Samsung Electronics Co., Ltd.

Western Digital (fremont), Inc.

Seagate Technology Incorporated

Molex Corporation

Other

Maxtor Corporation

Shuyu Zhang

Brian D Strom

SungChang Lee

Francis P Crimi

George Tyndall

Taizhong Huang

Glenn E Lee

Tadashi Yogi

Jafar Hadian

Lanshi Zheng

Senming Gong

Mike Chia Huang

Mike C Huang

A thermal compensator, for use in connection with arrayed waveguide grating (AWG) modules which are, in turn, utilized in conjunction with wavelength multiplexing and de-multiplexing within optical networks, is disclosed. The thermal compensator comprises a bow-shaped frame member and a central bar member. The bow-shaped frame member is characterized by a higher coefficient of thermal expansion than that of the central bar member such that the bow-shaped frame member can expand and contract at variable rates compared to that of the central bar member under certain temperature conditions. The bow-shaped frame member is adapted to be attached to a movable section of an athermal arrayed waveguide grating (AAWG) module such that the expansion and contraction movements of the bow-shaped member influence the movement of a movable section of the AAWG module in order to maintain the proper focus of the AAWG module across disparate temperature conditions.

Variable dual-directional thermal compensator for arrayed waveguide grating (AWG) modules

A thermal compensator, for use in connection with arrayed waveguide grating (AWG) modules which are, in turn, utilized in conjunction with wavelength multiplexing and de-multiplexing within optical networks, is disclosed. The thermal compensator comprises a bow-shaped frame member, a central bar member, and a screw. The bow-shaped frame member is characterized by a higher or great coefficient of thermal expansion (CTE) than that of the central bar member such that the bow-shaped frame member can expand and elongate at a greater rate than can the central bar member under hot temperature conditions, however, under cold temperature conditions, the rate of contraction of the bow-shaped member is effectively retarded by the slower rate of contraction of the central bar member. The bow-shaped frame member is adapted to be attached to a movable section of an athermal arrayed waveguide grating (AAWG) module such that the expansion and contraction movements of the bow-shaped member influence the movement of a movable section of the athermal arrayed waveguide grating (AAWG) module in order to maintain the proper focus of the athermal arrayed waveguide grating (AAWG) module across disparate temperature conditions within which the athermal arrayed waveguide grating (AAWG) module is designed to operate.

A disk drive for redirecting contaminating particulate matter away from an area bearing of a slider element. At least two etched channels are provided in the slider element of the disk drive. The at least two etched channels direct incoming air flow to a leading edge of the slider element from the leading edge towards respective sides of the slider element. Particulate matter that may be progressing towards the air bearing are redirected by virtue of the incoming air flow to the leading edge and expelled from the air bearing via the at least two etched channels.

Air bearing area configuration for contaminating particle removal

A disk drive is provided having one or more structural air bearing surface (ABS) features that can block particulate matter, such as lube droplets that may enter the air bearing from the trailing edge or rearward portion of the slider. Moreover, such structural ABS features can influence air flow within or about the air bearing to prevent or at least reduce the accumulation of particles and/or droplets in one or more areas of the air bearing to reduce the reliability problems induced by particle contamination and lube pick-up.

Multi step lube blocking air bearing area configuration

A disk drive is provided having a dynamic flying height or touch down power profile that is substantially flat across its stroke along the radius of a recording medium. At least two air-channeling elements are provided in a slider of the disk drive, that with the read/write head, flies above a surface of the recording medium. At an inner diameter and an outer diameter of the recording medium, the at least two air-channeling elements direct incoming air flow to an air bearing space defined by a bottom surface of the slider and the surface of the recording medium, increasing the flying height of the slider/read/write head at the inner diameter and outer diameter of the recording medium, thereby negating the effect of a middle diameter flying height hump of the recording medium.

Air bearing area configuration for reducing flying height hump across a stroke

A slider including air bearing surface with Flying height On-Demand (FOD) protrusion with method of controlling airflow to maximize FOD efficiency as ratio of change in vertical position to protrusion height. Slider including components controlling the air flow to maximize FOD efficiency and/or including specific components minimizing an air bearing pressure under a Flying height On Demand (FOD) operation away from a maximum air bearing pressure, placing a peak pressure off of an FOD area create by a FOD protrusion, and shrinking a high peak pressure area of the air bearing surface. Hard disk drive includes head stack assembly, which includes head gimbal assembly, which includes the slider. Manufacturing method for slider, head gimbal assembly, head stack assembly and hard disk drive, and these items as products of these processes.

