Patents by Inventor Terence T.L. Lam

Terence T.L. Lam 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).

  • Patent number: 8947827
    Abstract: In one general embodiment, a magnetic head includes a stitch pole; and a main pole formed adjacent the stitch pole, wherein an end region of the stitch pole closest to an air bearing surface of the head tapers towards the main pole. In another general embodiment, a magnetic head includes a stitch pole being a laminate of at least two magnetic layers separated by a nonmagnetic layer; and a main pole formed adjacent the stitch pole. An end region of the stitch pole closest to an air bearing surface of the head tapers towards the main pole. An average angle of the taper of the end region of the stitch pole is between about 20 and about 45 degrees. Such head may be implemented in a data storage system.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: February 3, 2015
    Assignee: HGST Netherlands B.V.
    Inventors: Venkata R. K. Gorantla, Wen-Chien D. Hsiao, Yimin Hsu, Terence T. L. Lam, Yansheng Luo, Aron Pentek, Katalin Pentek
  • Patent number: 8947828
    Abstract: In one embodiment, an apparatus includes a main pole, at least one side shield positioned on sides of the main pole, and a trailing shield having a multi-bump structure positioned near a trailing side of the main pole, wherein the multi-bump structure has six junctures along the trailing shield facing the main pole, a first juncture positioned at a media-facing surface, a sixth juncture positioned away from the media-facing surface, and second, third, fourth, and fifth junctures positioned along the side of the trailing shield facing the main pole between the first and sixth juncture, wherein an element height of a first face of the trailing shield positioned between the fourth and fifth juncture is less than an element height of a second face of the trailing shield positioned at an end of the trailing shield positioned opposite the media-facing surface of the trailing shield.
    Type: Grant
    Filed: March 18, 2014
    Date of Patent: February 3, 2015
    Assignee: HGST Netherlands B.V.
    Inventors: Wen-Chien D. Hsiao, Na Young Kim, Terence T. L. Lam, Yansheng Luo, Aron Pentek, Honglin Zhu
  • Publication number: 20150029611
    Abstract: In one general embodiment, a magnetic head includes a stitch pole; and a main pole formed adjacent the stitch pole, wherein an end region of the stitch pole closest to an air bearing surface of the head tapers towards the main pole. In another general embodiment, a magnetic head includes a stitch pole being a laminate of at least two magnetic layers separated b a nonmagnetic layer; and a main pole formed adjacent the stitch pole. An end region of the stitch pole closest to an bearing surface of the bead tapers towards the main pole. An average angle of the taper of the end region of the stitch pole is between about 20 and about 45 degrees. Such head may be implemented in a data storage system.
    Type: Application
    Filed: July 24, 2013
    Publication date: January 29, 2015
    Applicant: HGST Netherlands B.V.
    Inventors: Venkata R. K. Gorantla, Wen-Chien D. Hsiao, Yimin Hsu, Terence T. L. Lam, Yansheng Luo, Aron Pentek, Katalin Pentek
  • Publication number: 20140268420
    Abstract: A magnetic write head having a write pole with a novel configuration improving write field strength and field gradient while also reducing adjacent track interference and far track interference. The write pole is configured with a pole tip portion that has a narrow track width, preferably 15-30 degrees and a main yoke portion with a larger flare angle of about 45 degrees. The write pole also has an intermediate portion located between the pole tip and main pole portions. The intermediate portion includes a first portion adjacent to the pole tip that has a flare angle greater than the flare angle of the main yoke and has a second portion with a flare angle less than the flare angle of the yoke.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: HGST NETHERLANDS B.V.
    Inventors: Yingjian Chen, Shiwen Huang, Terence T. L. Lam, Mun H. Park, Kyusik Shin, Yi Zheng, Yuming Zhou
  • Patent number: 8780499
    Abstract: A magnetic write head having a write pole and a trailing, wrap-around magnetic shield formed over the write pole and separated from the write pole by a non-magnetic trailing gap layer and non-magnetic side gap layers. The write head includes a remnant magnetic seed layer, that while being used to facilitate electroplating of the magnetic shield, is left intentionally extending beyond the back edge of the magnetic shield. This extended portion of the magnetic seed layer acts as a shunt for magnetic flux and prevents data erasure due to over-writing.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: July 15, 2014
    Assignee: HGST Netherlands B.V.
    Inventors: Wen-Chien D. Hsiao, Quan-chiu H. Lam, Terence T. L. Lam, Aron Pentek, Yi Zheng, Yuming Zhou
  • Publication number: 20140168823
    Abstract: A magnetic write head having a write pole and a trailing, wrap-around magnetic shield formed over the write pole and separated from the write pole by a non-magnetic trailing gap layer and non-magnetic side gap layers. The write head includes a remnant magnetic seed layer, that while being used to facilitate electroplating of the magnetic shield, is left intentionally extending beyond the back edge of the magnetic shield. This extended portion of the magnetic seed layer acts as a shunt for magnetic flux and prevents data erasure due to over-writing.
    Type: Application
    Filed: December 19, 2012
    Publication date: June 19, 2014
    Applicant: HGST NETHERLANDS B.V.
    Inventors: Wen-Chien D. Hsiao, Quan-chiu H. Lam, Terence T. L. Lam, Aron Pentek, Yi Zheng, Yuming Zhou
  • Publication number: 20140002927
    Abstract: A magnetic write head for magnetic data recording that includes a structure having a low coefficient of thermal expansion for controlling thermal expansion of the write head. The structure having a low coefficient of thermal expansion has a shape that substantially conforms to the shape of the write coil, such that both the write coil and the structure having a low coefficient of thermal expansion have a central portion that is located closest to the air bearing surface and outer end portions that bend away from the air bearing surface to form a horseshoe shape.
    Type: Application
    Filed: June 28, 2012
    Publication date: January 2, 2014
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Wen-Chien D. Hsiao, Terence T.L. Lam, Yansheng Luo, Xinjiang Shen