# US 5,886,850 A · High capacity, low profile disk drive system

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- Number: US 5,886,850 A
- Document ID: US5886850A
- Status: Granted
- Kind: A
- Application number: 08/441,671
- Filed: 1995-05-15
- Granted: 1999-03-23
- Earliest claimed: 1991-09-24
- Assignees: TEAC Corporation; DZU Corporation
- Inventors: Steven Louis Kaczeus; William Nicholas Thanos; James Drury Fahey
- Web page: https://patentgrep.com/patent/US5886850A

## CPC

- G11B 33/121: {the apparatus comprising a single recording/reproducing device}
- G06F 13/4081: {Live connection to bus, e.g. hot-plugging (current or voltage limitation during live insertion H02H9/004)}
- G11B 25/043: {using rotating discs}
- G11B 33/122: {Arrangements for providing electrical connections, e.g. connectors, cables, switches}
- G11B 33/1446: {Reducing contamination, e.g. by dust, debris}
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

A disk drive system provides a low height device by mounting a circuit board or boards containing the electronic circuitry in the same enclosure with the head-disk assembly (HDA). The drive actuator mechanism is positioned at one side of one end of the enclosure and the circuit board or boards are positioned at the other side of that end of the enclosure. A gasket seals the HDA from contaminants, while the enclosure protects the electronic circuitry and cables from physical damage, electrostatic charges and electromagnetic interference. The circuit board or boards can be removed from the enclosure without removing the entire disk drive from the using system, and the entire drive assembly can readily be removed from the using system for replacement or use in another system.

## Claims

### Claim 1

A disk drive assembly comprising:
a three dimensional enclosure having a lateral form factor area defined between two side walls of the enclosure and a first end and a second end of the enclosure and a vertical thickness;
a seal disposed within the enclosure, the seal defining a sealed volume and a circuit volume outside the sealed volume and within the enclosure;
at least one disk disposed inside said sealed volume, said disk being rotatable in a plane;
a disk spindle motor to rotate said at least one disk;
a transducing head for transducing data from said at least one disk;
a head actuator assembly disposed inside said enclosure at said first end of said enclosure;
a printed circuit board assembly removably mounted in said circuit volume, in a plane substantially parallel to said plane in which said at least one disk is rotatable and adjacent laterally to said head actuator assembly at said first end of said enclosure and further wherein a top of said enclosure completely covers the printed circuit board assembly;
electronics controlling said head actuator, said spindle motor and controlling the flow of data from said transducing head, said electronics mounted in close proximity in substantially the same plane on said printed circuit board assembly;
a first connector connecting said electronics on said printed circuit board assembly to said transducing head and said actuator assembly; and
a second connector mounted on said printed circuit board assembly along the first end opposite from the at least one disk and matable with a connector exterior to said disk drive assembly.

### Claim 2 (depends on 1)

The disk drive assembly of claim 1 wherein the printed circuit board assembly is removable from said circuit volume of said enclosure without breaking the seal of said sealed volume.

### Claim 3 (depends on 1)

The disk drive assembly of claim 1 wherein said second connector further comprises a connector block located in said first end opposite from the at least one disk and oriented outward therefrom.

### Claim 4 (depends on 1)

The disk drive assembly of claim 1 wherein said three dimensional enclosure further includes a base member extending from said first end to said second end.

### Claim 5 (depends on 4)

The disk drive assembly of claim 4 wherein said base member is directly adjacent and parallel to said printed circuit board assembly.

### Claim 6

A disk drive assembly comprising:
a three dimensional enclosure having a lateral form factor area defined between two side walls of the enclosure, a base member, and first and second ends of the enclosure and a vertical thickness, wherein said base member extends from said first end to said second end;
a seal disposed within the enclosure, the seal defining a sealed volume and a circuit volume outside the sealed volume and within the enclosure;
at least one disk disposed inside said sealed volume, said disk being rotatable in a plane which is parallel to said base member;
a disk spindle motor to rotate said at least one disk;
a transducing head for transducing data from said at least one disk;
a head actuator assembly disposed inside said enclosure at said first end of said enclosure;
a printed circuit board assembly disposed in said circuit volume, in a plane substantially parallel to said plane in which said at least one disk is rotatable and adjacent laterally to said head actuator assembly at said first end of said enclosure, said printed circuit board assembly directly adjacent and parallel to said base member and further wherein a top of said enclosure completely covers the printed circuit board assembly; and
electronics controlling said head actuator, said spindle motor and controlling the flow of data from said transducing head, said electronics mounted in close proximity in substantially the same plane on said printed circuit board assembly.

### Claim 7 (depends on 6)

The disk drive assembly of claim 6 wherein the printed circuit board assembly is removable from said circuit volume of said enclosure without breaking the seal of said sealed volume.

### Claim 8 (depends on 6)

The disk drive assembly of claim 6 wherein said electronics are mounted on both sides of said printed circuit board assembly.

### Claim 9 (depends on 6)

The disk drive assembly of claim 6 wherein said at least one disk is further characterized as comprising more than two disks.

### Claim 10 (depends on 6)

The disk drive assembly of claim 6 wherein said vertical thickness of said form factor is approximately 0.350 inches.

### Claim 11 (depends on 6)

The disk drive assembly of claim 6 further comprising:
a connector block electrically connected to said electronics, said connector block located in the first end of said enclosure opposite from the at least one disk.

### Claim 12 (depends on 11)

The disk drive assembly of claim 11 wherein said connector block is oriented outward from said first end of said enclosure opposite from said at least one disk to mate with an external connector cable to provide interchange of signals between said electronics and a using system in which said disk drive assembly is installed.