Effect of Disk Asperity Size on Contact-Induced Head Scratches and Reader Temperature of a Thermal Flying Height Control Slider–Disk Interface

2015 ◽  
Vol 51 (11) ◽  
pp. 1-4
Author(s):  
Wenping Song ◽  
Longqiu Li ◽  
Andrey Ovcharenko ◽  
Chuanwei Zhang ◽  
Frank E. Talke
Keyword(s):  
Flying Height ◽  
Disk Interface ◽  
Height Control ◽  
Thermal Flying Height Control

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

Flying Clearance Distribution With Thermal Flying Height Control in Hard Disk Drives

2010 ◽  
Vol 132 (2) ◽  
Author(s):  
Sung-Chang Lee ◽  
George W. Tyndall ◽  
Mike Suk
Keyword(s):  
Temperature Compensation ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Flying Height ◽  
Disk Drives ◽  
Disk Interface ◽  
Height Control ◽  
Thermal Flying Height Control ◽  
Height Change ◽  
The Individual

Flying clearance distribution with thermal flying height control (or thermomechanical actuation) is characterized. Especially, factors contributing to variation in the flying clearance are identified based on the flying height change profiles taken from the burn-in process of hard disk drives and Gage R&R (repeatability and reproducibility) test of touch down repeatability. In addition, the effect of static temperature compensation scheme on the flying clearance distribution is investigated, and the disadvantage of static adaptation to temperature change is identified. In order to avoid early catastrophic head-disk interface failures due to poor static temperature compensation, dynamic clearance adjustment is necessary whenever environmental condition changes. Otherwise, static temperature compensation using the individual temperature sensitivity values of each head needs to be applied.

scholarly journals Particle Contamination on a Thermal Flying-Height Control Slider

2009 ◽  
Author(s):  
Nan Liu ◽  
David B. Bogy
Keyword(s):  
Disk Drive ◽  
Flying Height ◽  
Head Disk Interface ◽  
Direction Parallel ◽  
Disk Interface ◽  
Height Control ◽  
Thermophoretic Force ◽  
Thermal Flying Height Control ◽  
Particle Contamination ◽  
Saffman Lift Force

Particle contamination on a slider in a hard disk drive (HDD) affects the HDD’s reliability. With the introduction of the thermal flying-height control (TFC) slider, the temperature in the head-disk interface (HDI) becomes non-uniform, which induces a temperature-gradient dependent force on particles moving in the HDI. This paper investigates the effect of this force, the so called thermophoretic force, on a particle’s motion in the HDI as well as its effect on particle contamination on the TFC slider. By numerical simulation of the particle’s trajectory together with an analytical analysis, we show that the thermophoretic force is always negligible compared to the Saffman lift force, which points to a direction parallel to the thermophoretic force. We conclude that the current particle contamination simulator without any thermophoretic forces included would not be significantly altered by the inclusion of these forces.

scholarly journals Investigation of Mechanical Clearance Change with Thermal Flying-height Control Slider at High Altitude

2010 ◽  
Vol 4 (1) ◽  
pp. 32-41 ◽  
Author(s):  
Satoru OOKUBO ◽  
Toshiya SHIRAMATSU ◽  
Masayuki KURITA ◽  
Hidekazu KOHIRA ◽  
Yoshinori TAKEUCHI
Keyword(s):  
High Altitude ◽  
Flying Height ◽  
Height Control ◽  
Thermal Flying Height Control ◽  
Clearance Change
Sign in / Sign up

Export Citation Format

Share Document