Abstract: Metal is locally heated to a predetermined temperature within a predetermined time. A laser annealing apparatus forms a line beam at a focusing position in a heatable area on a workpiece by an optical system, which has a long and narrow shape having a width of 0.5 ?m all to 20 ?m in the short direction and a long width of 6 ?m to 200 ?m in the length direction and has a depth of focus in the range of 2 ?m to 4 ?m, by using a semiconductor laser element that generates laser light, while moving a movable stage on which the workpiece has been mounted in an X direction and a Y direction; and selectively performs a heating step of performing laser annealing while controlling focusing and second laser power that has an output lower than the output of first laser power in the unheatable area on the workpiece.

Abstract: An optical disc manufacturing apparatus (46) recording a BCA code constituted by plural marks and including a secret code which is modulated in a range capable of recognizing a position in a radial direction of an optical disc and/or a position in a track direction of the plural marks as the BCA code, a BCA history database (44) storing a history including a correspondence between the BCA code of an optical disc (1a) recording the BCA code and the secret code, and a management center (30) reading the BCA code and the secret code recorded on the optical disc so as to compare both on the basis of input of the correspondence between the BCA code and the secret code stored in the BCA history database (44) are employed, whereby an illegally manufactured optical disc (1z) can be easily found by inspecting the recorded BCA code and secret code.

Abstract: An optical disc manufacturing apparatus (46) recording a BCA code constituted by plural marks and including a secret code which is modulated in a range capable of recognizing a position in a radial direction of an optical disc and/or a position in a track direction of the plural marks as the BCA code, a BCA history database (44) storing a history including a correspondence between the BCA code of an optical disc (1a) recording the BCA code and the secret code, and a management center (30) reading the BCA code and the secret code recorded on the optical disc so as to compare both on the basis of input of the correspondence between the BCA code and the secret code stored in the BCA history database (44) are employed, whereby an illegally manufactured optical disc (1z) can be easily found by inspecting the recorded BCA code and secret code.

Abstract: An optical disc manufacturing apparatus (46) recording a BCA code constituted by plural marks and including a secret code which is modulated in a range capable of recognizing a position in a radial direction of an optical disc and/or a position in a track direction of the plural marks as the BCA code, a BCA history database (44) storing a history including a correspondence between the BCA code of an optical disc (1a) recording the BCA code and the secret code, and a management center (30) reading the BCA code and the secret code recorded on the optical disc so as to compare both on the basis of input of the correspondence between the BCA code and the secret code stored in the BCA history database (44) are employed, whereby an illegally manufactured optical disc (1z) can be easily found by inspecting the recorded BCA code and secret code.