HGST Assigned Three Patents

Storage device with adaptive error-correcting code
for improved areal efficiency

HGST BV, Amsterdam, The Netherlands, has been assigned a patent (8,301,948) developed by Mario Blaum, Kurt A. Rubin, San Jose, CA, and Manfred E. Schabes, Saratoga, CA, for a "storage device with adaptive error-correcting code for improved areal efficiency."

The abstract of the patent published by the U.S. Patent and Trademark Office states: "A method for adaptively applying an error-correcting code to a storage device is disclosed. A determination is made that a system is in an idle state of input/output requests. First data symbols are copied into a first location within a buffer. First data symbol errors corrected using a first error-correcting code. Second data symbols including corrected bits are written in a second location on the recording media with a second error-correcting code. An error number for the second data symbols in the second location is determined. If the error number is below a first threshold error number, the first data symbols are deleted. If the error number is above the first threshold error number, the second data symbols are deleted."

The patent application was filed on Aug. 10, 2009 (12/538,367).

HDDs using a bi-product of manufacturing
a ZTMD lubricant to trap sub-micrometer particles

HGST BV, Amsterdam, The Netherlands, has been assigned a patent (8,300,354) developed by Xing-Cai Guo, Tracy, CA, for a "hard disk drives using a bi-product of manufacturing a ZTMD lubricant to trap sub-micrometer particles."

The abstract of the patent published by the U.S. Patent and Trademark Office states: "A magnetic disk drive having a layer of ZTMD raffinate coated within a housing of the disk drive to trap debris in order to prevent contamination related failure of the disk drive. The ZTMD raffinate can be applied to the inside of the housing of the disk drive, such as to side walls of the housing and or the cover of the housing. The ZTMD raffinate can also be applied to a filter structure within the housing in order improve the performance of the filter structure and prevent contamination collected thereon from becoming dislodged."

The patent application was filed on Dec. 23, 2009 (12/646,814).

Magnetic storage device which includes
a three terminal magnetic sensor having a collector region
electrically isolated from a slider body

HGST BV, Amsterdam, The Netherlands, has been assigned a patent (8,300,366) developed by Jeffrey S. Lille, Sunnyvale, CA, for a "magnetic storage device which includes a three terminal magnetic sensor having a collector region electrically isolated from a slider body."

The abstract of the patent published by the U.S. Patent and Trademark Office states: "In one illustrative example, a magnetic storage device includes a three terminal magnetic sensor having a collector region made of a semiconductor material, a base region, and an emitter region. An insulator layer is formed between the collector region and a slider body which carries the three terminal magnetic sensor. The insulator layer serves to reduce a capacitance otherwise present between the collector region and magnetic media at a magnetic field sensing plane of the three terminal magnetic sensor. Thus, the insulator layer electrically isolates the collector region from the slider body. The structure may be formed through use of a separation by implanting oxygen (SIMOX) technique or a wafer-bonding technique, as examples."

The patent application was filed on Sept. 12, 2007 (11/900,537).