AMD do not exclude the possibility of ordering Bulldozer processor microarchitecture from the world's largest contract chipmaker TSMC. This information is indirectly confirmed by the recent recognition of existence of problems with the release of 32-nm chips by the traditional partner Globalfoundries.
We assume that TSMC will manufacture the next generation APU, codenamed Trinity, the processor cores which are based on Piledriver architecture.
The CPU microarchitecture Bulldozer is made on the silicon on insulator (SOI) with the use of dielectrics with high dielectric constant and metal gate (high-K metal gate, HKMG); TSMC is somewhat late in the use of those technologies.