Crosstalk Reduction on 6-line Suspension Assembly Interconnect Trace in Head Gimbal Assembly by using Guard Technique

AbstractThe guard technique is proposed by adding the stainless steel at backing layer to reduce the crosstalk on 6 lines suspension assembly interconnect trace (SAIT). The Near-End and Far- End crosstalk coefficients (NEXT and FEXT) are used to analyze the crosstalk on the SAIT in the frequency of 0-20GHz. The finite integration technique (FIT) is used in the simulation based on CST microwave studio. The space between heat and read pairs is modified and guard addition at the space is also varied. From the results, it is found that the varying of space cannot reduce the crosstalk. However, the additional guard can reduce the crosstalk by monitoring the NEXT and FEXT. The lowest crosstalk is at 100% of the space with 100% of guard that can attenuate the noise around 4.7 and 3.2dB for NEXT and FEXT, respectively. The 80% of space with 80% of additional guard has the crosstalk less than or equal to the conventional SAIT. In addition, it can also decrease the dimension of SAIT about 11.87% of the conventional SAIT. Hence, this technique can reduce the crosstalk and can decrease the dimension of the SAIT which is useful for the robustness for future SAIT design