Abstract: A fluxgate sensor is integrated in a printed circuit board. The fluxgate sensor has two bar-type (or rectangular-ring shaped) soft magnetic cores to form a closed magnetic path on a printed circuit board and an excitation coil in the form of a metal film is wound around the two bar-type soft magnetic cores either in a united structure that winds the two bar-type soft magnetic cores altogether, or in a separated structure that winds the two bar-type soft magnetic cores respectively, both in a pattern of number ‘8’. A pick-up coil is mounted on the excitation coil, either winding the two bars altogether, or respectively, in a solenoid pattern. The fluxgate sensor integrated in the printed circuit board can be mass-produced at a cheap manufacturing cost. The fluxgate sensor also can be made compact-sized, and at the same time, is capable of forming a closed-magnetic path.

Abstract: A fluxgate sensor is integrated in a printed circuit board. The fluxgate sensor has two bar-type (or rectangular-ring shaped) soft magnetic cores to form a closed magnetic path on a printed circuit board and an excitation coil in the form of a metal film is wound around the two bar-type soft magnetic cores either in a united structure that winds the two bar-type soft magnetic cores altogether, or in a separated structure that winds the two bar-type soft magnetic cores respectively, both in a pattern of number ‘8’. A pick-up coil is mounted on the excitation coil, either winding the two bars altogether, or respectively, in a solenoid pattern. The fluxgate sensor integrated in the printed circuit board can be mass-produced at a cheap manufacturing cost. The fluxgate sensor also can be made compact-sized, and at the same time, is capable of forming a closed-magnetic path.

Abstract: A fluxgate sensor is integrated in a printed circuit board. The fluxgate sensor has two bar-type(or rectangular-ring shaped) soft magnetic cores to form a closed magnetic path on a printed circuit board and an excitation coil in the form of a metal film is wound around the two bar-type soft magnetic cores either in a united structure that winds the two bar-type soft magnetic cores altogether, or in a separated structure that winds the two bar-type soft magnetic cores respectively, both in a pattern of number ‘8’. A pick-up coil is mounted on the excitation coil, either winding the two bars altogether, or respectively, in a solenoid pattern. The fluxgate sensor integrated in the printed circuit board can be mass-produced at a cheap manufacturing cost. The fluxgate sensor also can be made compact-sized, and at the same time, is capable of forming a closed-magnetic path.

Abstract: A fluxgate sensor integrated in a printed circuit board. The fluxgate sensor has soft magnetic cores having a lower core and an upper core mounted on the lower core, for forming a closed magnetic path on a printed circuit board, an excitation coil formed as a metal film, alternately winding the upper and the lower soft magnetic cores substantially in a number ‘8’ pattern, and a pick-up coil formed as a metal film, having a structure of winding the upper and the lower soft magnetic cores substantially in a solenoid pattern, the pick-up coil being placed on the same plane as an external contour of the excitation coil.

Abstract: A fluxgate sensor integrated in a printed circuit board. The fluxgate sensor has soft magnetic cores having a lower core and an upper core mounted on the lower core, for forming a closed magnetic path on a printed circuit board, an excitation coil formed as a metal film, alternately winding the upper and the lower soft magnetic cores substantially in a number ‘8’ pattern, and a pick-up coil formed as a metal film, having a structure of winding the upper and the lower soft magnetic cores substantially in a solenoid pattern, the pick-up coil being placed on the same plane as an external contour of the excitation coil.

Abstract: A fluxgate sensor integrated in a printed circuit board. The fluxgate sensor has soft magnetic cores having a lower core and an upper core mounted on the lower core, for forming a closed magnetic path on a printed circuit board, an excitation coil formed as a metal film, alternately winding the upper and the lower soft magnetic cores substantially in a number ‘8’ pattern, and a pick-up coil formed as a metal film, having a structure of winding the upper and the lower soft magnetic cores substantially in a solenoid pattern, the pick-up coil being placed on the same plane as an external contour of the excitation coil.

Abstract: A side-bonding method of a flip-chip semiconductor device, a MEMS device package and a package method using the same, in which firm bonding and insensitivity to surface roughness may be obtained, include forming a UBM on a bonding line of a lower substrate having a semiconductor device formed thereon, plating solder on the UBM on the lower substrate, forming a trench in the upper substrate to contact the lower substrate at a location corresponding to a location of the solder and forming a second UBM in the trench, coupling the upper substrate and the lower substrate by inserting the solder into the trench, and heating the upper substrate and the lower substrate at a temperature higher than a melting point of the solder so that the solder is wetted toward sides of the trench to bond the upper substrate and the lower substrate.

Abstract: A side-bonding method of a flip-chip semiconductor device, a MEMS device package and a package method using the same, in which firm bonding and insensitivity to surface roughness may be obtained, include forming a UBM on a bonding line of a lower substrate having a semiconductor device formed thereon, plating solder on the UBM on the lower substrate, forming a trench in the upper substrate to contact the lower substrate at a location corresponding to a location of the solder and forming a second UBM in the trench, coupling the upper substrate and the lower substrate by inserting the solder into the trench, and heating the upper substrate and the lower substrate at a temperature higher than a melting point of the solder so that the solder is wetted toward sides of the trench to bond the upper substrate and the lower substrate.

