A hard disk drive, an iron oxide type cover plate for a hard disk drive casing, and a method for manufacturing a cover plate for a hard disk drive
A hard disk drive, iron oxidation technology, used in the manufacture of magnetic flux-sensitive magnetic heads, instruments, arm parts, etc., can solve problems affecting drive reliability, stainless steel is not anti-corrosion or rust, weak write operations, etc.
Active Publication Date: 2018-07-17
WESTERN DIGITAL TECH INC
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Problems solved by technology
However, stainless steel is not anti-corrosion or anti-rust, so there is a phenomenon called "Fe smear" or "iron smear" in HDD technology
Along with Fe smearing, iron contamination migrates e.g. from the cover to the slider or disk, which in turn can cause weak write operations
Weak write operations are considered to a certain extent as HDD failures, which directly affects the reliability of the drive
Therefore, there are challenges associated with suppressing Fe smearing in HDD
Method used
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[0011] A scheme for iron-oxidized hard disk drive cover plates to suppress iron contamination is described. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention described herein. It will be apparent, however, that the embodiments of the invention described herein may be practiced without these specific details. In other words, well-known structures and devices are shown in block diagram form in order to avoid unnecessarily obscuring the embodiments of the invention described herein.
[0012] A physical description of the illustrative operating environment
[0013] Embodiments may be used in, but not limited to, enclosure covers for hard disk drive (HDD) storage devices. Thus, according to an embodiment, at figure 1 A plan view illustrating HDD 100 is shown in , to illustrate an exemplary operating environment.
[0014] figure 1 Illustrating the fu...
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A hard disk drive, an iron oxide type hard disk drive (HDD) casing cover plate and a method of manufacturing the cover plate, the inner surface of the cover plate is substantially free of unoxidized iron or pure metallic iron, and by baking the stainless steel cover plate and thereby making The surface of the iron cover plate is oxidized to manufacture the cover plate. Because the cover plate is iron oxide type, the expensive nickel plating process can be omitted, and the problem of "Fe smearing" can be significantly reduced at the same time. Such an iron oxide type cover is particularly advantageous for use as an inner cover in a sealed HDD, but is not limited thereto.
Description
technical field [0001] Embodiments of the invention may relate generally to hard disk drives, and more particularly to iron oxide type cover plates for preventing or reducing iron contamination. Background technique [0002] A hard disk drive (HDD) is a non-volatile storage device that is housed in a protective housing and stores digitally encoded data on one or more platters with magnetic surfaces. When the HDD is in operation, each magnetic recording disk is spun rapidly by a spindle system. Data is read from or written to a magnetic recording disk using a read / write head positioned by an actuator over a specific location on the disk. The read / write head uses a magnetic field to read data from or write data to the surface of the magnetic recording disk. The write head uses electricity flowing through a coil, which passes the current through the coil to generate a magnetic field. Electrical pulses are sent to the write head in different patterns of positive and negative ...
Claims
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IPC IPC(8): G11B33/14G11B25/04G11B5/48
CPCG11B5/4833G11B25/043G11B33/1446G11B5/39
Inventor 谷口友规津波古和司铃木浩一田村政彦
Owner WESTERN DIGITAL TECH INC