The Intel 4004 used MOS (metal–oxide–semiconductor) transistors.
What has been the transistor types used in Intel processors onwards from the 4004 to 8085 to the x86 family of instruction set architectures?
There are probably complications such as maybe some processors are composed of more than one transistor type or there may be more than say ten different transistor types, from the 4004 to present day. So if needed to simplify the answer detailing the main transistor types used or trends would be fine.
Any commentary on advantages of a change of transistor type over the previous one is also welcome.