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原帖由: R Trent ,

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To elaborate, the iPad uses Package on Package construction for the processor and RAM, which means that the A4 chip contains both the processor and the RAM in the same ceramic enclosure (chip).

For a more exhaustive explanation, and a view inside, check [guide|2204|THIS] out.

You may find [http://en.wikipedia.org/wiki/Package_on_package|THIS] informative as well.

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