IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0448487
(2003-05-30)
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발명자
/ 주소 |
- Ojeda, Valentin
- Ali, David
- Berding, Keith R.
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출원인 / 주소 |
- Western Digital Technologies, Inc.
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인용정보 |
피인용 횟수 :
52 인용 특허 :
13 |
초록
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A disk drive that includes a head disk assembly (HDA) having a disk drive base, and a printed circuit board assembly (PCBA) in communication with the HDA. The invention further includes an acoustic damping assembly placed between the disk drive base and the PCBA. The acoustic damping assembly includ
A disk drive that includes a head disk assembly (HDA) having a disk drive base, and a printed circuit board assembly (PCBA) in communication with the HDA. The invention further includes an acoustic damping assembly placed between the disk drive base and the PCBA. The acoustic damping assembly includes first and second acoustic absorption layers having major surfaces, an acoustic barrier layer placed in between the major surfaces, and the major surfaces and the acoustic barrier layer are fixed in a stacked relationship.
대표청구항
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1. A disk drive comprising:a) a head disk assembly (HDA) comprising a disk drive base;b) a printed circuit board assembly (PCBA) in communication with the HDA; andc) an acoustic damping assembly placed between the disk drive base and the PCBA, wherein the acoustic damping assembly comprises:first an
1. A disk drive comprising:a) a head disk assembly (HDA) comprising a disk drive base;b) a printed circuit board assembly (PCBA) in communication with the HDA; andc) an acoustic damping assembly placed between the disk drive base and the PCBA, wherein the acoustic damping assembly comprises:first and second acoustic absorption layers having major surfaces wherein the first and second acoustic absorption layers comprise a foam composition;an acoustic barrier layer placed in between the major surfaces wherein the acoustic barrier layer is of a denser composition than each of the first and second acoustic absorption layers; andmeans for fixing the major surfaces and the acoustic barrier layer in a stacked relationship.2. A disk drive as defined in claim 1, wherein the acoustic damping assembly substantially covers the PCBA.3. A disk drive as defined in claim 1, wherein the acoustic barrier layer is of a consistent density and the acoustic absorption layers are each of a substantially inconsistent density.4. A disk drive as defined in claim 1, wherein the acoustic barrier layer comprises a plastic film.5. A disk drive as defined in claim 4, wherein the plastic film comprises a polyester composition.6. A disk drive as defined in claim 1, wherein the acoustic barrier layer comprises a metallic composition.7. A disk drive as defined in claim 6, wherein the metallic composition comprises at least one of a stainless steel and aluminum alloy.8. A disk drive as defined in claim 1, wherein the acoustic barrier layer is characterized by a thickness of approximately 0.010 inches.9. A disk drive as defined in claim 1, wherein the foam composition is a compressible foam.10. A disk drive as defined in claim 9, wherein the compressible foam is characterized by an unconstrained thickness d1.11. A disk drive as defined in claim 10, wherein the unconstrained thickness is approximately 0.079 inches.12. A disk drive as defined in claim 10, wherein the compressible foam is compressed to a thickness less than d1.13. A disk drive as defined in claim 12, wherein the compressed thickness is approximately 0.60(d1).14. A disk drive as defined in claim 1, wherein each of the major surfaces and the acoustic barrier layer are coextensive with one another.15. A disk drive as defined in claim 1, wherein the foam composition comprises at least one of an open cell type, a closed cell type, a semi-open cell type and a semi-closed cell type.16. A disk drive as defined in claim 1, wherein the foam composition comprises at least one of a polyvinylchloride foam, a polyethylene foam and a polyurethane foam.17. A disk drive as defined in claim 1, wherein the means for fixing the major surfaces and the acoustic barrier layer comprises an adhesive.18. A disk drive as defined in claim 1, wherein the acoustic damping assembly comprises a clearance opening adapted to allow passage of a connector cable connecting the HDA to the PCBA.19. A disk drive comprising:a) a head disk assembly (HDA) comprising a disk drive base;b) a printed circuit board assembly (PCBA) in communication with the HDA; andc) an acoustic damping assembly placed between the disk drive base and the PCBA, wherein the acoustic damping assembly comprises:a compressible acoustic absorption layer having a major surface wherein the compressible acoustic absorption layer is characterized by an unconstrained thickness d1;an acoustic barrier layer; andmeans for fixing the major surface and the acoustic barrier layer in a stacked relationship; andd) means for securing the acoustic damping assembly in between the disk drive base and the PCBA such that the compressible acoustic absorption layer is compressed to a thickness of less than d1.20. A disk drive as defined in claim 19, wherein the acoustic damping assembly substantially covers the PCBA.21. A disk drive as defined in claim 19, wherein the compressed thickness is approximately 0.60(d1).22. A disk drive as defined in claim 19, wherein the acoustic barrier layer is of a denser composition than the acoustic absorption layer.23. A disk drive as defined in claim 22, wherein the acoustic barrier layer is of a consistent density and the acoustic absorption layer is of a substantially inconsistent density.24. A disk drive as defined in claim 23, wherein the acoustic barrier layer is placed between the acoustic absorption layer and the PCBA.25. A disk drive as defined in claim 24, wherein the acoustic barrier layer comprises:a first barrier layer placed in between the acoustic absorption layer and a second barrier layer, wherein the second barrier layer is placed in between the first barrier layer and the PCBA; andmeans for fixing the first and second barrier layers in a stacked relationship.26. A disk drive as defined in claim 25, wherein the second barrier layer comprises a dielectric composition.27. A disk drive as defined in claim 23, wherein the acoustic barrier layer is placed between the acoustic absorption layer and the disk drive base.28. A disk drive as defined in claim 19, wherein the compressible acoustic absorption layer comprise a compressible foam composition.29. A disk drive as defined in claim 28 wherein the foam composition comprises at least one of an open cell type, a closed cell type, a semi-open cell type and a semi-closed cell type.30. A disk drive as defined in claim 28, wherein the foam composition comprises at least one of a polyvinylchloride foam, a polyethylene foam and a polyurethane foam.31. A disk drive as defined in claim 19, wherein the means for fixing the major surface and the acoustic barrier layer comprises an adhesive.32. A disk drive as defined in claim 19, wherein the means for securing the acoustic damping assembly in between the disk drive base and the PCBA is at least one fastener fixing the PCBA to the disk drive base.33. A disk drive as defined in claim 32, wherein the fastener is a screw.34. A disk drive as defined in claim 19, wherein the unconstrained thickness is approximately 0.15 inches.
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