Abstract:
An apparatus for imaging an internal component of a non-homogeneous structure comprising an imaging system with either at least one camera having a plurality of filters of different wavelength pass bands associated therewith, or, a plurality of cameras of different imaging wavelength for imaging in one or more wavelength ranges wherein an external portion of the structure allows passage of radiation at a wavelength in the wavelength range and the internal component is essentially opaque at the wavelength.
Abstract:
L'invention concerne un procédé d'analyse d'un circuit intégré. Le procédé comporte, pour une pluralité de points ô la surface du circuit intégré : - une étape d'application (102) d'un rayonnement laser, en un point de la surface du circuit intégré : une étape (106) d'excitation du circuit ; une étape (108) de recueil de la réponse du circuit ô l'excitation ; une étape (114) de calcul du temps de propagation séparant l'instant d'excitation du circuit de l'instant de recueil de la réponse ; et une étape (116) de création d'une image du circuit intégré illustrant une valeur représentative du temps de propagation pour chaque point d'application du rayonnement laser. L'invention concerne également une installation d'analyse d'un circuit intégré.
Abstract:
A testing apparatus for a radiation sensing integrated circuit comprises a load board (101), a test socket (102), suitable for the device under test DUT (103), and a plunger (104). A radiation source (107) is provided on the load board (101) adjacent to the test socket (102). The radiation source (107) generates radiation for testing the response to stimulus of the radiation sensing element of the DUT (103). To enable the sensing element of the DUT (103) to be exposed to the radiation, a pathway (108) is provided through plunger (104). The pathway (108) has a U-Shape with the end of one side of the U being adjacent to the radiation source (107) and the other end of the U being adjacent to the sensing element of DUT (103). Prisms (105, 106) are mounted at the base of each side of the U so as to reflect incident light along the pathway (108), such that radiation entering the pathway (108) from the radiation source (107), travels along the U and exits the other end of the U where it is then incident upon the radiation sensing element of DUT (103).
Abstract:
An interface device receives test data from a tester. A signal representing the test data is transmitted to a device under test through electromagnetically coupled structures on the interface device and the device under test. The device under test processes the test data and generates response data. A signal representing the response data is transmitted to the interface device through electromagnetically coupled structures on the device under test and the interface device.
Abstract:
A method (Figure 2) for analyzing photon emission data to discriminate between photons emitted by transistors and photons emitted by background sources. The analysis involves spatial and/or temporal correlation of photon emissions (200). After correlation, the analysis may further involve obtaining a likelihood that the correlated photons were emitted by a transistor (230). After correlation, the analysis may also further involve assigning a weight to individual photon emissions as a function of the correlation. The weight, in some instances, reflecting a likelihood that the photons were emitted by a transistor. The analysis may further involve automatically identifying transistors in a photon emission image.
Abstract:
PICA probe system methods and apparatus are described, including methods and apparatus for calibrating an event timer having a coarse measurement capability in which time intervals defined by clock boundaries are counted and a fine measurement capability in which time between boundaries is interpolated using a voltage ramp.
Abstract:
A sub-micron probe apparatus (101) to be added to an existing probe station (113). In one embodiment, the probe apparatus includes a course positioning unit to be optionally mounted or added to an existing probe station platform. A fine positioning unit is attached to an arm attached to the course positioning unit (103). A cantilever having a tip is attached to a support structure attached to the fine positioning unit. The course and fine positioning units are used to place the cantilever (105) and tip (107) over a surface of a device under test (DUT) (119). Motion of the cantilever is detected with a motion sensor (111). An image of the surface of the DUT may be obtained. In addition, an electrical signal carried in an electrical trace on or near the surface of the DUT can be detected. An electrical signal may also be supplied to the electrical trace on or near the surface of the DUT. The field of vision of an optical imager (115) used to image the DUT at the probe area is not obstructed by the probe apparatus.
Abstract:
A structure (10) having a number of traces (11A-11N) passing through a region (11) is evaluated by using a beam (12) of electromagnetic radiation to illuminate the region, and generating an electrical signal that indicates an attribute of a portion (also called "reflected portion") of the beam reflected from the region. The just-described acts of "illuminating" and "generating" are repeated in another region, followed by a comparison of the generated signals to identify variation of a property between the two regions. Such measurements can identify variations in material properties (or dimensions) between different regions in a single semiconductor wafer of the type used in fabrication of integrated circuit dice, or even between multiple such wafers. In one embodiment, the traces are each substantially parallel to and adjacent to the other, and the beam has wavelength greater than or equal to a pitch between at least two of the traces. In one implementation the beam is polarized, and can be used in several ways, including, e.g., orienting the beam so that the beam is polarized in a direction parallel to, perpendicular to, or at 45 DEG to the traces. Energy polarized parallel to the traces is reflected by the traces, whereas energy polarized perpendicular to the traces passes between the traces and is reflected from underneath the traces. Measurements of the reflected light provide an indication of changes in properties of a wafer during a fabrication process.