A 4" QVGA flexible AMOLED display driven by the developed solution-processed metal oxide TFTs was presented in this work. The spin coating technology was introduced to deposit the metal oxide semiconductor film. The highest carrier mobility of the solution-processed metal oxide TFTs is 4.02 cm 2 /Vs, and the electrical reliability is also discussed in this work.
To expedite design cycles and to evaluate performance of designed hard disk drives, mathematical models to predict position error signal (PES) are needed. Existing mathematical model can successfully predict PES during track following. However, there is no computational efficiency approach to predict PES after a long seek presently. In this paper, we presents a feasible mathematical model to achieve this purpose. Detail mathematical derivations and numerical simulations are also included in this paper. Our mathematical models are capable to obtain reasonable qualitative predications after a long seek.
Shock of computer hard disk drives (HDD) in both portable and desktop computers is a common problem. Shock of an HDD can occur during installing the HDD into the computer, HDD testing, HDD handling, and so forth. It is important to identify key design parameters to improve HDD shock performance. This paper presents the finite element studies of a HDD under a non-operational linear drop shock. A complete HDD model is built in ANSYS finite element package. GP commands are used to apply the preload and define the interface between the head and the disk. Shock pulses with different amplitudes and pulse widths are applied to the HDD. The minimum shock amplitude required to lift off the head from the disk is determined for different shock pulse width. Discrete Fourier Transform studies are used to identify critical frequency ranges for different shock pulse widths. The design guideline for the minimum space required between the swage plates and the disk is provided. The effects of drive base stiffness, disk thickness, actuator arm stiffness, and bearing stiffness on HDD shock performance are investigated.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.