Hard disk drive and wireless data terminal using the same
AssigneeTDK Corporation
InventorsToshikazu Endo, Kenichi Kawabata
Life of this patent
Estimating the term…
Abstract
A hard disk drive is provided with a platter, a spindle motor for driving the platter, an arm with a magnetic head attached to a distal end thereof, a voice coil motor for driving the arm, a first circuit substrate, and a drive casing for accommodating and electrically shielding the platter, spindle motor, arm, voice coil motor, and first circuit substrate. The first circuit substrate has a multilayer substrate, a plurality of digital ICs that are embedded as bare chips in the multilayer substrate, and a bus line for connecting the digital ICs. The digital ICs are disposed in a mutually horizontal configuration.
Claims21
A hard disk drive comprising:
- a platter;
- a spindle motor for driving the platter;
- an arm with a magnetic head attached to a distal end thereof;
- a voice coil motor for driving the arm;
- a first circuit substrate;
- and
- a drive casing for accommodating and electrically shielding the platter, spindle motor, arm, voice coil motor, and first circuit substrate, wherein
- the first circuit substrate has a multilayer substrate, a plurality of digital ICs that are embedded as bare chips in the multilayer substrate, and a bus line for connecting the digital ICs;
- first and second ground layers for respectively covering the top and bottom of a bus line;
- and
- the digital ICs are disposed in a mutually horizontal configuration.
A hard disk drive, comprising:
- a platter;
- a spindle motor for driving the platter;
- an arm with a magnetic head attached to a distal end thereof;
- a voice coil motor for driving the arm;
- a first circuit substrate;
- and
- a drive casing for accommodating and electrically shielding the platter, spindle motor, arm, voice coil motor, and first circuit substrate, wherein
- the first circuit substrate has a multilayer substrate, a plurality of digital ICs that are embedded as bare chips in the multilayer substrate, and a bus line for connecting the digital ICs;
- a shielding member disposed in a region between a digital circuit region having the digital ICs, and an analog circuit region provided to the same layer as the digital circuit region;
- and
- the digital ICs are disposed in a mutually horizontal configuration.
A wireless data terminal comprising:
- at least an antenna;
- an RF component connected to the antenna;
- a baseband component connected to the RF component;
- a hard disk drive, comprising:
- a platter;
- a spindle motor for driving the platter;
- an arm with a magnetic head attached to a distal end thereof;
- a voice coil motor for driving the arm;
- a first circuit substrate;
- and
- a drive casing for accommodating and electrically shielding the platter, spindle motor, arm, voice coil motor, and first circuit substrate, wherein
- the first circuit substrate has a multilayer substrate, a plurality of digital ICs that are embedded as bare chips in the multilayer substrate, and a bus line for connecting the digital ICs;
- and
- the digital ICs are disposed in a mutually horizontal configuration;
- and
- a terminal casing for accommodating the RF component, the baseband component, and the hard disk drive, wherein the hard disk drive further has a second circuit substrate that is provided to the external surface of the terminal casing and is electrically connected to the first circuit substrate;
- and
- a shielding member for covering the exposed surface of the second circuit substrate, and wherein
- at least the baseband component is formed on the second circuit substrate.
Dependencies are inferred from the claim text.