Patents Assigned to PicoCal, Inc.
  • Patent number: 8156568
    Abstract: This invention addresses a contact mode hybrid scanning system (HSS), which can be used for measuring topography. The system consists of a cantilever or a cantilever array, a scanning stage, a light source, and instrumentation to synchronize and control the individual components. Detection of the cantilever's movement is achieved by directly measuring the change in disposition of the cantilever including its height, rotation at one or more points on the cantilever thereby providing a partial three-dimensional reconstruction without the need for actuating the cantilever. This is achieved by employing a displacement meter such as a triangulation meter or a confocal meter.
    Type: Grant
    Filed: April 16, 2008
    Date of Patent: April 10, 2012
    Assignee: Picocal, Inc.
    Inventors: Angelo Gaitas, Yogesh B. Gianchandani
  • Patent number: 7262066
    Abstract: Systems and methods are described for identifying characteristics and defects in material such as semiconductors. Methods include scanning a thermal probe in the vicinity of a semiconductor sample, applying stimuli to the thermal probe, and monitoring the interaction of the thermal probe and the semiconductor. The stimulus can be applied by a variety of methods, including Joule heating of a resistor in the proximity of the probe tip, or optically heating a tip of the thermal probe using a laser. Applications of the invention include identification of voids in metallic layers in semiconductors; mapping dopant concentration in semiconductors; measuring thickness of a sample material; mapping thermal hot spots and other characteristics of a sample material.
    Type: Grant
    Filed: September 1, 2005
    Date of Patent: August 28, 2007
    Assignee: PicoCal, Inc.
    Inventors: Shamus McNamara, Yogesh B. Gianchandani