# US 5,706,573 A · Method for fabricating a hard disk driving apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,706,573 A - Document ID: US5706573A - Status: Granted - Kind: A - Application number: 08/527,059 - Filed: 1995-09-12 - Granted: 1998-01-13 - Earliest claimed: 1994-10-27 - Assignees: Samsung Electronics Co.Ltd. - Inventors: Joo-Shik Lee - Web page: https://patentgrep.com/patent/US5706573A ## CPC - G11B 33/121: {the apparatus comprising a single recording/reproducing device} - G11B 5/5569: {details of specially adapted mobile parts, e.g. electromechanical control devices (motors in general H02K)} - G11B 25/043: {using rotating discs} - Y10T 29/49025: Making disc drive - 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) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A fabricating technique for a hard disk driver comprises: mounting a bottom plate onto a base having nuts integrally embedded therein by screwing fixing screws into the nuts via the corresponding tapped holes formed in the bottom plate so as to produce a first structure, surface treating the first structure, mounting a top plate having a pair of legs at opposite end portions bent in a L-shape onto the bottom plate by screwing fixing screws into the nuts via respective holes of the legs and corresponding tapped holes formed in the bottom plate so as to produce a second structure, and surface treating the second structure. Surface-treating the first and second structures are performed using an electrodeposit coating process so that dust particles accumulated during fabrication can be easily eliminated and static friction between recording head and recording medium embodied therein can be prevented. ## Claims ### Claim 1 A method for fabricating a voice coil motor assembly in a disk driver, comprising: mounting a bottom plate onto a base having nuts integrally embedded therein by screwing a first plurality of screws into the nuts of said base via corresponding tapped holes formed in the bottom plate; forming a first structure by attaching a first magnet onto an exterior surface of said bottom plate; treating a surface of the first structure with a protective coating; forming a second structure by attaching a second magnet onto an interior surface of a top plate having legs at opposite end portions bent in a L-shape; treating the surface of the second structure with said protective coating; and mounting said top plate onto said bottom plate by screwing a second plurality of screws into the nuts of said base via respective holes of the legs and corresponding tapped holes formed in the bottom plate. ### Claim 2 (depends on 1) The method as claimed in claim 1, wherein said protective coating of said first and second structures is provided by an electrodeposit coating process. ### Claim 3 (depends on 1) The method as claimed in claim 1, wherein said first magnet is attached onto the exterior surface of said bottom plate, and said second magnet is attached onto the interior surface of said top plate by adhesive exhibiting conductive characteristics, respectively. ### Claim 4 A method for fabricating a voice coil motor assembly in a disk drive, comprising: affixing a bottom plate onto a base of a housing with adhesive exhibiting conductive characteristics; forming a first structure by attaching a first magnet with adhesive exhibiting conductive characteristics onto an exterior surface of said bottom plate; treating the surface of the first structure using an electrodeposit coating process; affixing a top plate bent into a U-shape to a cover of a housing with adhesive exhibiting conductive characteristics; forming a second structure by attaching a second magnet with adhesive exhibiting conductive characteristics onto an interior surface of said top plate; treating the surface of the second structure using the electrodeposit coating process; and mounting the top plate attached to the cover onto the bottom plate affixed to the base. ### Claim 5 (depends on 4) The method as claimed in claim 4, wherein the surface of said first and second structures is treated by dipping said first and second structures into an electrodeposit coating bath. ### Claim 6 (depends on 4) The method as claimed in claim 4, wherein the surface of said first and second structures is treated with an electrodeposit coating. ### Claim 7 A method for fabricating a voice coil motor assembly in a disk drive, comprising: affixing a bottom plate onto a base of a housing by adhesive exhibiting conductive characteristics; forming a first structure by attaching a first magnet by adhesive exhibiting conductive characteristics onto an exterior surface of said bottom plate; applying a protection coating on an exterior surface of said first structure; affixing a top plate bent into a U-shape to a cover of a housing by adhesive exhibiting conductive characteristics; forming a second structure by attaching a second magnet