Are pentiums and i3 fabricated and cut from the same sheet of silicon?

speaking strictly of desktop CPUs. After all the layers are connected, stacked, cut, and tested;

are the pentiums just binned i3 that didnt pass "the grade" or exceeded their TDP

so they turn off some of the cache and turn down the multiplier

i would assume the same could be said about the i5 and i7. And could mobile CPUs related to desktop CPUs in a similar technique.

I know some i7 were really Xeons put on a different sockets and nVidias quadro line are cherry picked GTX chips. And BTW i am speaking of the current pentiums not like pentium 4

for example how many different sets of blueprints would intel need if they release 20 variations of a desktop CPUs under the same family and version but different clock speed, cores, cache, etc. Like devils canyon or ivy bridge.

any links to useful information would be helpful

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