Sae Magnetics (h.k.) Limited

Sae Magnetice (h.k.) Ltd.

Ming Gao Yao

Masashi Shiraishi

Yi Xie

Tamon Kasajima

Wei Yang

Rock Feng Tao

Xiao Ming Wong

Di Peng

Qi Liu

Kun Zhao

Nan Jiang

Chun Li

Wei Xiong

Hong Jiang

Lin Guo

Li Yan Zhu

Koyu Yamanoi

Huiling Liu

Jilong Zhang

Jicai Xu

Zhaohui Wu

Yeliang Han

Wanqiang Wang

Sun Yu

Fanglei Chen

Wenzhu Tian

Xuemei Gao

Jingqiu Sun

Lidan Chen

Changjie Yang

Towel holder

The present disclosure relates to an intelligent prevention passage control system for an electronic device, which comprises a detection device for an electronic device, a traffic control device integrated with the detection device for the electronic device, an industrial control host, a server, an access controller and a management terminal inside the traffic control device. The present disclosure can more accurately judge violations by scoring violations, and can make the system more intelligent by accurately judging violations, thus realizing no manual attendance, solving the problems of personnel recruitment, shift attendance and personnel management, and saving a lot of labor cost. At the same time, the system can avoid the hidden dangers caused by human feelings, sense of responsibility and inertia brought by manual prevention, and ensure the consistent, accurate and reliable standards of detection work.

Intelligent prevention passage control system for electronic device

An electrical current sensor device includes a first printed circuit board assembly, a second printed circuit board assembly positioned opposite to the first printed circuit board assembly, and a holder holding the first and second printed circuit board assemblies and providing a passage to allow an electrical conductor to pass through. The first printed circuit board assembly includes a first sensing circuit having a first element pair that includes two magnetoresistive elements with a first pinning direction, the second printed circuit board assembly comprises a second sensing circuit with a second element pair that includes having two magnetoresistive elements with a second pinning direction that is opposite to the first pinning direction, and the first and second pinning directions are perpendicular to a current direction of a current passing through the electrical conductor, the first sensing circuit electrically connects with the second sensing circuit to form a Wheatstone bridge circuit.

Electrical current sensor device

A system and method are disclosed for a subambient pressure air bearing slider utilizing negative pressure grooves. In one embodiment, a groove extends from a slider's leading edge, splits, and terminates in two locations at the slider's trailing edge. In one embodiment, a groove is provided in a slider's compression pad near the trailing edge of the slider.

System and method for a subambient pressure air bearing slider utilizing negative pressure grooves

A head gimbal assembly may comprise a slider, a micro-actuator attached to the slider, a flexure to mount the slider and the micro-actuator, and a suspension comprising a support region, a main portion, and a moving portion, wherein the flexure comprises a plurality of trace sets to electrically couple the micro-actuator and the slider, and wherein the plurality of trace sets are laminated generally parallel to each other.

Suspension with locally strengthened integrated trace connections

A system and method are disclosed for using a test slider to test the resonance performance of a head gimbal assembly. The test slider has a two-stripe air-bearing surface to allow the test slider to glide above a surface and a block with a mass equal to the combined mass of the electrical slider and the micro-actuator. The leading edge of the slider is tapered and has a main air groove to facilitate gliding. A back step on the side of the test slider opposite the air bearing surface maintains a parallel gap between the slider and the suspension tongue of the head gimbal assembly.

Method and mechanism of the suspension resonance optimization for the hard disk driver

A system and method using a framing assembly to provide support for a micro-actuator and allow the micro-actuator to be connected to a suspension assembly is disclosed. In one embodiment, the framing assembly consists of a base with two arms attached. In a further embodiment a crosspiece connects the two arms. In a further embodiment, the framing assembly is metal and have strips of piezoelectric material attached to the arms.

Method and mechanism of the PZT micro-actuator application for the magnetic head gimbal assembly of the hard disk driver

A HGA of the invention includes a slider; a micro-actuator to adjust the position of the slider; and a suspension to load the slider and the micro-actuator. The micro-actuator includes two side arms; a load plate for supporting the slider, which is connected with at least one of the side arms; a piezoelectric element connected with the side arms; and a base shaft to couple with the suspension, which is connected with the side arms and positioned between the load plate and the piezoelectric element. The invention also discloses a disk drive unit using such a HGA.

Micro-actuator, head gimbal assembly and disk drive unit with the same

A thin film piezoelectric (PZT) micro-actuator is disclosed. Two thin film pieces of PZT are couple to a slider support frame. The slider support frame has a slider support connected by a leading beam to a base. The two thin film pieces of PZT connect the slider support to the base. Applied voltage causes the thin film pieces of PZT to contract or expand, moving the slider support in relation to the base. The thin film pieces of PZT can be single or multiple layers. The thin film PZT micro-actuator can be coupled to the suspension by anisotropic conductive film, with the thin film pieces of PZT between the slider support frame and the suspension. Alternately, the thin film PZT micro-actuator can be coupled to the suspension with the thin film pieces of PZT exterior to the slider support frame and the suspension.

Micro-actuator having swing support to allow horizontal swinging movement of slider support

A fixture with a shaped molding may hold a first micro-actuator part and a second micro-actuator part in place for coupling while maintaining the structure of the first micro-actuator part. The first micro-actuator part and the second micro-actuator part may be a frame or a strip of piezoelectric material. A vacuum nozzle system embedded in the fixture may hold the first micro-actuator part in place. A mobile vacuum nozzle system may hold the second micro-actuator in place and positions the second micro-actuator part relative to the first micro-actuator part. A camera system may monitor the process. A dispense may apply epoxy between the first and second micro-actuator part. An ultraviolet source may provide ultraviolet radiation for curing.

Method and mechanism of PZT micro-actuator attachment for the hard disk driver arm

A head gimbal assembly (HGA) for a disk drive unit that includes a micro-actuator, a slider and a suspension to load the slider and the micro-actuator. The micro-actuator includes a pair of actuator side arms, a PZT element extending between and connecting the actuator side arms; a rotatable plate positioned between the actuator side arms, wherein the slider is mounted on the rotatable plate; and a pair of connection elements that connect the rotatable plate to the actuator side arms, respectively. The rotatable plate rotates in a first direction when the PZT element contracts and a second direction when the PZT element expands.

Rotational PZT micro-actuator, head gimbal assembly, and disk drive unit with the same

A system and method for connecting an actuator to a suspension element is disclosed. The actuator is electrically coupled using a silver paste. The silver paste is further covered by a coating application to provide structural support. A step, attached to either the actuator base or the suspension tongue, provides further structural support and maintains a gap between the actuator and the suspension element.

Method and apparatus for connecting a micro-actuator to driver arm suspension

A head gimbal assembly (HGA) including a slider, a micro-actuator and a suspension to load the slider and the micro-actuator. The micro-actuator includes a support base and a piezoelectric unit used for both position displacement adjustment and flying height adjustment. The support base includes a base, a moving plate, and a leading beam to connect with the base and the moving plate. The invention also discloses a method of manufacturing such micro-actuator and HGA, and a structure of a disk drive having the micro-actuator and HGA.

Growing community of inventors

Dongguan, China

Ming Gao Yao