From: Michael Huth (enigma_at_mail.lipsia.de)
Date: 2008-05-31 17:23:59
Hello, I have put together a page with links to everything that is online on my webspace. Don't stress it too much, I officially have unlimited but that was setup in 1997. ;-) So check this out: http://mail.lipsia.de/~enigma/neu/6581.html I will update this page if something new is recorded. Wolfgang Moser wrote: >> I got the SID from Tommi Lempinen today and used this friday late >> afternoon for a recording session in front of the microscope. >> > I see you got a 6581R3. Came it in ceramic package > or black plastic? If the latter, how did you remove > the plastic, is the shadow in the upper left corner > some remaining plastic? > According to Tommi Lempinen the SID was burnt out of the plastic package. Maybe he can say some words to his method. You might also notice that some metal circuity on the die appears nealy black decorated with dirt. Could be related to the package opening. >> Right side of Filter circuit in higher resolution: >> http://mail.lipsia.de/~enigma/sid6581r3/filter_q15_50percent.jpg >> Focus plane is on the brown layers >> > > _That_ resolution is truly orgasmic. Wow. > I am not yet satisfied with the quality and will ask if this high resolution needs some special treatment, like aperture or other special microscope configuration. >> Some more images with focus plane on the topmost metal layer: >> http://mail.lipsia.de/~enigma/sid6581r3/filterdetail1_q15.jpg >> http://mail.lipsia.de/~enigma/sid6581r3/filterdetail2_q15.jpg >> http://mail.lipsia.de/~enigma/sid6581r3/filterdetail3_q15.jpg >> > If the whole chip would be photographed with > such a resolution, how big would the resulting > image become, if uncompressed? 8 Gigabytes? > You can see the scale in the lower left corner, so it is around 10x. This means 10x10 = 100 times more images. The image above was stitched from 20 single images. > Oh, not that I am requesting you to do the whole > chip with that resolution, that may be an option > for the far future ;-) > It is not really an option because: You need an automatic recording with remote control of the XY-table drive. It is nearly impossible to adjust the die the way that it is exactly in normal direction, meaning that the focus plane distance does not shift if driving to another location. This implies you adjust the focus length each X micrometer to the same plane, f.e. the brown one again -> automatically. This also required an automatic high precise drive for the object distance of the microscopy (Z-drive for table). While there is no automatic Z-drive currently it would also be a difficult job to program an algorithm that adjusts the sharpness to a specific plane. (There are also areas, where a specific plane is not visible at all). So this would be really just for the far future.... Ciao... ...Micha Message was sent through the cbm-hackers mailing list
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