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HDD Shipping Box Packaging Design

IP.com Disclosure Number: IPCOM000204385D
Publication Date: 2011-Feb-22
Document File: 2 page(s) / 118K

Publishing Venue

The IP.com Prior Art Database

Abstract

The top disk of a hard disk drive (HDD) has hard error due to disk to cover contact during shipping handling. The disk to cover contact occurs at the horse shoe recess on the cover. Recently, the disk/cover clearance is increased by reducing the horse shoe recess depth by 0.2 mm, whereby the failure rate is reduced but disk to cover contact may still occur. The disclosed solution to this problem modifies the packaging design, such that the cover compression during handling can be significantly reduced.

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HDD Shipping Box Packaging Design

When the shipping box is dropped, there are two gap reduction components that lead to HDD failure due to disk to cover contact:
(1) disk and cover deformation under shock pulses, which equals to 0.597 um / G; and
(2) cover deformation due to HDD and packaging impact, which equals to 0.455 um / G.

Disk and cover deformation is un-avoidable due to HDD design. Cover deflection due to packaging impact compression accounts for 43% of the total gap reduction between disk and cover. The disclosed solution depicted in Figure 3 tries to reduce the cover deformation due to HDD and packaging impact by using a different shipping box packaging design which removes packaging material from inner areas.

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Figure 1. Disk, cover displacement and disk/cover gap change

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Figure 2. HDD and POR package deformation under shock

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Page 02 of 2

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Figure 3. HDD and an improved package deformation under shock

Disclosed by Hitachi Corporation

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