Especially at first, the high-purity ingots were left over from integrated-circuit manufacture, but later the process was used to make PV cells themselves, Rogol recounts.

• 罗葛指出，特别是在初期，高纯度晶棒只是积体电路制造业的剩馀产物，但后来这项制程主要用来制造光伏电池。