by adhesive exhibiting conductive characteristics onto an interior surface of said top plate; applying a protection coating on said second structure; mounting the top plate attached to the cover onto the bottom plate affixed to the base. ### Claim 8 (depends on 7) The method as claimed in claim 7, wherein said protection coating is applied onto said first structure by an electrodeposit coating process. ### Claim 9 (depends on 7) The method as claimed in claim 7, wherein said protection coating is applied onto said second structure by dipping said second structure into an electrodeposit coating bath. ### Claim 10 A method for fabricating a voice coil motor structure in a disk driver, comprising: mounting a bottom plate onto a base having nuts integrally embedded therein by screwing a first plurality of screws into the nuts of said base via corresponding tapped holes formed in the bottom plate; attaching a first magnet onto an exterior surface of said bottom plate with adhesive exhibiting electrically conductive characteristics; treating a surface of the first structure with a protective coating; attaching a second magnet onto an interior surface of a top plate having a pair of legs at opposite end portions bent in a L-shape by adhesive exhibiting electrically conductive characteristics; treating the surface of the second structure with said protective coating; mounting said top plate onto said bottom plate by screwing a second plurality of screws into the nuts of said base via respective holes of the legs and the corresponding tapped holes formed in the bottom plate to form said voice coil motor structure; and applying an electrodeposit coating on surfaces of said voice coil motor structure. ### Claim 11 A disk drive fabrication process comprising: mounting an actuator on a base having a substantially rectangular shape and having first and second plurality of threaded nuts integrally formed therein, for rotatably supporting a transducer head to record information on a recording medium and to reproduce information from the recording medium; forming a voice coil motor assembly on the base, for enabling said actuator to rotate substantially in a radial direction of the recording medium, said voice coil motor assembly being formed by the steps of: affixing a bottom plate having a first magnet attached thereon, on said base by screwing a first plurality of screws into said base via corresponding tapped holes formed in said bottom plate; and affixing a top plate having legs at opposite end portions bent into a L-shape and having a second magnet attached thereon, on said bottom plate by screwing a second plurality of screws into said base via respective holes of the legs and the corresponding tapped holes formed in said bottom plate, after opposite surfaces of said bottom plate and said top plate have been treated with a protective coating; and mounting a coil on said actuator between said first and second magnets, for interacting with said magnets to produce magnetic flux enabling said actuator to rotate substantially in the radial direction of the recording medium. ### Claim 12 (depends on 11) The disk drive fabrication process of claim 11, wherein said protective coating is provided by an electrodeposit coating process. ### Claim 13 (depends on 11) The disk drive fabrication process of claim 11, wherein said first magnet is attached onto the exterior surface of said bottom plate, and said second magnet is attached onto the interior surface of said top plate by adhesive exhibiting conductive characteristics, respectively. ### Claim 14 A disk drive fabrication process comprising: mounting an actuator on a base having a substantially rectangularly shape, for supporting a transducer head to record information on a recording medium and to read information from the recording medium; forming a voice coil motor assembly on said base for enabling said actuator to rotate substantially in a radial direction of the recording medium, said voice coil motor assembly being formed by the steps of: affixing a bottom plate having a first magnet attached thereon, on said base by adhesive exhibiting conductive characteristics; affixing a top plate bent into a U-shape and having a second magnet attached thereon, on a cover of a housing by said adhesive; and drawing said top plate against said bottom plate to secure around said bottom plate by said adhesive after each of said bottom plate affixed on said base and said top plate affixed on said cover has been treated with a protective coating; and mounting a coil on said actuator between said first and second magnets, for interacting with said magnets to produce magnetic flux enabling said actuator to rotate substantially in the radial direction of the recording medium. ### Claim 15 (depends on 14) The disk drive fabrication process of claim 14, wherein said protective coating is provided by an electrodeposit coating process.