A tolerance ring having a first axial end, a second axial end, and a central axis, the tolerance ring including an annular band; a plurality of protrusions, all of the plurality of protrusions extending from the annular band; and a guide portion extending from the annular band towards the first axial end of the tolerance ring, where the guide portion includes a guide surface that is curved in an axial section.

A disk-drive suspension includes a load beam, a flexure laid on top of the load beam, a first terminal provided on the flexure, and a first bump arranged on a top surface of the first terminal. The first terminal includes a narrow part having a first width in a first direction and including a center of the first terminal, and a wide part having a second width in the first direction greater than the first width. The wide part and the narrow part are arranged in a second direction intersecting the first direction. The first bump has, at the center, a first height from a bottom surface of the first terminal. The first height is greater than the first width.

A system and methods for manufacturing devices such as flexures using process coupons are described are described. The method including performing a test on at least one feature of a coupon, the coupon is included on an assembly sheet used in manufacturing flexures. The at least one feature is produced by a manufacturing processing step that is used to produce a portion of a flexure. And, the physical characteristics of the feature include at least one physical characteristic that is different than physical characteristics of the portion. The method also including determining the manufacturing processing step will produce an abnormal portion of a flexure based on the performed test. Further, the method includes adjusting the manufacturing processing step and manufacturing a portion of a flexure using the adjusted manufacturing processing step.

Aspects of the present disclosure generally relate to slider assemblies for magnetic heads of magnetic recording devices. In one aspect, a slider assembly for magnetic recording devices includes a slider and an anti-reflection coating (ARC) structure disposed on the slider. The ARC structure includes an outer surface facing away from the slider, and a recess extending into the outer surface to define a recessed surface. The slider assembly includes a soldered structure disposed on the recessed surface and at least partially in the recess of the ARC structure. In one aspect, a method of forming a slider assembly includes forming an anti-reflection coating (ARC) structure on a slider. The ARC structure includes an outer surface facing away from the slider. The method includes forming a recess in the ARC structure, and forming a solder structure on a recessed surface and at least partially in the recess of the ARC structure.

A motor includes a rotor, a stator, a shaft, a base part, a hole part, a connector, and a metal connection portion. The rotor is rotatable about the axial direction. The stator radially opposes the rotor. The shaft extends axially along the central axis and supports the rotor. The base part is disposed on axial one side relative to the stator, and radially expands from the shaft. The hole part axially penetrates the base part. The connector covers the hole part when viewed from the axial direction. The metal connection portion connects the connector to the base part. The metal connection portion is disposed between the base part and the connector in the axial direction, and surrounds the hole part when viewed from the axial direction.

Described herein are sliders and data storage devices that promote particle mobility to improve particle robustness. In some embodiments, a data storage device includes a recording medium and a slider. A surface of the slider air-bearing surface near the leading edge includes at least one roughening feature that causes the surface to be rougher than other surfaces of the slider to promote particle mobility. The roughening feature may include a regular or irregular pattern, and it may be created using a photoresist mask during the manufacturing process so that the surface is deliberately made rougher (e.g., has a higher friction coefficient) than the surface of a leading pad of the slider.

Disclosed herein are sliders with deep holes, data storage devices including such sliders, and methods of manufacturing such sliders. The holes can be situated near the edges of the slider to improve the stability and/or damping of the slider. The holes may be created, for example, using ion milling. In some embodiments, a slider comprises a leading pad comprising a first medium-facing surface that includes at least a first hole and a second hole, a first side pad comprising a second medium-facing surface that includes at least a third hole, and a second side pad comprising a third medium-facing surface that includes at least a fourth hole. In some embodiments, a trailing pad of the slider comprises a fourth medium-facing surface that includes at least a fifth hole and a sixth hole.

A suspension is described. The suspension includes a base plate and a load beam coupled to the base plate. The base plate includes a distal elongated element and a proximal elongated element. The distal elongated element includes at least one non-straight baseplate edge and the proximal elongated element includes at least one non-straight baseplate edge. The load beam includes a first mounting shelf and a second mounting shelf. The load beam is coupled to the base plate such that the first mounting shelf is exposed adjacent to the distal elongated element, and the second mounting shelf is exposed adjacent to the proximal elongated element. The first and second mounting shelves are configured to receive an actuator, such that an edge of the actuator and the at least one non-straight baseplate edge forms a gap.

A gimbal assembly includes a frame having base, tip and mount portions, and a crossbar joined to the tip portion by a neck region. Portions of the crossbar and neck region define transition edge regions each extending from a point of minimum width D of the neck region to where the edge of the crossbar becomes substantially straight. Each of the transition edge regions includes a transition length a and a transition width b. The frame comprises an area of interest that includes the neck region and a portion of the crossbar that has a length of 0.6 mm and is centered to the neck region, and has a total area size A, a centroid C and a centroid distance H between the centroid C and a far side of the neck region. The crossbar and neck region have geometries that satisfy a design metric that is less than 0.05.

A piezoelectric actuator assembly is described. The assembly including a first layer including a top and a bottom surfaces. The assembly including a second layer having a top and a bottom surfaces, the bottom surface of the second layer is disposed over the top surface of the first layer. The assembly including a third layer having a top and a bottom surfaces, the bottom surface of the third layer is disposed over the top surface of the second layer. The assembly includes a first electrode, a second electrode, a third electrode, and a fourth electrode. The third electrode is configured to be shorter than the second electrode such that the active PZT length of the second layer and the third layer is shorter than the active PZT length of the first layer.