Noise Reduction in CoCrPt Media with a CoCrZr Seed Layer.

MgO seed layers for CoCrPt/Cr longitudinal magnetic recording media

Sputter deposited MgO thin films with the B1 crystal structure and ~002! film texture are used as seed layers to improve the texture and magnetic properties of the CoCrPt/Cr magnetic thin films on glass substrates for longitudinal recording. The desired ~002! textured Cr underlayers are usually obtained by sputtering Cr onto heated substrates. However, it is found that the MgO seed layers can i...

Magnetic interactions in CoCrPt-oxide based perpendicular magnetic recording media

A Phase Noise Reduction Technique in LC Cross-coupled Oscillators with Adjusting Transistors Operating Regions

In this paper, an intuitive analysis of a phase noise reduction technique is done, and then a modified structure is proposed to achieve higher phase noise reduction than the original one. This method reduces the impact of noise sources on the phase noise by decreasing closed-loop gain in zero-crossings points and moving this high closed-loop gain to the non-zero-crossings points. This reduction...

Influence of stress on nucleation field of CoCrPt perpendicular media

The influence of stress on the nucleation field was investigated for CoCrPt perpendicular media grown on a Ta/Hf buffer layer. The nucleation field increased to 21.5 kOe ~second quadrant! following postdeposition annealing of a sample at 232 °C in air for 1 h. The residual in-plane stress for the annealed film was tensile, and in-plane x-ray diffraction showed that the a0 lattice parameter incr...

Seed - layer deposition Patterning Insulator deposition and patterning Seed - layer deposition Seed layer Substrate

Damascene Cu electroplating for on-chip metallization, which we conceived and developed in the early 199Os, has been central to IBM's Cu chip interconnection technology. We review here the challenges of filling trenches and vias with Cu without creating a void or seam, and the discovery that electrodeposition can be engineered to give filling performance significantly better than that achievabl...