Patent Application
20090086421
1. Field of the Invention
The invention generally relates to a hard disk drive electromagnetic interference shield for a blade server.
2. Background Art
A blade server module designed by Sun Microsystems, Inc. is shown in
In one or more embodiments of the present invention, an electromagnetic interference shield for a hard disk drive comprises a metal shield portion, a plurality of top fingers, bottom fingers, left fingers, and right fingers disposed on four sides of the metal shield portion, and bars tying the tips of the plurality of top fingers together, the tips of the plurality of bottom fingers together, the tips of the plurality of right fingers together, and the tips of the plurality of left fingers together. Each of the plurality of top fingers and bottom fingers are wider than each of the plurality of left fingers and right fingers. Each of the plurality of top fingers, bottom fingers, left fingers, and right fingers has a perpendicular jog at a base portion thereof.
In one or more embodiments of the present invention, a hard disk drive bracket comprises a front bezel, a back bracket disposed behind the front bezel, a hard disk drive disposed in the back bracket, and an electromagnetic interference shield disposed between the front bezel and the back bracket. The electromagnetic interference shield comprises a metal shield portion, a plurality of top fingers, bottom fingers, left fingers, and right fingers disposed on four sides of the metal shield portion, and bars tying the tips of the plurality of top fingers together, the tips of the plurality of bottom fingers together, the tips of the plurality of right fingers together, and the tips of the plurality of left fingers together. Each of the plurality of top fingers and bottom fingers are wider than each of the plurality of left fingers and right fingers. Each of the plurality of top fingers, bottom fingers, left fingers, and right fingers has a perpendicular jog at a base portion thereof.
Other aspects and advantages of the invention will be apparent from the following description and the appended claims.
Exemplary embodiments of the invention will be described with reference to the accompanying figures. Like items in the figures are shown with the same reference numbers.
In embodiments of the invention, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to one of ordinary skill in the art that the invention may be practiced without these specific details. In other instances, well-known features have not been described in detail to avoid obscuring the invention.
Embodiments of the invention relate to a hard disk drive (“HDD”) electromagnetic interference (“EMI”) shield. More specifically, one or more embodiments of the invention relate to a fine-pitch, splay-resistant, and finger-to-finger contact-capable HDD EMI shield.
The top fingers 101, bottom fingers 107, left fingers 103, and right fingers 109 are connected by thin bars 102, 108, 104, 110 at the tip end of the top fingers 101. Each of the top fingers 101, bottom fingers 107, left fingers 103, and right fingers 109 are curved towards the metal shield 105, and has a substantially perpendicular jog 111 as each finger extends from the metal shield 105. The perpendicular shape of the jog 111 has the advantage of, for example, preventing splaying. On one side of the HDD EMI shield 100 are disposed apertures 112 for indicator lights, e.g., light emitted diodes or light pipes, to pass through.
In one or more embodiments of the present invention, the metal shield 105 may be tin plated. In one or more embodiments of the present invention, may be manufactured from beryllium copper or recyclable clean copper. In one or more embodiments, the HDD EMI shield is manufactured from a 0.07 mm thick material.
The front bezel 130 includes a bezel main body 131, latch door 135, and latch 134. When the HDD bracket 20 is disposed inside a blade server module 15 or a computer server rack 10, the 134 secures the HDD bracket 20 by latching onto an inside surface of the server module 15 or the computer server rack 10. When a release button disposed on the front surface of the front bezel 31 is pressed, the latch door 35 swings outward, and the latch 37, which is part of the latch door 35, swings inward and the HDD bracket 20 is disengaged from the blade server module 15 or the computer server rack 10. The bezel main body 131 has sloped depressions 133 on which the top fingers 101, bottom fingers 107, left fingers 103, and right fingers 109 are disposed. The top fingers 101, bottom fingers 107, left fingers 103, and right fingers 109 effectively clamp the HDD EMI shield 100 onto the bezel main body 131 of the front bezel 130. The right fingers 109 and the corresponding sloped depressions 133 are shorter to allow for the latch 134 to swing inwards.
One or more embodiments of the present invention have one or more of the following advantages. Finger-to-finger contact is allowed between HDD EMI shields 100 of HDD brackets 20 mounted on each other. Thus, the HDD brackets 20 can be mounted close together, resulting in improved storage density, while maintaining necessary HDD EMI shield finger robustness. Stronger HDD EMI shield fingers can be provided, which improves resistance to handling and insertion damage. Close-pitch placement of HDD brackets is enabled. A larger contact area between the fingers and the front bezel 130 is provided.
While the invention has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that other embodiments can be devised which do not depart from the scope of the invention as disclosed herein. Accordingly, the scope of the invention should be limited only by the attached claims.
