摘要:
In a process of forming a film on a surface of a wafer by thermal processing, laser light generated by a light source is depolarized by a depolarizer and the deporlarized light is irradiated upon the surface of wafer. As for the light reflected from the surface of wafer, polarization components in predetermined two directions perpendicular to each other are extracted by a beam splitter, and optical sensors receive the extracted light components to detect each intensity. An analytical processing unit determines a thickness of a formed film based on a change in a difference in intensity.
摘要:
It is an object of this invention to attain reliable starting characteristics and stable rotation performance of a motor in a motor of a phase synchronization driving type. To achieve this object, according to this invention, there is provided a motor driving apparatus having a stepping motor constituted by a stator with at least two poles, a rotor having a permanent magnet with at least two poles, and a driving coil magnetically coupled to the stator, a driving pulse generation means for outputting a driving pulse signal for driving the stepping motor, a driving circuit for supplying a driving current to the driving coil on the basis of the signal from the driving pulse generation means, a voltage detection circuit for detecting a counter electromotive voltage generated upon rotation of the rotor, and a pole position detection means for detecting the pole position of the rotating rotor with respect to the rotor on the basis of a detection signal generated by the voltage detection circuit, the driving pulse generation means controlling the output timing of the driving pulse signal on the basis of the detection signal from the pole position detection means, characterized in that the pole position detection means stops outputting the driving pulse signal on the basis of the detection signal from the voltage detection circuit which is detected during the output period of the driving pulse signal, and outputs a driving pulse signal having a phase opposite to that of the driving pulse signal.
摘要:
An apparatus for measuring an electromagnetic field distribution using a focused electron beam can measure the electromagnetic field distribution in a specimen with high resolution and high reliability. A focused electron beam radiation system irradiates a specimen with a focused electron beam. A specimen tilt mechanism tilts a specimen by 180.degree. about a tilt axis that is perpendicular to the optical axis of the focused electron beam. An electron beam position detector measures the direction and quantity of the deflection given to the focused electron beam when it is transmitted through the specimen. Further, a processing system calculates the direction and the intensity of an electric field, and the direction and the intensity of a magnetic field separately at a point on the specimen through which the focused electron beam is transmitted, from the data on the direction and the quantity of the deflection of the focused electron beam measured by the electron beam position detector before and after the turnover of the specimen by the specimen tilt mechanism. Thus, an electric field and a magnetic field in a specimen can be separately observed independently of each other.
摘要:
The power generated by a power generating means (1) of a power-generating type electronic clock is measured by a first power generating sensing means (101) and a second power generating sensing means (102). The power generation level required when the operation is changed from a normal mode to a power-saving mode and the power generation level required when the operation is changed from the power-saving mode back to the normal mode are made different to prevent the phenomenon that the operation changes frequently by imparting hysteresis characteristics to the power generation level which causes a change in the mode, thereby improving the power-saving effect.
摘要:
An actuator includes piezo electric devices which are installed in contact with a drive head and a driven body which is contact-driven by the drive head. Thus, only one mechanism performs coarse motion and micromotion by forming a gap between the drive head and driven body. The high precision positioning mechanism can be miniaturized and constructed at a low price.
摘要:
An electron microscopic image observing method and an apparatus for carrying out the same enables the observation of an electron microscopic image of a specimen by irradiating the specimen with an electron beam and detecting the electron beam after it has transmitted through the specimen. The electron beam transmitted through the specimen is deflected so that the deflection thereof varies with time, and is allowed to pass through an aperture only when the deflection thereof is within a predetermined range of deflection, whereby the electron beam transmitted through the specimen and passed through the aperture is then detected. Thus, the electron microscopic image observing method and the apparatus for carrying out the same enables the observation of time-resolved electron microscopic images of a specimen having internal physical properties varying with time.
摘要:
A scanning interference electron microscope includes an electron source, a focusing lens, an electron beam deflection system and a biprism. The biprism separates the primary electron beam emanating from the electron source into two beams. One of the separated beams is controlled by the deflection system to scan the sample surface, thereafter interfering with the other separated beam to generated interference fringes. The phase difference due to interaction of the first electron beam with a sample surface produces changes in the interference intensity of the interference fringes, which represent a microscopic image of the sample.
摘要:
An optical nanodisplacement producing apparatus is realized by employing an optical parametric oscillator of which cavity length is varied in correspondence with a wavelength or the intensity of the output light signal to achieve a fine-displacement producing mechanism. An optical nanodisplacement producing apparatus having high resolution less than 0.1 nm and a highly stable characteristic is realized as a very fine pattern forming/monitoring apparatus.
摘要:
A combination apparatus having a scanning electron microscope includes equipment for performing any of observing, measuring and processing operations on a sample placed in a sample chamber. The sample chamber contains a focused electron beam irradiating unit apart from the components for performing the observing, measuring and processing operations. The focused electron beam irradiating unit irradiates a finely focused electron beam onto the surface of the sample for electron microscopic observation in scanning fashion. This setup allows the observing, measuring or processing equipment to combine with the scanning electron microscope without appreciably enlarging the construction of the combination apparatus.
摘要:
An atomic force microscope is provided for sensing displacement of a cantilever based on scanning tunneling microscopy. The atomic force microscope includes a cantilever moving system which allows the cantilever to be moved or slipped between an STM tip and a sample. This results in the microscope being able to carry out atomic force microscopy and tunneling microscopy without changing a single STM tip and to control the very small force between the sample and the tip to be constant.