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US 7,031,105 B2Granted
Media enclosures providing reduced air gap around disk drive media surfaces of a disk drive
AssigneeSamsung Electronics Co., Ltd.
InventorsSeong Hoon Kim, Tae Yeon Hwang, Tho Pham
Life of this patent
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Abstract
The inventors have discovered that aerodynamic forces contribute to disk fluttering. If the flow of air about these disk surfaces is unstable, the resulting aerodynamic forces can mechanically excite the disk surfaces, causing fluttering. The invention includes media enclosures constraining such aerodynamic effects, methods of making disk drives with these enclosures, the disk drives. This includes disk drives of at most 13 millimeters in height.
Claims19
A disk drive, comprising:
- a disk drive cover including an top surface separated from an upper disk surface of said disk drive by essentially a first gap;
- a disk drive base including a bottom surface separated from a lower disk surface of said disk drive by essentially a second gap;
- and
- a disk containing each member of a disk surface collection comprising said upper disk surface and said lower disk surface;
- wherein all of said disk surface collection members rotate at an operating rotational velocity;
- wherein rotation of said disk surface collection member at said operating rotational velocity corresponds to a boundary layer thickness from said disk surface collection members, for each of said disk surface collection members;
- wherein said disk drive cover further includes a second top surface region formed to facilitate the motion of an actuator arm between said disk cover and said upper disk surface;
- wherein said operating rotational velocity is at least 5400 revolutions per minute;
- wherein said gap collection is comprised of said first gap and said second gap;
- wherein said disk drive has a height of at most 13 millimeters;
- wherein said gap collection member is at most three quarters of said boundary layer thickness.
8 more elements
A media enclosure for a disk drive, comprising:
- a disk drive cover including a top surface separated from an upper disk surface of a disk by essentially a first gap;
- and
- a disk drive base including a bottom surface separated from a lower disk surface of said disk by essentially a second gap;
- wherein each member of a disk surface collection rotates at an operating rotational velocity;
- wherein said disk surface collection is comprised of said upper disk surface and said lower disk surface;
- wherein rotation of said disk surface collection member at said operating rotational velocity corresponds to a boundary layer thickness from said disk surface collection member, for each of said disk surface collection members;
- wherein said media enclosure encloses said disk of said disk drive when assembled;
- wherein said disk includes each member of said disk surface collection;
- wherein said disk drive has a height of at most 13 millimeters;
- wherein said gap collection is comprised of said first gap and said second gap;
- wherein said gap collection member is at most three quarters of said boundary layer thickness.
8 more elements
Dependencies are inferred from the claim text.