摘要:
A scanning electron microscope includes an electron beam source which emits an electron beam, a beam current controller which controls a beam current of the electron beam, an electron beam converger which converges the electron beam on a surface of a sample, an electron beam scanner which scans the electron beam on the surface of the sample, a table which mounts the sample and moves at least in one direction, a detector which detects a secondary electron or a reflected electron emanated from the sample by the scan of the electron beam, an image former which forms an image of the sample based on a detection value of the detector, an image processor which processes the image formed by the image former. The beam current controller controls the beam current of the electron beam by changing transmittance of the electron beam in an irradiation path of the electron beam.
摘要:
An apparatus for inspecting a sample using a scanning electron microscope includes a sample stage, a first electron-optical system to scan an electron beam of a first beam current on the sample, a second electron-optical system to scan an electron beam of a second beam current smaller than the first beam current on the sample, a mechanism to move the sample stage, a detector provided in each of the first and second electron-optical systems to detect a secondary electron. The first electron-optical system is operable in a first mode and the second electron-optical system is operable in a second mode with higher resolution than that of the first mode. In the first mode, the sample is observed while the sample stage is moved continuously, and in the second mode, the sample is observed by detecting a secondary electron using the detector while the sample stage is held stationary.
摘要:
Pattern inspection and measurement technique where the failure of the detection of a secondary signal due to the variation of an optical condition of a primary electron beam or the occurrence of an electric field perpendicular to a traveling direction of the primary electron beam in a surface of a wafer is minimized, an SEM image the SN ratio of which is high and which hardly has shading in a field of view can be acquired and measurement such as measuring the dimensions and configuration of a measured object and inspecting a defect is enabled at high precision and high repeatability. A lens for converging a secondary signal is installed in a position which a traveling direction of the primary electron beam crosses or on a course of the secondary signal spatially separated from the primary electron beam by Wien filter. An SEM image always free of shading caused by the failure of the detection of a secondary signal in the field of view can be acquired by providing a unit that changes the setting of the lens according to the optical condition such as retarding voltage and an electrification control electrode of the primary electron beam.
摘要:
A inspecting and measurement method and inspecting and measurement apparatus for semiconductor devices and patterns such as photomasks using an electron beam which can measure the charged potential of a sample with higher precision than in the prior art, and a inspecting and measurement apparatus which can measure charged potential by means of a simple construction. When an S curve is observed in a semiconductor device to be inspectioned and measured, fluctuations of the charged potential of the inspection sample surface are suppressed by optimizing the energy of a primary electron beam used for irradiation. When the surface potential of the semiconductor device is measured, a more precise potential measurement than that of the prior art can be performed which is almost unaffected by the charged potential of an insulation film surface. Further, the surface potential can be measured without installing a special apparatus for wafer surface potential measurement such as an energy filter, so the cost of the apparatus can be reduced.
摘要:
Cell power supply lines are arranged for memory cell columns, and adjust impedances or voltage levels of the cell power supply lines according to the voltage levels of bit lines in the corresponding columns, respectively. In the data write operation, the cell power supply line is forced into a floating state according to the bit line potential on a selected column and has the voltage level changed, and a latching capability of a selected memory cell is reduced to write data fast. Even with a low power supply voltage, a static semiconductor memory device that can stably perform write and read of data is implemented.
摘要:
The present invention provides a dielectric ceramic composition comprising: 30 to 90% by weight of a crystallized glass powder capable of depositing a diopside crystal, 1 to 40% by weight of a calcium titanate powder, a strontium titanate powder or a mixed powder thereof, and 0 to 60% by weight of at least one kind of a powder selected from the group consisting of Al2O3, TiO2, ZrO2, MgTiO3, BaTi4O9, La2Ti2O7, Nd2Ti2O7, Ca2Nb2O7, SrZrO3 and CaZrO3, and a dielectric ceramics obtained by firing the same.
摘要翻译:本发明提供一种电介质陶瓷组合物,其包含:30〜90重量%的能够沉积透辉石结晶的结晶玻璃粉末,1〜40重量%的钛酸钙粉末,钛酸锶粉末或其混合粉末, 和0至60重量%的至少一种选自下组的粉末:Al 2 O 3,TiO 2, ZrO 2,MgTiO 3,BaTi 4 O 9,La 2 Ti, N 2,N 2,N 2,N 2,O 2,C 2 Nb 2 O 3,SrZrO 3和CaZrO 3 3,以及通过烧结获得的电介质陶瓷 一样。
摘要:
It was hard for conventional SEMs to take measurements at a high speed and take accurate measurements when an insulator exists between an object to probe and the detector, because the conventional SEMs used a continuous electron beam. Also, it was impossible to apply voltage to the sample during the measurement of current. By pulse-modulating the electron beam and extracting a high-frequency signal component from the sample, new SEM equipment disclosed herein detects electrons absorbed in the sample at a high speed and with precision. Precise and high-speed absorption current measurements can be achieved. High-functionality inspection apparatus can be provided.
摘要:
The present invention relates to an inspection apparatus comprising: an electron emitting unit for sequentially emitting an electron beam in the direction of the inspection area of a sample; a decelerating means for drawing back the electron beam in the vicinity of the inspection area; an imaging unit for forming images of the electron beam, which has been drawn back in the vicinity of the inspection area, on multiple different image forming conditions; an image detecting unit for capturing the electron beam that formed an image corresponding to each image forming condition and an image processing unit for comparing the images on different image forming conditions with one another to thereby detect a defect in the inspection area.
摘要:
It was hard for conventional SEMs to take measurements at a high speed and take accurate measurements when an insulator exists between an object to probe and the detector, because the conventional SEMs used a continuous electron beam. Also, it was impossible to apply voltage to the sample during the measurement of current. By pulse-modulating the electron beam and extracting a high-frequency signal component from the sample, new SEM equipment disclosed herein detects electrons absorbed in the sample at a high speed and with precision. Precise and high-speed absorption current measurements can be achieved. High-functionality inspection apparatus can be provided.
摘要:
In a semiconductor device, first gate electrodes contributing to transistor operations and second gate electrodes not contributing to the transistor operations each have the same gate length, share the common gate length direction, and are arranged in the same pitch. The first gate electrodes and the second gate electrodes are all made to extend, in the gate width direction, beyond the longest active region width. With such a configuration, it is possible to provide a semiconductor device having a pattern structure that will not cause performance degradation of transistors when designing a semiconductor integrated circuit within a semiconductor device.