Head-gimbal assembly including a flexure tongue with adhesive receptacles disposed adjacent to stand-offs
View Patent ↗A head-gimbal assembly (HGA) is disclosed. The HGA comprises a slider, a flexure that includes a tongue, and an adhesive material bonding the slider to the tongue. The tongue includes a plurality of stand-offs that contact the slider, and a plurality of adhesive receptacles. Each of the plurality of adhesive receptacles is disposed adjacent to a corresponding one of the plurality of stand-offs. At least a portion of each of the plurality of adhesive receptacles is disposed between the adhesive material and a corresponding one of the plurality of stand-offs.
1. A head-gimbal assembly (HGA) comprising:
a slider;
a flexure, the flexure including a tongue; and
an adhesive material that bonds the slider to the tongue, the adhesive material including all adhesive that bonds the slider to the tongue;
wherein the tongue includes a plurality of stand-offs that contact the slider and a plurality of adhesive receptacles, each of the plurality of adhesive receptacles being disposed adjacent to a corresponding one of the plurality of stand-offs, and at least a portion of each of the plurality of adhesive receptacles being disposed between the corresponding one of the plurality of stand-offs and an extent of the adhesive material that is nearest to the corresponding one of the plurality of stand-offs; and
wherein the plurality of adhesive receptacles includes at least one formed depression in the tongue.
2. A head-gimbal assembly (HGA) comprising:
a slider;
a flexure, the flexure including a tongue; and
an adhesive material that bonds the slider to the tongue, the adhesive material including all adhesive that bonds the slider to the tongue;
wherein the tongue includes a plurality of stand-offs that contact the slider and a plurality of adhesive receptacles, each of the plurality of adhesive receptacles being disposed adjacent to a corresponding one of the plurality of stand-offs, and at least a portion of each of the plurality of adhesive receptacles being disposed between the corresponding one of the plurality of stand-offs and an extent of the adhesive material that is nearest to the corresponding one of the plurality of stand-offs; and
wherein the plurality of adhesive receptacles includes at least one partially-etched depression in the tongue.
3. The HGA of claim 2 wherein the at least one partially-etched depression has a depth between 10 microns and 25 microns.
4. The HGA of claim 2 wherein the adhesive material comprises a material that is sensitive to ultraviolet light before it is cured.
5. The HGA of claim 2 wherein the adhesive material comprises a material selected from the group consisting of an epoxy material and a cyanoacrylate material.
6. The HGA of claim 2 wherein the plurality of stand-offs includes a dielectric material.
7. The HGA of claim 6 wherein the dielectric material comprises polyimide.
8. The HGA of claim 2 wherein each of the plurality of stand-offs comprises a dielectric layer and a conductive layer.
9. The HGA of claim 8 wherein the conductive layer comprises copper.
10. The HGA of claim 8 wherein the dielectric layer has a thickness in the range 4 microns to 15 microns.
11. The HGA of claim 8 wherein the conductive layer has a thickness in the range 4 microns to 20 microns.
12. The HGA of claim 2 wherein each of the plurality of stand-offs has a height in the range 4 microns to 35 microns.
13. The HGA of claim 2 wherein the slider is not bonded to the tongue at the plurality of adhesive receptacles.