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Dynamic reference plane compensation

A reference plane, dynamic technique, applied in the field of surface analysis, which can solve problems such as corrupt data, head damage, damage, etc.

Inactive Publication Date: 2009-09-23
恪纳腾技术公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the read / write head comes into contact with the disk surface, data magnetically stored on the disk can be damaged
Also, damage to the head is possible if it comes into physical contact with the spinning disk
In some current hard drives, since the platter can spin at several thousand revolutions per minute (RPM), if the head and the spinning platter come into physical contact, considerable damage can be caused to both of them

Method used

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Embodiment Construction

[0014] In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the invention. Embodiments of the invention may be practiced without some or all of these specific details. Additionally, well known process operations have not been described in detail in order not to unnecessarily obscure the present invention.

[0015] Additionally, reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment. The appearances of the phrase "in one embodiment" in various places in the specification may or may not all be referring to the same embodiment.

[0016] figure 1 is a schematic diagram of a system for dynamic reference plane compensation according to one embodiment. refer to figure 1 , the system includes a dual-channel differential phase detector 100 , a mea...

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Abstract

In one embodiment, a method of dynamic reference plane compensation includes directing radiation from a first radiation source onto a surface (232) of an object (230) based on reflections from a first location on said surface (232) Generating an uncompensated measurement signal from radiation reflected from a second location, and radiation reflected from a second location; generating a compensation signal from radiation reflected from a third location and a fourth location on said surface (232); and using said uncompensated measurement signal and The compensation signal generates a compensated measurement signal.

Description

technical field [0001] This invention relates to surface analysis techniques and, more particularly, to dynamic reference plane leveling. Background technique [0002] Many technical applications involve measuring the condition of surfaces. For example, in the field of disc drives, determining the microscopic topology of the disc surface at different stages during production is becoming an increasingly important factor in estimating the likelihood of producing a disc of satisfactory quality. Given the high density of data stored on such disks, surface topography distributions ranging in height from less than 1 nanometer to tens of micrometers can be monitored with a lateral resolution on the order of 1 micrometer. [0003] In a storage device such as a hard disk drive, the read / write head is very close to the spinning platter. The read-write head enables magnetic access (rather than physical access) to the disk to read and / or write bits of data. However, data magnetically...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/02G01B9/02G11B5/48
CPCG11B5/6052G01B9/0207G11B5/6011
Inventor 哈拉尔德·赫斯汤姆·卡尔罗曼·萨裴
Owner 恪纳腾技术公司