crwdns2894164:0crwdne2894164:0
crwdns2894186:0crwdne2894186:0
crwdns2875948:016crwdne2875948:0 —

crwdns2869020:0crwdne2869020:0:

crwdns2858926:0crwdne2858926:0

Before dismantling it, Chipworks took an X-ray image of the A4 processor to get a feel for how things are laid out inside.

If you look closely, you can see hundreds of thread-like interconnects (wirebonds) that carry electronic signals between dies.

The A4 has three layers: Two layers of RAM (Samsung K4X1G323PE), and one layer containing the actual microprocessor.

This Package-on-Package construction gives Apple the flexibility to source the RAM from any manufacturer they want—they're not locked into Samsung.

crwdns2859191:0crwdnd2859191:0crwdnd2859191:0crwdnd2859191:0crwdne2859191:0