摘要:
In a signal transmission system, performing signal transmission via signal interconnections 4-1 to 4-3 between a memory 1 and a memory controller 2 mounted on a printed circuit board 3, noise or jitter may tend to be increased in the memory 1 and in the memory controller 2 at a specified data rate due to interconnection length resonance. Registers 6-1 and 6-2 are provided to hold information on the data rate. These registers 6-1 and 6-2 are provided in the signal transmission system along with a control system that modifies the relationship between clock frequency and interconnection length. The data rate or the propagation delay time is controlled to allow for avoiding the resonance.
摘要:
There is provided a retention mechanism for an immersion medium, for use in a device which observes/measures a sample by use of an immersion objective lens, includes a member which retains the immersion medium near a tip portion of the objective lens, wherein the member is configured to include at least first and second materials.
摘要:
A focal position determining method determines a focal position of an objective lens focused on an observed target region in a specimen. The focal position determining method includes measuring any one of the focal position of the objective lens at a near point and the focal position of the objective lens at a far point or both so as to determine the focal position of the objective lens focused on the observed target region based on the measured focal position.
摘要:
A measuring apparatus includes a confocal optical microscopy, an excitation light source unit that emits excitation light for generating fluorescence from a fluorescent material, and a light-receiving unit. The confocal optical microscope includes an excitation light input port for taking in excitation light from the excitation light source unit, and an output port for outputting fluorescence generated by the excitation light. The light-receiving unit includes an input portion for taking in signal light containing fluorescence from the confocal optical microscope. An input portion of the light-receiving unit is optically connected to the output port of the confocal optical microscope through an optical fiber.
摘要:
To enable measurement over a wide dynamic range from weak light quantity to strong light quantity in a light quantity detection device for detecting the light quantity, a detection signal from a photon counting light detector is A/D converted. When the A/D converted detection signal has a preset threshold value or more, the detection signal is transmitted as it is to a number-of-photons calculation circuit in a subsequent stage, and when the detection signal has the threshold value or less, threshold value processing for transmitting a preset reference value to the subsequent stage is performed. In the number-of-photons calculation circuit, the number of photons or the light quantity incident on the photon counting light detector is acquired from the dimension of an acquired detection signal waveform until the light quantity measurement ends.
摘要:
To enable measurement over a wide dynamic range from weak light quantity to strong light quantity in a light quantity detection device for detecting the light quantity, a detection signal from a photon counting light detector is A/D converted. When the A/D converted detection signal has a preset threshold value or more, the detection signal is transmitted as it is to a number-of-photons calculation circuit in a subsequent stage, and when the detection signal has the threshold value or less, threshold value processing for transmitting a preset reference value to the subsequent stage is performed. In the number-of-photons calculation circuit, the number of photons or the light quantity incident on the photon counting light detector is acquired from the dimension of an acquired detection signal waveform until the light quantity measurement ends.
摘要:
Head elements are formed on a wafer to suppress deterioration in pinning strength of a pinned layer, which is caused by ESD generated during air bearing surface polishing of a thin film magnetic head. The wafer is cut into rovers in each of which are connected head elements. Rover air bearing surfaces are polished until an MR elements attain a predetermined height. A final polishing step finishes air bearing surfaces by applying an electroconductive polishing liquid to achieve a predetermined shape and surface roughness with high accuracy. A pinning defect occurrence rate is reduced by suppressing deterioration in pinning strength of a pinned layer of a read element. To achieve this, a specific resistance of the electroconductive polishing liquid is controlled to 5 GΩ·cm or less. A shallow rail and a deep rail are formed on the air bearing surfaces, and the rover is cut into thin film magnetic heads.
摘要:
The characteristic evaluating system of the present invention includes: a cable-driving transmitter transmitting a signal to one end of a cable to be measured; a load connected to the other end of the cable; a probe detecting a common mode current of the cable; a receiver receiving a signal detected by the probe; and a controller controlling the cable-driving transmitter, the load, and the receiver. The cable-driving transmitter is constructed such that a plural transmission condition is selectable when transmitting the signal. The load is constructed such that plural termination conditions corresponding to the signals transmitted to the cable is selectable. The characteristic of the cable is measured by scanning relative positions of the probe and the cable in a longitudinal direction of the cable.
摘要:
Head elements are formed on a wafer in order to suppress deterioration in pinning strength of a pinned layer, which is caused by ESD generated during a thin film magnetic head production process, particularly in an air bearing surface polishing step. The wafer is cut line by line into rovers in each of which the head elements are connected; surfaces to be used as air bearing surfaces of the rover are polished until an MR element height reaches to a predetermined value. After this air bearing surface polishing, an electroconductive polishing liquid is used in a final bearing surface polishing step of finishing the air bearing surfaces to achieve a predetermined shape with high accuracy and a predetermined value of a surface roughness. In order to suppress a pinning defect occurrence rate by suppressing deterioration in pinning strength of a pinned layer of a read element, a specific resistance of the electroconductive polishing liquid is controlled to GΩ·cm or less, preferably 1 GΩ·cm or less. After that, a shallow rail and a deep rail are formed on the air bearing surfaces, and the rover is cut to accomplish thin film magnetic heads.
摘要:
There is provided a retention mechanism for an immersion medium, for use in a device which observes/measures a sample by use of an immersion objective lens, includes a member which retains the immersion medium near a tip portion of the objective lens, wherein the member is configured to include at least first and second materials.