Advanced transistors (FinFET and GAA)

What is the purpose of using several types of transistors with different threshold voltages on the same chip?

  1. ATo decorate the chip
  2. BTo use low-threshold transistors where speed is needed and high-threshold ones where leakage should be low, balancing performance and power
  3. CTo make the threshold voltage unmeasurable
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Answer: B. To use low-threshold transistors where speed is needed and high-threshold ones where leakage should be low, balancing performance and power

Low-threshold transistors are fast but leaky, and high-threshold ones are slower but leak less. Using low-threshold transistors only on timing-critical paths and high-threshold ones elsewhere keeps performance while reducing standby power.

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More Advanced transistors (FinFET and GAA) questions

  1. Which technique covers the gate with insulator so that a slightly misaligned contact does not short to the gate?
  2. Why are SiGe and germanium considered or adopted instead of silicon as pMOS channel materials?
  3. Which 3D integration method builds transistor layers one after another on the wafer, without bonding chips?
  4. Which company and generation first put FinFETs (called Tri-Gate by Intel) into volume-production logic products?
  5. Which company and generation were first to announce volume production of GAA (nanosheet) transistors?