摘要:
A memory cell of a dynamic storage device is composed of a MOSFET and a capacitor. On a single semiconductor substrate, a plurality of such memory cells are regularly arranged so as to form a plurality of columns, with the result that they constitute a memory cell array or a memory cell mat. The capacitor for the memory cell is made up of a semiconductor region of the type which possesses a conductivity opposite to that of the semiconductor substrate, and a conductor film which is formed of polycrystalline silicon or the like on the semiconductor region through a comparatively thin insulating film. The areas of the capacitors in the memory cell column situated at an end portion of the memory cell mat are made larger than those of the capacitors of the memory cells at an inner or central portion of the memory cell mat. The memory cells at the end portion of the memory cell mat come to have information holding times equivalent to those of the memory cells at the central portion of the memory cell mat.
摘要:
It is an object of the present invention to obtain an image which is focused on all portions of a sample and to provide a charged particle beam apparatus capable of obtaining a two-dimensional image which has no blurred part over an entire sample. In order to achieve the above object, the present invention comprises means for changing a focus condition of a charged particle beam emitted from a charged particle source, a charged particle detector for detecting charged particles irradiated from a surface portion of said sample in response to the emitted charged particle beam, and means for composing a two-dimensional image of the surface portion of the sample based on signals on which said charged particle beam is focused, said signals being among signals output from the charged particle detector.
摘要:
It is an object of the present invention to obtain an image which is focused on all portions of a sample and to provide a charged particle beam apparatus capable of obtaining a two-dimensional image which has no blurred part over an entire sample. In order to achieve the above object, the present invention comprises means for changing a focus condition of a charged particle beam emitted from a charged particle source, a charged particle detector for detecting charged particles irradiated from a surface portion of said sample in response to the emitted charged particle beam, and means for composing a two-dimensional image of the surface portion of the based on signals on which said charged particle beam is focused, said signals being among signals output from the charged particle detector.
摘要:
It is an object of the present invention to obtain an image which is focused on all portions of a sample and to provide a charged particle beam apparatus capable of obtaining a two-dimensional image which has no blurred part over an entire sample. In order to achieve the above object, the present invention comprises means for changing a focus condition of a charged particle beam emitted from a charged particle source, a charged particle detector for detecting charged particles irradiated from a surface portion of said sample in response to the emitted charged particle beam, and means for composing a two-dimensional image of the surface portion of the based on signals on which said charged particle beam is focused, said signals being among signals output from the charged particle detector.
摘要:
A sample CD measurement system adapted for measuring the CD of a measurement portion accurately even in the case where the shape of the measurement portion and the direction of measurement are arbitrary. Before the CD measurement, a measurement reference image corresponding to the measurement portion is registered in a computer and controller. At the time of the CD measurement, the measurement reference image is read and compared with an image of the measurement portion to thereby obtain a difference in shape between the image of the measurement portion and the measurement reference image on the basis of a result of the comparison to thereby obtain the CD of the measurement portion on the basis of the difference in shape.
摘要:
An electron beam which can transmit through part of a specimen and can reach a portion not exposing to the electron beam is irradiated and a scanning image is obtained on the basis of a signal secondarily generated from a portion irradiated with the electron beam. Dimension-measuring start and end points are set on the scanning image and a dimension therebetween is measured. A cubic model is assumed, the cubic model is modified so as to match the scanning image, and dimension measurement is carried out on the basis of a modified cubic model.
摘要:
A pattern shape inspection apparatus for displaying a specimen image on a display apparatus, and inspecting a pattern shape of the specimen image includes a memory for memorizing a reference image corresponding to an observation region and a display for simultaneously displaying the reference image and the specimen image. At least one of the image parameters of the specimen image and the reference image is corrected to aid in the comparison.
摘要:
In a pattern dimension measuring method for scanning a sample at a predetermined scanning pitch by a scanning probe as in a scanning electron microscope, forming a sample image using a scanning signal obtained from the sample, scanning a predetermined portion of a pattern to be measured in a sample image by said probe, and measuring a dimension of said predetermined portion by processing obtained scanning signal according to a predetermined algorithm, said scanning pitch is varied according to the case for positioning the pattern to be measured and the case for measuring the pattern dimension when observing in a low magnification, and said scanning pitch for measuring the pattern dimension is adjusted to be small, about a diameter of the probe.
摘要:
One object of the present invention is to provide the reduced projection exposure method which enables the exposure of various and fine patterns in manufacturing process of semiconductor devices or semiconductor integrated circuit devices. Structure of the present invention to attain the above object is to carry out the reduced projection exposure using a phase shift mask provided with a prescribed correction pattern on the end of the mask pattern domain of a constant mode or the boundary of the mask pattern domain of plural modes. According to this structure, as the end effects etc. are canceled by the correction pattern, the various and fine patterns can be exposed.
摘要:
Disclosed herein is a microwave dielectric ceramic composition which comprises a compound represented by the formula BaO.multidot.xTiO.sub.2 (where 3.7.ltoreq.x.ltoreq.4.5) which is incorporated with 1.0-10 wt. % Ba.sub.3 Ti.sub.12 Zn.sub.7 O.sub.34 and 2-8 wt. % Ta.sub.2 O.sub.5. It has well-balanced performance owing to a Q value not less than 8000 (at 4.5 GHz), a relative permittivity .epsilon. not less than 31, and a practical temperature coefficient in the range of -15 to +10 ppm/.degree.C. It may be further incorporated with 0.1-0.4 wt. % MnO.sub.2 for improved sinterability in addition to the above-mentioned performance.