Abstract:
A flexible printed circuit board has a flexible dynamic region, and relatively rigid static regions between which the dynamic region extends. Portions of a base layer, a patterned conductive layer extending on the base layer, and a cover layer covering the conductive layer make up the dynamic region. Extensions of the base layer, the conductive layer, and the cover layer, and portions of a metal layer to which the base layer is attached make up each of the static regions. The metal layer enhances the rigidity of the flexible printed circuit board at the static regions. The metal layer also has rounded corners at sides of each of the boundaries between the dynamic region and each of the static regions to minimize stress concentrations at the boundaries. The conductive layer is made up of real traces through which electrical signals are transmitted, and dummy traces. The dummy traces are disposed outwardly of the real traces to prevent the flexible printed circuit board from cracking at the boundaries between the dynamic region and each of the static regions. In an HDD, the flexible printed circuit board electrically connects a head stack assembly (HSA) and a main circuit board.
Abstract:
A flexible printed circuit including an interior insulation layer, a first conductive layer formed on a surface of the interior insulation layer in a circuit pattern, a first exterior insulation layer deposited to cover the surface of the interior insulation layer and the first conductive layer, a second conductive layer formed on the other surface of the interior insulation layer in a circuit pattern, and a second exterior insulation layer deposited to cover the other surface of the interior insulation layer and the second conductive layer. The flexible printed circuit is manufactured by depositing an interior insulation layer on a base layer, forming a first conductive layer on a surface of the interior insulation layer in a circuit pattern, depositing a first exterior insulation layer to cover the surface of the interior insulation layer and the first conductive layer, removing the base layer, forming a second conductive layer on another surface of the interior insulation layer in a circuit pattern, and depositing a second exterior insulation layer to cover the another surface of the interior insulation layer and the second conductive layer.
Abstract:
A method and an apparatus to control a disc drive, and more particularly, a method and an apparatus to control a disc drive using an indirectly determined counter-electromotive force. The method of controlling the disc drive using a counter-electromotive force includes determining a change in a servo parameter of the disc drive; and controlling the disc drive based on the determined change.
Abstract:
A head stack assembly (HSA) protecting member to be installed in the HSA to protect the HSA, and a method of installing the HSA in a hard disk drive (HDD) by using the HSA protecting member are provided. The HSA protecting member includes a first spacer which is interposed between front ends of a pair of suspensions on which a pair of sliders facing each other are mounted, respectively, and which projects to prevent both front ends of the suspensions from contacting each other; a pair of limiters formed above and below the first spacer, such that the front ends of the pair of suspensions can be inserted into the suspension receiving portions, respectively, to restrain the front ends of the suspensions from shaking up and down; and an installation pin formed opposite the first spacer and the limiters and inserted into the HSA.
Abstract:
A broadcasting signal recording/playing system and method are provided, including a storage apparatus which stores a broadcasting signal therein; a playing apparatus which processes the broadcasting signal and outputs it; and a broadcasting signal tuning apparatus which has a broadcasting signal tuning unit to tune the broadcasting signal, and a recording/playing controller to output a control signal and the broadcasting signal according to a predetermined recording/playing signal to at least one of the storage apparatus and the playing apparatus if the broadcasting signal is received and the predetermined recording/playing signal is supplied. Thus, A broadcasting signal recording/playing system in which a broadcasting tuning apparatus having a broadcasting signal tuner controls respective apparatuses if apparatuses which record and play a broadcasting signal are divided, a broadcasting signal recording/playing apparatus and a broadcasting signal tuning apparatus are provided.
Abstract:
A head stack assembly (HSA) protecting member to be installed in the HSA to protect the HSA, and a method of installing the HSA in a hard disk drive (HDD) by using the HSA protecting member are provided. The HSA protecting member includes a first spacer which is interposed between front ends of a pair of suspensions on which a pair of sliders facing each other are mounted, respectively, and which projects to prevent both front ends of the suspensions from contacting each other; a pair of limiters formed above and below the first spacer, such that the front ends of the pair of suspensions can be inserted into the suspension receiving portions, respectively, to restrain the front ends of the suspensions from shaking up and down; and an installation pin formed opposite the first spacer and the limiters and inserted into the HSA.
Abstract:
A method and apparatus for controlling a rotation of a motor in a disk drive. The method includes: performing spin-up when the disk drive is operating and determining whether a disk rotation speed is less than predetermined target constant revolutions per minute (RPM); rotating a disk at predetermined low RPM when determining that the disk drive is at a low temperature and changing a rotation mode to a low-speed rotation mode if it is determined that the disk rotation speed is less than the predetermined target constant RPM; and spinning up the disk to the target constant RPM when determining that the temperature of the disk drive has increased and changing the rotation mode to a high-speed rotation mode if a disk rotation driving current decreases below a predetermined reference current value while the disk is rotating at the low RPM. Accordingly, since spin-up can be normally performed through a step-by-step spin-up process even if a disk drive operates at a very low temperature, a normal operation and reliability of the disk drive can be guaranteed, and an excessive driving current for the normal operation of the disk drive is not required at the very low temperature.