Air-Bearing Design Towards Highly Stable Head–Disk Interface at Ultralow Flying Height

2007 ◽  
Vol 43 (2) ◽  
pp. 715-720 ◽  
Author(s):  
Bo Liu ◽  
Shengkai Yu ◽  
Mingsheng Zhang ◽  
Leonard Gonzaga ◽  
Hui Li ◽  
...  
Keyword(s):  
Flying Height ◽  
Air Bearing ◽  
Head Disk Interface ◽  
Disk Interface ◽  
Bearing Design

Partial Contact Head-Disk Interface With Thermal Protrusion

2009 ◽  
Author(s):  
Du Chen ◽  
David B. Bogy
Keyword(s):  
Vibration Amplitude ◽  
Dynamic Performance ◽  
Flying Height ◽  
Air Bearing ◽  
Head Disk Interface ◽  
Dynamic Simulations ◽  
Disk Interface ◽  
Partial Contact ◽  
Thermal Protrusion ◽  
Bearing Design

A new partial contact head disk interface (HDI) with thermal protrusion is proposed for magnetic recording with densities of 1 Tbit/in2 and above. This HDI has the advantage of maintaining light contact between the slider and the disk, so that both the bouncing vibration amplitude and the contact force are small compared with a traditional partial contact HDI. The slider’s dynamic simulations are carried out to analyze the effect of various factors within the HDI on the slider’s dynamic performance, including the friction and adhesion between the slider and the disk, the track profile morphology of the disk and the air bearing design. It is found that the bouncing vibration amplitude can be reduced to the level of the flying height modulation (FHM) of a non-contact air bearing slider without thermal protrusion.

Air-Bearing Design Towards Super Stable Head-Disk Interface

2006 ◽  
Author(s):  
Bo Liu ◽  
MingSheng Zhang ◽  
Yijun Man ◽  
Shengkai Yu ◽  
Gonzaga Leonard ◽  
...  
Keyword(s):  
Air Bearing ◽  
Head Disk Interface ◽  
Disk Interface ◽  
Bearing Design

Contact ABS Design Concepts

2002 ◽  
Author(s):  
Junguo Xu ◽  
Hidekazu Kohira ◽  
Shozo Saegusa
Keyword(s):  
Frequency Shift ◽  
Friction Force ◽  
Flying Height ◽  
Air Bearing ◽  
Head Disk Interface ◽  
Bearing Surface ◽  
Disk Interface ◽  
Design Concepts ◽  
Smooth Disk

The design of a head-disk interface for an ultra-low flying height was studied from the viewpoint of contact vibration. It is known that a super-smooth disk is necessary for a slider to fly at an ultra-low flying height; however, such a disk increases the friction force, which potentially increases the vibration of the slider. To solve this problem, the head-disk interface must be optimized to reduce this increased vibration. We found that the use of micro-texture on the air bearing surface can prevent contact vibration. Combining trimming with the use of a micro-texture was most effective in reducing contact vibration. A frequency-shift-damping slider was also found to damp vibration effectively.

Wear Characteristics of Padded Air Bearing Sliders During a Contact Take-Off Process

1999 ◽  
Vol 122 (3) ◽  
pp. 628-632 ◽  
Author(s):  
Yong Hu
Keyword(s):  
New Technologies ◽  
Interface Roughness ◽  
Wear Volume ◽  
Air Bearing ◽  
Wear Factor ◽  
Wear Characteristics ◽  
Disk Interface ◽  
Force Profile ◽  
Bearing Design ◽  
Wear Law

The pressing and challenging demand for resolving the stiction/glide-height conflict, driven by today’s ever decreasing head/disk spacing, forces us to constantly search for new technologies. One of them is padding the slider’s air bearing surface. Although the padded air bearing sliders can significantly reduce the stiction, the wear of these landing pads becomes a central issue. This paper attempts to analytically predict the wear characteristics of the landing pads during a contact take-off process. A wear factor derived from the adhesive wear law is employed to measure the wear extent of the landing pads. The contact force profile and wear factor of each pad are calculated through the partial contact air bearing simulation of a slider’s take-off process. It is found that the rear pad wears an order magnitude more than the leading pads. The wear volume of the rear pad increases exponentially with pad height, interface roughness and altitude. Raising the leading pads alone slightly reduces the wear of the rear pad. Placing the rear pad away from the slider’s trailing edge, however, substantially alleviates the wear of the rear pad. Finally, a lightly textured pad/disk interface decreases the pads’ wear to a minimum value for a given padded air bearing design. [S0742-4787(00)01903-2]

Effect of Head–Disk Interface Biasing and Relative Humidity on Wear of Thermal Flying Height Control Sliders

2017 ◽  
Vol 65 (2) ◽  
Author(s):  
Liane M. Matthes ◽  
Frederick E. Spada ◽  
Andrey Ovcharenko ◽  
Bernhard E. Knigge ◽  
Frank E. Talke
Keyword(s):  
Relative Humidity ◽  
Flying Height ◽  
Head Disk Interface ◽  
Disk Interface ◽  
Height Control ◽  
Thermal Flying Height Control
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