Abstract: A micro-light emitting diode (uLED) device comprises: a mesa comprising: a plurality of semiconductor layers including an n-type layer, an active layer, and a p-type layer; a p-contact layer contacting the p-type layer; a cathode contacting the first sidewall of the n-type layer; a first region of dielectric material that insulates the p-contact layer, the active layer, and a first sidewall of the p-type layer from the cathode; an anode contacting the top surface of the p-contact layer; and a second region of dielectric material that insulates the active layer, a second sidewall of the p-type layer, and the second sidewall of the n-type layer from the anode. The top surface of the p-contact layer has a different planar orientation compared to the first and second sidewalls of the n-type layer. Methods of making and using the uLED devices are also provided.

Abstract: A cylindrical-shape electromagnetic actuator comprising a plurality of pairs of magnets, the magnets of each pair being held at a distance from each other with an effective air gap formed therebetween for accommodating a coil structure; and a substantially cylindrical frame structure for supporting the pairs of magnets, the frame structure being configured such that substantially separate closed loop magnetic paths are provided for the respective pairs of magnets.

Abstract: A linear-rotary electromagnetic actuator with a rotation module having an output shaft and a rotary encoder configured to sense rotary motion of the output shaft; and a translation module having a linear encoder configured to sense translational motion of the intermediate component; and an intermediate translator coupled between the rotation module and the translation module.

Abstract: A flexure for an electromagnetic nano-positioning linear actuator having a support and an actuating body, the flexure comprising: a first resilient end for attaching to the support; a second resilient end for attaching to the actuating body; and a substantially rigid intermediate portion located between the first resilient end and the second resilient end.

Abstract: A flexure for an electromagnetic nano-positioning linear actuator having a support and an actuating body, the flexure comprising: a first resilient end for attaching to the support; a second resilient end for attaching to the actuating body; and a substantially rigid intermediate portion located between the first resilient end and the second resilient end.

Abstract: A disc drive has a top cover formed from a moldable material by an injection molding process and a metal top pole piece over-molded within the top cover. A voice coil motor assembly includes a voice coil attached to an actuator arm of the disc drive, a bottom pole mounted to a base plate of the drive, and a magnet attached to the bottom pole, wherein the coil is positioned adjacent to the permanent magnet between the bottom pole and the top pole piece once the top cover is attached to the base plate. The top cover may be molded from a reinforced polymer material. The metal top pole piece may include a protruding mounting surface that is secured to an actuator arm bearing shaft to provide a metallic anchor between the bearing shaft and the molded top cover.