Patents Assigned to Photmetrics, Ltd.
  • Electrical access to a hermetically sealed chamber using a printed circuit board
    Patent number: 5393931
    Abstract: A vacuum chamber housing a cooled CCD for a CCD camera has a hermetic seal provided by a closed loop pattern on the surface of a laminate, printed circuit board having subteranean conductor traces. Electrical access to the CCD is provided, via the traces, by a universal pattern of pivouts subsets of which correspond to the pin patterns of different CCDs. Large numbers of pin connection patterns are achieved by this technique without leaks. A single board embodiment and a mother-daughter board embodiment are described.
    Type: Grant
    Filed: March 4, 1993
    Date of Patent: February 28, 1995
    Assignee: Photmetrics, Ltd.
    Inventor: Derek P. Guenther