摘要:
A method for representing logic changes of state occurring at a plurality of adjacent circuit nodes in an integrated circuit in the form of a logic image employs a pulsed electron probe which always scans a same path in the x-direction on the integrated circuit and the phase of the electron pulses comprising the pulsed electron probe is continuously shifted for each new scanning operation. The integrated circuit can be imaged up to the edge of a recording or field of view limit and it is only at this limit that the y-deflection of the pulsed electron probe is fixed. Very small spacings, such as those occurring between adjacent integrated circuit tracks, can thus be reliably imaged on the picture screen of the scanning electron microscope.
摘要:
A method for measuring a resistance and a capacitance of an electronic component utilizes electron beam measuring technology to impress a current I.sub.A by means of a pulsed electron beam on the component. A potential curve U(t) which arises during the pulse on the electronic component as a result of the impressed current is utilized together with the known current to determine the resistance R and the capacitance C by means of an appropriate selection of two measuring points U(t.sub.1) and U(t.sub.2) on the potential curve.BACKGROUND OF THE INVENTIONThe invention relates to a method for measuring resistances and capacitances of eletronic components.Up to now, the measurement of resistances and capacitances of electronic components was carried out with a mechanical probe. The smallest measurable capacitance according to this method amounted to 1 pF. The loading effects associated with such probes affects accurate measurement.
摘要:
A method for setting voltage resolution in particle beam measuring devices wherein band width of a measured signal processing is modified. In order to set a desired voltage resolution simply, reliably, and with high precision, a signal noise of the measured signal is measured. This signal noise is compared to a desired value for the measured signal resolution, and the band width of the measured signal processing is modified such that the signal noise of the measured signal is less than or equal to the desired value for the measured signal resolution.
摘要:
A method for automatically setting an operating point in signal curve measurements with particle beam measuring apparatus. An automatic setting of the operating point is provided when no specific point in time is known at which a reference potential is present at a measuring location. Given stroboscopically keyed primary particles, a periodic signal curve, which also comprises a specific reference potential in addition to other potentials, is applied to the measuring location. The keying phase of the keyed primary particles is varied with respect to the periodic signal curve. The periodic signal curve is quantitatively registered in this fashion. The phase point of the qualitatively registered signal curve which corresponds to the specific reference potential at the measuring location is identified. A keying phase of the primary particles is kept constant during the setting of the operating point, and is kept constant to phase points at which the reference potential is present at the measuring location.
摘要:
The present invention relates to a focussing lens (100) for focussing a charged particle beam (7) onto a specimen (3) at a predetermined landing angle (42; 42′; 42) comprising at least one first electrode (26, 105, 105a) having a first aperture (106) to generate a focussing electric field (110) for focussing the charged particle beam (7) onto the specimen (3); and a correcting electrode having a curved surface (115) to compensate for landing angle dependent distortions of the focussing electric field (110) caused by the specimen (3). With the curved surface (115) of the correcting electrode it is possible to improve the focussing of a charged particle beam at landing angles that differ from the perpendicular landing angle.
摘要:
A spectrometer objective is composed of a short focal length, asymmetrical objective lens comprising an integrated electrostatic opposing field spectrometer and a single-stage deflection system arranged within the magnetic lens. Since the deflection of primary electrons occurs within the spectrometer objective, the space for a two-state deflection system employed in conventional systems between a condenser lens and an objective lens can be eliminated. The extremely-short structural length of the electron beam measuring apparatus which is thereby obtainable, in turn, has a beneficial effect on the influence of the lateral Boersch effect on probe diameter, this influence increasing with the length of the electron-optical beam path.
摘要:
An electrostatic opposing field spectrometer has an extraction electrode (AN) and an opposing field electrode arrangement with a pair of planar opposing field electrodes (EG1 and EG2) mounted to an outer electrode part (EM) at either end of a truncated conical shaped bore extending therethrough, where the smaller opening of the bore is in the direction of the extraction electrode (AN). The planar opposing field electrodes (EG1 and EG2), in conjunction with the bore surface, generates substantially spherical equi-potential lines (A1 and A2) which transmit a larger solid angle distribution of secondary electrons (SE) triggered at a measuring point (M) on the specimen surface (PR).
摘要:
A charged particle beam apparatus is provided which comprises a charged particle source for producing a primary beam of charged particles, aperture means for collimating said primary beam of charged particles, wherein said aperture means is adapted to switch between a collimation of said primary beam to a width appropriate for serial imaging of a sample as well as a collimation of said primary beam to a width appropriate for parallel imaging of said sample, a condenser lens for condensing said primary beam of charged particles, scanning means for deflecting said primary beam of charged particles, an objective lens for focusing said condensed primary beam, a sectorized detector for detecting a secondary charged particles. Also, several different operation modes of the beam apparatus are described allowing for serial imaging as well as parallel imaging.
摘要:
The invention relates to a method as well as to apparatus for testing the function of microstructure elements, wherein the microstructure element is driven for testing the emission and/or mechanical properties and the corpuscles emitted or reflected by it are detected and evaluated.
摘要:
An improved secondary electron spectrometer for measuring voltages occurring on a specimen, such as an integrated circuit chip, utilizing an electron probe has a grating structure for measuring the energy distribution of the secondary electrons independently of the angular distribution of the secondary electrons at the measuring point on the specimen. If the secondary electron spectrometer has an extraction electrode and a deceleration electrode, the grating structure is spherically symmetric.