Magnetic disk comprising a first carbon overcoat having a high SP3 content and a second carbon overcoat having a low SP3 content
A method for making a magnetic disk comprises forming first and second protective carbon layers on a magnetic layer. The first protective carbon layer is predominantly SP3 carbon. The second protective carbon layer comprises about 50% or less SP3 carbon. The second protective carbon layer is very thin, e.g. between 0.1 and 1.0 nm thick. A lubricant layer (e.g. a perfluoropolyether lubricant) is applied to the second protective carbon layer. The second protective carbon layer facilitates improved cooperation between lubricant and the disk.
Komag, Inc.
Y Y G G C Y C G
Y10T Y10T G11B G11B C23C Y10T C23C G11B
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Ching Jackie Tsutomu Tom Eric Woo Hock Shigeto Wen Bruce
Tsoi Yamashita Yong Hashimoto Liu Lairson