Copper gimbal and gimbal damping for integrated lead suspension
View Patent ↗Flexure leg designs for a gimbal structure in an integrated lead suspension (ILS) in a disk drive system are disclosed. In one design, the flexure leg may include a first conducting layer comprising copper, a second conducting layer comprising copper, and a dielectric layer comprising a polymer disposed between the first conducting layer and the second conducting layer. In one aspect, the first conducting layer and the dielectric layer may include a channel extending therethrough. The channel separates the first conducting layer and the dielectric layer into two regions separated from each other by the channel. The channel does not extend through the second conducting layer. In another aspect, the gimbal structure may include a dimple structure separated from a slider by layers of copper and polyimide, with the polyimide layer being formed in direct contact with the dimple structure.
1. A flexure leg for a suspension assembly in a disk drive system, the flexure leg comprising:
a first electrically conducting layer;
a second electrically conducting layer; and
a dielectric layer disposed between the first electrically conducting layer and the second electrically conducting layer;
wherein the flexure leg includes no steel;
wherein the first electrically conducting layer includes a channel extending therethrough, wherein the channel does not extend through the second electrically conducting layer, and wherein the channel separates the first electrically conducting layer into two regions separated from each other by the channel; and
wherein the channel extends through the dielectric material and separates the dielectric material into two regions separated from each other by the channel.
2. A flexure leg as in claim 1 , wherein the material of the first and second electrically conducting layers comprises copper.
3. A flexure leg as in claim 1 , wherein the dielectric material is a polymeric material.
4. A flexure leg as in claim 3 , wherein the polymeric material is polyimide.
5. A flexure leg as in claim 1 , wherein the flexure leg consists of the first electrically conducting layer, the second electrically conducting layer, and the dielectric layer, wherein the first and second electrically conducting layers are each formed from a material comprising copper.
6. A flexure leg as in claim 1 , wherein the flexure leg includes two electrically conducting layers and two dielectric layers, wherein the layers alternate between electrically conducting and dielectric.