Patent Number: 6,297,910

Title: Laser-texturing data zone on a magnetic disk surface by using degenerative two wave mixing

Abstract: A laser-optical wave mixing technique is provided for forming a high density textured data zone in an efficient and accurate manner. A single coherent laser beam of wavelength .lambda. is split into two beams with roughly the same intensity. These two beams are then overlapped with a cross angle of 2.theta. and focused at the disk surface, resulting in an intensity grating thereon. The intensity grating creates a wave-form pattern consisting of a series of high-energy laser beam lines that will heat the target surface and make surface topographical changes accordingly.

Inventors: Xuan; Jialuo Jack (Milpitas, CA), Pan; Zhengda (Newark, CA), Shih; Chung-Yuang (Cupertino, CA)

Assignee: Seagate Technology LLC

International Classification: B23K 26/06 (20060101); B23K 26/067 (20060101); G02B 27/14 (20060101); G02B 027/10 ()

Expiration Date: 10/02/2018