Suspension assembly including a dimple that contacts a flexure tongue dielectric layer through a hole in a flexure tongue structural layer
View Patent ↗A suspension assembly includes a load beam having a protruding dimple and a laminate flexure. The laminate flexure includes a structural layer that is attached to the load beam, and a dielectric layer. The laminate flexure includes a flexure tongue for mounting a head. The flexure tongue includes the structural layer and the dielectric layer and a hole that extends through the structural layer but not through the dielectric layer. The dimple contacts the dielectric layer via the hole.
1. A suspension assembly comprising:
a load beam including a protruding dimple; and
a laminate flexure including a structural layer that is attached to the loadbeam, and a dielectric layer, the laminate flexure including a flexure tongue for mounting a head;
wherein the flexure tongue includes the structural layer and the dielectric layer and a hole that extends through the structural layer but not through the diectric layer, and wherein the dimple contacts the dielectric layer via the hole.
2. The suspension assembly of claim 1 wherein the laminate flexure further comprises an electrically conductive layer on a side of the dielectric layer that is opposite the structural layer.
3. The suspension assembly of claim 1 wherein the dielectric layer comprises polyimide and the structural layer comprises stainless steel.
4. The suspension assembly of claim 1 wherein the dimple has a protrusion height in the range 65 to 90 microns.
5. The suspension assembly of claim 1 wherein the hole has a diameter that is at least 260 microns.
6. The suspension assembly of claim 1 wherein the loadbeam comprises stainless steel.
7. The suspension assembly of claim 1 wherein the dielectric layer has a material tensile modulus that is at least 2.5 GPa.
8. A head gimbal assembly (HGA) comprising:
a head including a read transducer;
a load beam including a protruding dimple; and
a laminate flexure including a structural layer that is attached to the loadbeam, and a dielectric layer, the laminate flexure including a flexure tongue on which the head is mounted;
wherein the flexure tongue includes the structural layer and the dielectric layer, and a hole that extends through the structural layer but not through the diectric layer, and wherein the dimple contacts the dielectric layer via the hole.
9. The HGA of claim 8 wherein the laminate flexure further comprises an electrically conductive layer on a side of the dielectric layer that is opposite the structural layer.
10. The HGA of claim 9 wherein the head is in mounted to the flexure tongue in contact with the electrically conductive layer.
11. The HGA of claim 8 wherein the dielectric layer comprises polyimide and the structural layer comprises stainless steel.
12. The HGA of claim 8 wherein the loadbeam comprises stainless steel.
13. The HGA of claim 8 wherein the head is mounted to the flexure tongue in contact with the dielectric layer.
14. The HGA of claim 8 wherein the dimple has a protrusion height in the range 65 to 90 microns.
15. The HGA of claim 8 wherein the hole has a diameter that is at least 260 microns.
16. The HGA of claim 8 wherein the dielectric layer has a material tensile modulus that is at least 2.5 GPa.