Windowing and Groove Depth Variation Techniques for Crosstalk Reduction on Six-Line Suspension Assembly Interconnect Trace in Magnetic Recording Heads

Windowing and groove depth variation techniques are proposed for crosstalk reduction in a 6-line suspension assembly interconnect trace of the head gimbal assembly in magnetic recording heads. The near-end and far-end crosstalk coefficients, NEXT and FEXT, are used for the analysis of crosstalk reduction between the write or heat trace and the read line for frequencies in the range 0-20 GHz. A finite integration technique is used for the simulation. By using the heat trace as a source, a maximum reduction of NEXT is 35.71 dB at 1.88 GHz for 100% of the groove depth and 70% of the windowing, and a maximum reduction of FEXT is 30.99 dB at 13.93 GHz for 100% of the groove depth and 57% of the windowing. Thus, windowing and groove depth variation techniques can significantly reduce crosstalk, resulting in improvement of read/write performance in 6-line suspension assembly interconnect traces in magnetic recording heads.