Publication
IEEE Transactions on Magnetics
Paper
Bump formation and growth by multiple laser pulses on Ni-P disk substrate
Abstract
Multiple pulse exposure provides a means for making bumps in the 1-100 nm height range on Ni-P substrates. Although the bump height is generally a nonlinear function of the number of pulses, below the fluencc threshold for chemicapillary effects, bump height increases linearly with the number of pulses. At low fluencc levels, when the peak melt temperature is below 1400 °K, the bump surface becomes rough. Avoiding the low fluence regime, this technique can be reliably used for making smooth bumps with flexible shapes and sizes which are useful for tribology studies. ©1998 IEEE.