Air bearing surface method and apparatus optimizing flying height on demand efficiency during flying height on demand activity of slider in a hard disk drive

A slider that includes a necked ABS pad is disclosed. More specifically, the slider includes an ABS pad having a first ABS region and a second ABS region, where the second ABS region is disposed immediately in front of the first ABS region proceeding in the direction of a leading edge of the slider. A transducer and a thermal actuator each may be disposed within the first ABS region. The width of the second ABS region (a necked portion of the ABS pad) is less than a width of the first ABS region.

Controlled fly height slider with necked ABS

A slider operating air bearing surface (ABS) to remove a front saturation water vapor pressure peak near a front bulwark and a bad flow pattern area the between front bulwark and a central island. The ABS implementing these operations. Alternatively, ABS includes a front bulwark channel in the front bulwark and a central fin between the front bulwark and the central island. Slider includes an embodiment of the ABS. Head gimbal assembly (HGA) includes the slider. Head stack assembly includes at least one HGA. Hard disk drive includes the head stack assembly. Manufacturing methods for the slider, the HGA, the head stack assembly, the hard disk drive, and these items as products of their manufacturing processes.

Method and apparatus for an air bearing surface to reduce contamination due to saturation water vapor pressure in a hard disk drive

Hard disk drive (HDD) including humidity sensor measuring interior and second humidity sensor measuring exterior with door actuator controlling door for mass transfer between interior and exterior based upon determination of whether or not to transfer. HDD may further include and use temperature sensors for interior and/or exterior to further control door. An embedded circuit and processor at least partly implementing these operations. External cover including door and door actuator, possibly second sensors. Manufacturing methods and these items as their products.

Method and apparatus intelligently adapting to environmental conditions inside and outside a hard disk drive

A disk drive for storing data includes a rotating storage disk and a slider positioned near the storage disk. The slider has a flying side and a read/write head. The flying side includes a leading bearing surface and a leading recessed surface positioned near a leading edge of the slider. The leading bearing surface can include a leading transverse section that is positioned within approximately 20 and 200 microns of the leading edge. The leading recessed surface is positioned between the leading transverse section and the leading edge. The leading bearing surface and the leading recessed surface cooperate to form a relatively high pressure area near the leading edge that facilitates a relatively rapid take-off of the slider away from the storage disk during start up of the disk drive.

Slider having fast take-off fluid bearing surface

A slider with an intake heater near front edge heating air passing between air bearing surface and rotating disk surface to reduce change in flying height caused by water condensation. Method of operating the slider. Head gimbals assembly including slider. Head stack assembly including at least one HGA. Operating hard disk drive by receiving temperature and humidity reading to determine heater control and asserting heater control to stimulate intake heater to heat air. Embedded processor directing hard disk drive at least partly implementing operations. Embedded circuit including embedded processor. A hard disk drive including temperature, humidity sensors, embedded circuit and head stack assembly. Manufacturing methods for slider, head gimbals assembly, head stack assembly, embedded processor, embedded circuit and hard disk drive, and these items as products of their manufacturing processes.

Method and apparatus reducing flying height drop in a hard disk drive under humid conditions

CSS hard disk drive providing improved take-off and/or touchdown by asserting pitch actuation control signal stimulating a pitch actuator to flex a flexure finger, altering the pitch angle of slider coupling through flexure finger to pitch actuator. Method implemented by embedded circuit and/or embedded processor. Manufacturing embedded processor, embedded circuit, CSS hard disk drive, and these process products.

Method and apparatus for improved starting and/or stopping in a contact start-stop (CSS) hard disk drive.

A disk drive includes a drive housing, a storage disk coupled to the drive housing and a head arm assembly coupled to the drive housing. The head arm assembly includes an adjuster and a slider coupled to the adjuster. As provided herein, the adjuster changes the gram load that is applied to the slider as the temperature near the adjuster changes. In one of the embodiments, the adjuster increases the gram load that is applied to the slider as the temperature near the adjuster decreases.

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Fremont, CA, United States of America

Shuyu Zhang