Method and apparatus for reducing crosstalk and signal loss in flexing interconnects of an electrical lead suspension

A method for obtaining low crosstalk and signal loss in a flexing interconnect, said method comprising:

• providing a laminate;
• supporting a plurality of read traces above a first serpentine pattern of dual serpentine patterns above at least a hinged area of an electrical lead suspension, said first serpentine pattern formed of said laminate;
• and
• supporting a plurality of write traces above a second serpentine pattern of said dual serpentine patterns above said at least said hinged area of said electrical lead suspension, said second serpentine pattern formed of a base metal layer of said laminate, wherein said second serpentine pattern is separated from said first serpentine pattern, and wherein said separated nature and said serpentine pattern of said base-metal layer under said plurality of write traces and said plurality of read traces reduces write-to-read crosstalk and signal loss.

A hard disk drive comprising:

• a housing;
• a disk pack mounted to the housing and having a plurality of disks that are rotatable relative to the housing, the disk pack defining an axis of rotation and a radial direction relative to the axis, and the disk pack having a downstream side wherein air flows away from the disks, and an upstream side wherein air flows toward the disk;
• an actuator mounted to the housing and being movable relative to the disk pack, the actuator having a plurality of heads for reading data from and writing data to the disks;
• and
• a flexing interconnect of an electrical lead suspension, said electrical lead suspension coupled to said actuator, and said flexing interconnect comprising:
• a laminate;
• a plurality of read traces formed of said laminate;
• a plurality of write traces formed of said laminate;
• and
• dual serpentine patterns formed of a layer of said laminate, a first of said dual serpentine patterns separated from a second of said dual serpentine patterns, said first of said dual serpentine patterns supporting said plurality of read traces and said second of said dual serpentine patterns supporting said plurality of write traces above at least a hinge area of said electrical lead suspension, wherein said supporting said plurality of write traces separate from said plurality of read traces reduces write-to-read crosstalk and signal loss.

A flexing interconnect in an electrical lead suspension comprising:

• laminate means for providing support to attached devices;
• a plurality of read traces means in a formed layer of said laminate for transmitting read signals;
• a plurality of write traces means in a formed layer of said laminate for transmitting write signals;
• and
• dual serpentine pattern means in a formed layer of said laminate, a first of said dual serpentine patterns separated from a second of said dual serpentine patterns, said first of said dual serpentine pattern means for supporting said plurality of read traces means and said second of said dual serpentine pattern means for supporting said plurality of write traces means above at least a hinge area of said electrical lead suspension, wherein said supporting said plurality of write traces means separate from said plurality of read traces means reduces write-to-read crosstalk and signal loss.