Radiant energy – Invisible radiant energy responsive electric signalling – With means to inspect passive solid objects
Reexamination Certificate
2005-03-29
2005-03-29
Hannaher, Constantine (Department: 2878)
Radiant energy
Invisible radiant energy responsive electric signalling
With means to inspect passive solid objects
C250S36100C, C378S054000, C378S056000, C324S501000
Reexamination Certificate
active
06872949
ABSTRACT:
Brightness information of, for example, an average value of brightnesses at an X-ray image of a first connected part when an electronic component is mounted onto only one face of a printed board is obtained. Binary images of an X-ray image of the board with the electronic components mounted to both faces are formed by an upper and a lower levels relative to the brightness information. The binary images are synthesized with each other so as to extract an image of only a second connected part. The image of only the second connected part can be obtained in this manner on the basis of the X-ray image of the double face-mounted board, so that an accuracy for connection inspection is improved. Also, a relationship between a density in the X-ray image of the connected part and a thickness of the connected part is obtained beforehand, based on which a plurality of thickness images are obtained for a plurality of X-ray images of different image storage times. The connected part can be inspected by synthesizing the images.
REFERENCES:
patent: 4926452 (1990-05-01), Baker et al.
patent: 5836504 (1998-11-01), Koike et al.
patent: 6201850 (2001-03-01), Heumann
patent: 6256406 (2001-07-01), Garland et al.
Ichihara Masaru
Kubota Haruko
Mizuoka Seiji
Okumura Kazumasa
Suzuki Noriyuki
Hannaher Constantine
Lee Shun
Wenderoth , Lind & Ponack, L.L.P.
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