But I´m pretty sure with more magnification it would still be hard to get more details. Unfortunately the structures are too small to get more details. Take a closer look.the output stages are different in size. Normally that´s the most negative potential, GND in this case. At the upper edge there is a bondpad directly connecting the metal frame and on the left side there is a bondpad that is connected to the outer frame that probably connects the substrate. It´s possible to identify the supply contacts too. There are also some more vertical lines probably the output stages. Above the output bondpads you can see two horizontal slots that are probably connections to the supply. The input bondpads (left side) have smaller connections than the output bondpads (right side). It´s possible to distinguish the inputs and outputs. There is one testpad in the upper left corner. Could be a high voltage generator for an EEPROM. There is an additional small circuit right of the memory (?) circuit outside of the supply frame. We can´t be sure what the special structure in the upper right corner does. You can see the bigger lines on top of the other. There are at least two layers of interconnection probably more. The standard cells are too small to be identified. Between the horizontal supply lines there are the interconnections around the standard cells. You can see the horizontal and the vertical supply lines. ![]() In the upper right corner there is something different. Most of the area is occupied by standard logic. But what should this structure tell us? Too small. The small circuit on the left could be a clock generator. There is quite a big frame supplying the circuit. ![]() The epoxy was a little pig-headed but I finally was able to remove most of it.
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