such as the oxidized surface of NiP layer or the protective carbon overcoat prior to etching. The morphology of the textured surface can be controlled by adjusting the average thickness of the deposited masking materials, the gas composition, as well as the base pressure during etching.Type: GrantFiled: August 2, 1993Date of Patent: June 3, 1997Assignee: Industrial Technology Research InstituteInventors: Jau-Jier Chu, Chung-Yu Ting, Oliver J. Horng, Jye-Yen Cheng, Charles C. Lin, Mei-Rurng Tseng