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Patent Application Titled "Magnetic Writer Having Multiple Gaps with More Uniform Magnetic Fields across the Gaps" Published Online

May 27, 2014



By a News Reporter-Staff News Editor at Information Technology Newsweekly -- According to news reporting originating from Washington, D.C., by VerticalNews journalists, a patent application by the inventors Biskeborn, Robert G. (Hollister, CA); Herget, Philipp (San Jose, CA); Webb, Bucknell C. (Ossining, NY), filed on January 9, 2014, was made available online on May 15, 2014.

The assignee for this patent application is International Business Machines Corporation.

Reporters obtained the following quote from the background information supplied by the inventors: "The present invention relates to data storage systems, and more particularly, this invention relates to magnetic write heads having multiple gaps.

"In magnetic storage systems, data is read from and written onto magnetic recording media utilizing magnetic transducers commonly. Data is written on the magnetic recording media by moving a magnetic recording transducer to a position over the media where the data is to be stored. The magnetic recording transducer then generates a magnetic field, which encodes the data into the magnetic media. Data is read from the media by similarly positioning the magnetic read transducer and then sensing the magnetic field of the magnetic media. Read and write operations may be independently synchronized with the movement of the media to ensure that the data can be read from and mitten to the desired location on the media.

"An important and continuing goal in the data storage industry is that of increasing the density of data stored on a medium. For tape storage systems, that goal has led to increasing the track density on recording tape, and decreasing the thickness of the magnetic tape medium. However, the development of small footprint, higher performance tape drive systems has created various problems in the design of a tape head assembly for use in such systems."

In addition to obtaining background information on this patent application, VerticalNews editors also obtained the inventors' summary information for this patent application: "A magnetic device according to another embodiment includes a source of flux comprising a coil having multiple turns; and a magnetic yoke coupled to the source of flux, the magnetic yoke having a pole with two or more gaps, wherein the coil turns have a non-uniform placement in the magnetic yoke for altering a magnetic field formed at the at least one of the gaps during writing.

"A magnetic device according to vet another embodiment includes a source of flux; and a magnetic pole coupled to the source of flux, the magnetic pole having two or more gaps. A geometry of the magnetic pole near or at one of the gaps is different than a geometry of the magnetic pole near or at another of the gaps to help equalize fields formed at the gaps when the source of flux is generating flux.

"Any of these embodiments may be implemented in a magnetic data storage system such as a tape drive system, which may include a magnetic head as recited above, a drive mechanism for passing a magnetic medium (e.g., recording tape) over the magnetic head, and a controller electrically coupled to the magnetic head.

"Other aspects and embodiments of the present invention will become apparent from the following detailed description, which, when taken in conjunction with the drawings, illustrate by way of example the principles of the invention.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

"FIG. is a schematic diagram of a simplified tape drive system according to one embodiment.

"FIG. 2 is a partial ape bearing surface view of a head according to one embodiment.

"FIG. 3 is a cross sectional view of FIG. 2 taken along Line 3-3 of FIG. 2.

"FIG. 4 shows an alternate embodiment having a pancake coil.

"FIG. 5 is a cross sectional view of FIG. 2 taken along Line 5-5 of FIG. 2.

"FIG. 6 is a partial tape bearing surface of a head according to One embodiment.

"FIG. 7 is a partial tape bearing surface of a head according to one embodiment.

"FIG. 8 is a partial tape bearing surface of a head according to one embodiment.

"FIG. 9A is a partial tape bearing surface of a tandem head according to one embodiment.

"FIG. 9B is a cross sectional view of FIG. 9A taken along Line 9B-9B of FIG. 9A.

"FIGS. 10A-C illustrate one method for forming a writer.

"FIGS. 11A-C illustrate another method for forming a writer.

"FIGS. 12A-C illustrate yet another method for forming a writer.

"FIG. 13A is a partial tape bearing surface of a head according to one embodiment.

"FIG. 13B is a partial cross-sectional view of FIG. 13A taken along Line 13B-13B of FIG. 13A.

"FIG. 13C is a partial cross-sectional view a head according to one embodiment.

"FIG. 13D is a partial cross-sectional view a head according to one embodiment.

"FIG. 13E is a partial cross-sectional view a head according to one embodiment."

For more information, see this patent application: Biskeborn, Robert G.; Herget, Philipp; Webb, Bucknell C. Magnetic Writer Having Multiple Gaps with More Uniform Magnetic Fields across the Gaps. Filed January 9, 2014 and posted May 15, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=4145&p=83&f=G&l=50&d=PG01&S1=20140508.PD.&OS=PD/20140508&RS=PD/20140508

Keywords for this news article include: Information Technology, Information and Data Storage, International Business Machines Corporation.

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Source: Information Technology Newsweekly


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