We'd need two orders of magnitude more semiconductors than currently exist. We're already building them as fast as we can.
Global energy use for heating: ~150 trillion kWh/year
Waste heat from semiconductors: ~1 trillion kWh/year
Global energy use for heating: ~150 trillion kWh/year
Waste heat from semiconductors: ~1 trillion kWh/year
And then there are the other environmental impacts - waste chemicals, waster water, and greenhouse emissions.