本文叙述了光刻伺服盘采用分离磁道刻写方法对信噪比的影响，该方法在磁盘记录区采用导磁材料，非记录区采用非导磁材料。这样一种非连续的记录磁介质，有利于道密度的提高，增大了磁盘信息存储容量，减少了道间串扰，提高了磁头读出的信噪比［以Ｓ／Ｎ表示］。 This paper describes the impact of the lithography servo disc using separate track writing method on the signal to noise ratio, the method using magnetic material in the recording area of ​​the disk, the non-recording area using non-magnetic material. Such a discontinuous recording medium is advantageous for improving the track density, increasing the storage capacity of disk information, reducing the crosstalk between tracks, and improving the S / N ratio of the read head of the magnetic head.