Contemporary Materials I−1 (2010)

Contemporary Materials, I–1 (2010)     Page 74 - 79

UDK 546.26:541.67


B. Tomčik

Institute of Physics, Center for Atomic and Subatomic Physics, Laboratory for Atomic Collision Processes, Pregrevica 118, P.O. Box 68, Serbia


Na­no si­zed di­a­mond-li­ke car­bon (DLC) films do­ped with ni­tro­gen and hydrogen are ma­te­ri­als of cho­i­ce as a mec­ha­ni­cal and cor­ro­sion pro­tec­tion bar­ri­er for mag­ne­tic layer of the com­pu­ter hard disks. Ove­rall thic­kness of a-C:N/a-C:H layer is bellow 2 nm and is usu­ally ac­com­pa­nied by 0.5 nm thin flash layer of Cr. To ob­tain den­se and void-free DLC films, dif­fe­rent pla­sma and ion be­am so­ur­ces ope­ra­ted with hydrocarbon ga­ses are now re­pla­cing sput­te­ring de­po­si­tion tec­hni­qu­es. For the film charac­te­ri­za­tion, ma­inly used are non-de­struc­ti­ve op­ti­cal tec­hni­qu­es li­ke mic­ro-Raman spec­tro­scopy and op­ti­cal sur­fa­ce analysis. Va­ri­o­us elec­troc­he­mi­cal and bu­si­ness environmen­tal tests are com­mon for the cor­ro­sion pro­tec­tion eva­lu­a­tion. Ca­pa­bi­li­ti­es of the Ruther­ford back-scat­te­ring spec­tro­scopy ha­ve been de­mon­stra­ted in re­ve­a­ling the cobalt migration from the mag­ne­tic layer. In­cor­po­ra­tion of the tri­bo­logy layer in­to the mag­ne­tic layer, eit­her oxi­de, car­bi­de or ni­tri­de-ba­sed, and im­pro­ve­ment of the lu­bri­cant pro­per­ti­es, are the main de­ve­lop­men­tal area in the mo­dern hard disk dri­ve struc­tu­res.

Keywords: Diamondlike carbon, nanohardness, corrosion protection, micro-Raman.

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