กระทู้เก่า - 04867 : ccd problem

 ccd problem

http://www.imaging-resource.com/NEWS/1128958202.html

brookloach  [ 15/10/2548 1:46:5 ]

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tumdeejai [15/10/2548 19:41:51]

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brookloach [15/10/2548 23:24:54]

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In each case, the story has been similar - CCD sensor failures (particularly in conditions of high heat and humidity) leading to cameras that capture images with either no picture at all, or with extreme distortion and purple color casts.

tumdeejai [16/10/2548 18:34:51]

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Quote from Imaging Resorces:
"Thus far, Sony itself has announced a repair program, as have three other digital camera manufacturers - Canon, Fujifilm and Konica Minolta. We fully expect to see additional repair programs announced by other digital camera manufacturers in the near future. The full extent of the problem isn't known, but information provided by Sony regarding their own repair program says that the affected cameras were manufactured between October 2002 and March 2004. It should be noted that these are manufacturing dates, though - cameras manufactured in March 2004 could easily have still been on retail shelves through the end of that year, and possibly even into early 2005. It should also be noted that with all of the manufacturers, the problem affects only certain specific models - many cameras manufactured during the period in question will be completely unaffected.

The root cause of the problem is only hinted at by the advisories, but in our investigation of the problem we've uncovered more specific information. Semiconductor chips can be assembled into a variety of different package types and styles. Most chips these days are delivered in plastic (epoxy, actually) packages that are inexpensive, but that may not offer environmental protection as good as that of more expensive ceramic package types. Apparently, the generation of Sony sensors affected by the problem were packaged in plastic, and the design or manufacturing parameters for the packages involved resulted in their being susceptible to elevated moisture and humidity levels in typical digital camera usage. Only in very unusual circumstances (high heat, very high humidity, high pressure) does this quickly lead to a problem. In most cases, it takes a very long time for moisture to creep into a plastic chip package. Hence, only now, two or more years after the earliest of the cameras affected by this were manufactured, are we starting to see a widespread pattern of problems.

Based on what we've heard behind the scenes, the "fix" was actually a pretty simple one: Just bite the bullet and use the more expensive ceramic chip packaging. Since camera makers seldom identify the exact supplier and model of imager they're using, we have no direct way of knowing whether current cameras are actually shipping with ceramic chip packages on their CCDs. Still, it's likely that the various manufacturers will be operating in a "once bitten, twice shy" mode for the foreseeable future. Interestingly, while the scale of the repair programs are likely to be a significant nuisance for the camera makers, at least one source has told us that the cost of the repairs is actually being borne by Sony, not the individual camera makers. (Kudos to Sony if this is the case.)"

brookloach [17/10/2548 0:51:21]

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 [17/10/2548 9:43:42]

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 [17/10/2548 9:49:31]

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 [19/10/2548 23:26:42]