Tech-On: Matsushita engineers spent some time investigating their arch-rival Sony CCD problems. To solve these problems Sony has stopped using ultraviolet cured resin containing iodine to bond CCD packages since the defect was discovered.
What Matsushita found is that the corrosion was closely related not only to iodine but also fluorine, which becomes alienated from ultraviolet cured resin, and bonding condition of the wire-bonded area.
So the ultraviolet cured resin containing iodine can possibly be used to bond CCD packages with its reliability undamaged, if a right kind of ultraviolet cured resin, from which fluorine does not become estranged, is chosen and intensity of wire bonding is enhanced.
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