摘要:
A substrate for a magnetic recording medium. The substrate is a non-magnetic brittle material having a substantially flat surface on which laser marks having a height in a range of 10-500 .ANG. are formed in a landing zone. The laser marks are formed by irradiating a pulsed laser beam having a wavelength capable of being absorbed in the non-magnetic brittle material within a range of substantially circular form having a waist diameter D .mu.m, and which has a physical property of 0.5
摘要翻译:一种用于磁记录介质的基片。 基板是具有基本上平坦表面的非磁性脆性材料,在着陆区域上形成高度在10-500安培范围内的激光标记。 激光标记是通过将具有能够吸收在非磁性脆性材料中的波长的脉冲激光束照射在具有腰围直径D mu m的基本圆形的范围内而形成的,其物理性质为0.5