摘要:
A method for performing a bit line implant is disclosed. The method includes forming a group of structures on an oxide-nitride-oxide stack of a semiconductor device. Each structure of the group of structures includes a polysilicon portion and a hard mask portion. A first structure of the group of structures is separated from a second structure of the group of structures by less than 100 nanometers. The method further includes using the first structure and the second structure to isolate a portion of the semiconductor device for the bit line implant.
摘要:
Methods of controlling seeking of a transducer that is adjacent to a rotatable disk in a disk drive are disclosed. The methods may include accelerating the transducer radially across the rotatable disk from an initial track on the rotatable disk toward a destination track on the rotatable disk, estimating a deceleration switching position/velocity point, estimating a maximum deceleration position/velocity point following the deceleration switching position/velocity point, and estimating a deceleration current required to decelerate the transducer from a non-zero velocity at the maximum deceleration position/velocity point to zero velocity at the destination track. The estimated deceleration current is compared to a maximum available deceleration current, and responsive to a determination that the current required to decelerate the transducer from the maximum deceleration point to the destination track exceeds the maximum available deceleration current, the estimated deceleration switching point is adjusted. Related disk drive apparatus are also disclosed.
摘要:
A hard disk drive is disclosed comprising at least one disk rotatable about an axis, an actuator assembly moveable relative to the disk, a transducer positioned on the actuator assembly, an actuator signal line, a piezoelectric actuator element disposed on the actuator assembly and electrically interconnected to the actuator signal line, a processor, a sensor signal line and a piezoelectric sensor element for sensing a vibration. The piezoelectric sensor element is collocated with the piezoelectric actuator element and electrically interconnected to the processor by the sensor signal line. The piezoelectric actuator element is operable to move the at least one transducer relative to a surface of the disk. The piezoelectric sensor element is electrically isolated from the piezoelectric actuator element. A method for detecting a vibration in a hard disk drive actuator assembly is also disclosed.
摘要:
In accordance with various embodiments, initial servo data are written to a storage medium as a series of radially overlapped spiral segments. Final servo data are thereafter written to the medium while concurrently servoing on said overlapped segments.
摘要:
An apparatus and associated method for preconditioning an elastomeric stop member to create a stabilized reference position for a moveable member by repetitively biasing the moveable member against the stop member and using the stabilized reference position to initiate a writing of servo data by the moveable member to a storage surface.
摘要:
According to one exemplary embodiment, a floating gate memory cell comprises a stacked gate structure situated on a substrate and situated over a channel region in the substrate. The floating gate memory cell further comprises a recess formed in the substrate adjacent to the stacked gate structure, where the recess has a sidewall, a bottom, and a depth. According to this exemplary embodiment, the floating gate memory cell further comprises a source situated adjacent to the sidewall of the recess and under the stacked gate structure. The floating gate memory cell further comprises a Vss connection region situated under the bottom of the recess and under the source, where the Vss connection region is connected to the source. The Vss connection region being situated under the bottom of the recess causes the source to have a reduced lateral diffusion in the channel region.
摘要:
A disk drive includes a disk, a head, a coarse actuator, a microactuator, and a servo controller. The microactuator positions the head relative to the disk. The coarse actuator positions the microactuator and the head relative to the disk. The servo controller controls the microactuator in accordance with a microactuator feedforward control signal that is provided by the servo controller based on a plurality of microactuator feedforward values. The servo controller tunes at least one microactuator feedforward value of the plurality of microactuator feedforward values. The servo controller scales the microactuator feedforward control signal in accordance with a microactuator feedforward gain, and the servo controller adjusts the microactuator feedforward gain based on a position error signal that is determined during a seek operation.
摘要:
Examples of the present invention relate to reduction in acoustic noise by tuning seek characteristics of a servo controller, depending on a radial position of a head relative to a disk. The servo controller can provide compensation for acoustic resonance modes.
摘要:
A method and system for improving the topography of a memory array is disclosed. In one embodiment, a dummy bitline is formed over a field oxide region at an interface between a memory array and interface circuitry. In addition, a poly-2 layer is applied above the dummy bitline on the field oxide region wherein the utilization of the field oxide region for placement of the dummy bitline provides a uniform surface between an actual bitline and the periphery of the memory array. Furthermore, a landing pad is formed at the end of the dummy bitline on the field oxide region, wherein the dummy bitline does not cause erroneous operation of the landing pad.
摘要:
A drain (7) includes a lightly-doped shallow impurity region (7a) aligned with a control gate (5), and a heavily-doped deep impurity region (7b) aligned with a sidewall film (8) and doped with impurities at a concentration higher than that of the lightly-doped shallow impurity region (7a). The lightly-doped shallow impurity region (7a) leads to improvement of the short-channel effect and programming efficiency. A drain contact hole forming portion (70) is provided to the heavily-doped impurity region (7b) to reduce the contact resistance at the drain (7).