摘要:
A magnetic recording disk drive has self-limiting wear contact type air-bearing sliders that support the read/write heads. The magnetic elements of the read/write head extend into and are surrounded by a wearable pad that protrudes beyond the air-bearing surface of the slider. The end of the protrusion pad and the ends of the magnetic elements are covered by a corrosion-resistant overcoat that protects the magnetic elements during slider fabrication and disk drive assembly. The overcoated protrusion pad sliders are assembled into the disk drive in a special environment, typically air with humidity controlled below a level above which corrosion of the magnetic elements would occur. The drive is then hermetically sealed and the drive is operated with the protrusion pads in contact with the disks until the overcoats and a portion of the pads are worn or burnished away. The combination of protrusion pad air bearing sliders with a hermetically sealed disk drive in a controlled atmosphere, and the burnishing of the head overcoat either after the drive has been sealed or under controlled humidity conditions prior to sealing, allows for a very low magnetic spacing to be achieved in manufacturable disk drives.
摘要:
A data storage disk drive is provided with a spindle which supports a plurality of disks having at least one magnetic disk surface to form a spindle assembly for rotation of the disk surfaces about a common axis and a rotary actuator which supports magnetic transducers for movement in unison about respective disk surfaces. The disk drive includes a disk drive enclosure having die-cast generated predetermined zero draft geometries for mounting the spindle motor shaft and the actuator bearing shaft. The enclosure includes a base casting and a cover casting, each casting including structure for locating and retaining electrical connectors used for connecting to a planar electronics card located outside the drive enclosure. The disk drive includes an effective and easily manufacturable electrical path from a flex circuit to an actuator comb. The disk drive includes a tubular chemical breather filter arranged with integral housing and diffusion channels formed in the cover casting.
摘要:
Approaches for a testing apparatus for evaluating a cover of a hard-disk drive. The testing apparatus may detect whether the cover has a defect that prevents the cover from being sufficiently airtight. The testing apparatus includes a base structure that comprises a concave recess shaped to receive the cover to be tested. When the cover is disposed within the concave recess, the cover forms a first chamber in the concave recess between the cover and the base structure. The testing apparatus also includes a removable lid. When the removable lid covers the concave recess with the cover disposed therein, the removable lid forms a second chamber in the concave recess between the cover, the base structure, and the removable lid. The testing apparatus also includes a means for introducing helium gas to one of the chambers and a means for detecting how much helium gas leaks from that chamber.
摘要:
A multi-functional cooking device that combines a steamer, skillet, griddle, fryer, kettle and oven into a single unit. The cooking device has a hollow base and a hollow lid. The base and the lid mate to provide an enclosed space for heating food. Heating means are associated with the base, to heat the interior space. Means are provided for lifting the lid relative to the base, and for maintaining the lid at a set position relative to the base. The base is adapted to receive water, so that when it is heated, steam will be formed in the space enclosed by the lid and base. The lower edge of the lid is recessed, and receives in the recess the upper edge of the base, whereby the mating of the two edges provides a junction to maintain steam within the space formed by the lid and base. A mechanism is provided for tilting the base at a predetermined angle, to facilitate the use of the base for grilling or frying foods.
摘要:
A fuel assembly for nuclear reactors which comprises the usual upper and lower tie plates and fuel rods extending between them is made debris-resistant by providing a grid spacer in contact, or very nearly so, with the lower tie plate and so positioned as to subdivide the usual openings in the lower tie plate which are provided for the passage of cooling water. This causes debris to be trapped in the openings of the lower tie plate, and keeps it from contacting the fueled portion of the assembly.
摘要:
A desiccant device that emits no contamination and is therefore suitable for use in an electronic device such as a magnetic disk drive system. The desiccant device includes a pouch formed of a laminate layer. The laminate layer includes a thin, non-permeable monolithic membrane laminated to a porous media. The thin, non-permeable monolithic membrane is thin enough to allow a desired vapor to pass there-through by molecular diffusion, but does not include any voids, pores or holes that would allow gas, liquid or solid to permeate there-through. Since the permeable membrane only passes vapor by molecular diffusion, it prohibits any dust fibers or other contamination from emitting from the desiccant device and thereby prevents contamination of the electronic device such as the disk drive.
摘要:
A system and associated methods are described for preparing a magnetic disk for installation within a disk drive system. For example, a polyfunctional lubricant may be mixed with a chemical agent to esterify the polyfunctional lubricant and cap hydroxyl groups of the polyfunctional lubricant. The magnetic disk may then be dip coated with the polyfunctional lubricant and chemical agent mixture. A polishing system then polishes the magnetic disk via an abrasive polishing tape after dip coating the magnetic disk. A portion of the chemical agent is then removed from the magnetic disk to bond a portion of the lubricant to the magnetic disk to prevent the lubricant from interfering with a read/write head when installed within a disk drive system.
摘要:
During wafer fabrication, a transportable enclosure, such as a Standard Manufacturing InterFace (SMIF) pod encloses a nascent product, such as a semiconductor wafer, to protect the wafer against contamination during manufacture, storage or transportation. However chemical vapors emitted inside the pod can accumulate in the air and degrade wafers during subsequent fabrication. In order to absorb the vapors inside a closed pod, a vapor removal element typically including an activated carbon absorber, covered by a particulate-filtering vapor-permeable barrier, and covered by a guard plate with holes is disposed within the enclosure. A vapor removal element is disposed closely adjacent to each respective wafer. Alternatively, a single vapor removal element is located inside the enclosure. In certain instances, a fan or thermo-buoyant circulation causes any vapors located inside the enclosure to a vapor removal element for removal. Alternatively a porous vapor removal element may be disposed for removing vapors from air entering the enclosure. In another embodiment a vapor removal element is integrated with the back face of each wafer.