Abstract: A fluxgate sensor integrated in a printed circuit board. The fluxgate sensor has soft magnetic cores having a lower core and an upper core mounted on the lower core, for forming a closed magnetic path on a printed circuit board, an excitation coil formed as a metal film, alternately winding the upper and the lower soft magnetic cores substantially in a number ‘8’ pattern, and a pick-up coil formed as a metal film, having a structure of winding the upper and the lower soft magnetic cores substantially in a solenoid pattern, the pickup coil being placed on the same plane as an external contour of the excitation coil.

Abstract: A fluxgate sensor is integrated in a printed circuit board. The fluxgate sensor has two bar-type(or rectangular-ring shaped) soft magnetic cores to form a closed magnetic path on a printed circuit board and an excitation coil in the form of a metal film is wound around the two bar-type soft magnetic cores either in a united structure that winds the two bar-type soft magnetic cores altogether, or in a separated structure that winds the two bar-type soft magnetic cores respectively, both in a pattern of number ‘8’. A pick-up coil is mounted on the excitation coil, either winding the two bars altogether, or respectively, in a solenoid pattern. The fluxgate sensor integrated in the printed circuit board can be mass-produced at a cheap manufacturing cost. The fluxgate sensor also can be made compact-sized, and at the same time, is capable of forming a closed-magnetic path.

Abstract: A signal transfer apparatus of a computer. The signal transfer apparatus includes a substrate installed in a main system frame of the computer, a driving device installed on the substrate, for converting a video signal into a current signal, a semiconductor laser array for emitting light corresponding to the current signal from the driving device, an optical fiber bundle for transferring the light emitted from the semiconductor laser array to a display, a photo receiver array for converting the light transferred through the optical fiber bundle into a current signal, and a converter for converting the current signal output from the photo receiver array into a video signal.

Abstract: A projection display system having a projector and a screen. The screen displays an image formed by light projected from the projector and processes user control signals input by a user to transmit the user control signals to the projector. The projector projects light to the screen to form an image thereon according to the user control signals output from the screen.

Abstract: A noise damping device for a rotating body and a disk player is disclosed. The noise damping device for a rotating body is characterized in that inner surfaces of a housing in which the rotating body is installed are provided with an intaglio and/or cameo pattern of a predetermined shape. The pattern guides the air flow within the housing smoothly, and damps noise. Also, the noise damping device for a disk player is characterized in that an intaglio and/or cameo pattern of a predetermined shape is formed on surfaces of a disk tray and/or a clamping member.

Abstract: A scanning unit of a laser printer in which a cover is provided on a scanning motor so that the scanning motor is isolated from an outside and an inner portion of the cover is maintained in a vacuum state, and in which the scanning motor is provided with a magnetic bearing having a repulsive force in thrust and radial directions, and a magnetic bearing apparatus used in the scanning unit, whereby the noise is lowered and the structure of the scanning unit can be simplified.

Abstract: A disk drive includes a first case including a disk, a disk driving unit, a recording/reproducing device, and a recording/reproducing device driving unit, and a second case including a driving circuit to drive and control the recording/reproducing device and the recording/reproducing device driving unit, where the second case is pivotally connected with the first case, and a flexible cable electrically connects the disk driving unit and the recording/reproducing device driving unit with the driving circuit. Accordingly, the thickness of the first case can be increased since only the second case needs to be inserted into a PCMCIA slot, and a PCMCIA card type disk drive with a large storage capacity can be manufactured.

Abstract: A noise damping device of a rotation driving apparatus includes a housing; and at least one rotating disk installed to be rotated by a driving source within the housing. The rotating disk and the housing are assembled to satisfy the following Equation &dgr;m<h<&dgr;m+1.5&dgr;f &dgr;m is the thickness of air layers which move from the rotation center of the rotating disk to the outside thereof and are distributed around the rotating disk when the rotating disk rotates at a normal operating speed. &dgr;f is the thickness of air layers which move from the outside of the rotating disk to the rotation center thereof and are distributed around the upper inside surface and the base surface of the housing, which face the rotating disk. h is the distance between the rotating disk and the upper inside surface or the base surface of the housing.

Abstract: A scanning unit of a laser printer in which a cover is provided on a scanning motor so that the scanning motor is isolated from an outside and an inner portion of the cover is maintained in a vacuum state and in which the scanning motor is provided with a magnetic bearing having a repulsive force in thrust and radial directions, and a magnetic bearing apparatus using in the scanning unit, whereby the noise is lowered and the structure of the scanning unit can be simplified.

Abstract: A noise and vibration damping device of a rotation driving apparatus includes a housing in which a body is rotatably installed, and a driving source that rotates the body. Speed reducing filters are installed on inner surfaces of the housing for reducing the speed of air flow within the housing generated by the rotation of the body.

Abstract: A radiation apparatus of a hard disk drive includes a base frame, a spindle motor installed at the base frame, a hard disk rotatably supported by a rotation shaft of the spindle motor, a cover frame coupled to the base frame and having a hole formed therein, a radiation plate installed at the cover frame and formed of a copper alloy having a thermal conductivity higher than that of the cover frame, and a portion for coupling the rotation shaft and the radiation plate so that driving heat generated by the spindle motor can be directly transferred to the radiation plate.