Patent ID: 7697400
Filing Date: 2010-04-13
Classification: G11B

Abstract:
1. An optical pickup for performing data recording and reproduction by using a plurality of light beams of different wavelengths, comprising: a first semiconductor laser for emitting a first light beam having a first wavelength; a second semiconductor laser for emitting a second light beam having a second wavelength which is longer than the first wavelength; a third semiconductor laser for emitting a third light beam having a third wavelength which is longer than the second wavelength; at least one objective lens for converging the first, second, and third light beams; an integrated circuit element for driving the first, second, and third semiconductor lasers based on an external signal, the integrated circuit element being shaped so as to have a rectangular principal face surrounded by four sides, with a plurality of input/output pins being arranged along each side, the plurality of input/output pins including a first pin group connected to the first semiconductor laser, a second pin group connected to the second semiconductor laser, and a third pin group connected to the third semiconductor laser; a wiring structure including a first transmission line for connecting the first pin group of the integrated circuit element to the first semiconductor laser, a second transmission line for connecting the second pin group to the second semiconductor laser, and a third transmission line for connecting the third pin group to the third semiconductor laser; and light detection means for generating an electrical signal in response to at least a portion of the first, second, and third light beams reflected from an optical disk, wherein, of the rectangular principal face of the integrated circuit element, the side along which the first pin group is provided is orthogonal to the side along which the second pin group is provided or to the side along which the third pin group is provided, and the first transmission line is shorter than both of the second and third transmission lines.