Podcast
Questions and Answers
What is the primary purpose of the epitaxial layer in a bipolar circuit?
What is the primary purpose of the epitaxial layer in a bipolar circuit?
- To provide isolation between devices
- To control the doping concentration in the device (correct)
- To serve as the base region of the transistor
- To act as a conducting layer for the circuit
What is the main purpose of the intermetal dielectric (IMD) layers in a device structure?
What is the main purpose of the intermetal dielectric (IMD) layers in a device structure?
- To enhance the thermal conductivity of the device
- To control the stress in the device structure
- To act as a conducting path between metal layers
- To provide electrical insulation between metal layers (correct)
Which of the following is NOT a common technique for layer deposition in semiconductor device fabrication?
Which of the following is NOT a common technique for layer deposition in semiconductor device fabrication?
- Sputtering
- Physical vapor deposition
- Chemical vapor deposition
- Spin coating (correct)
What is the primary purpose of the final passivation layer in a semiconductor device?
What is the primary purpose of the final passivation layer in a semiconductor device?
What is the main advantage of using the dual-damascene process for metal deposition?
What is the main advantage of using the dual-damascene process for metal deposition?
Which of the following is NOT a general criterion that all films must meet for semiconductor use?
Which of the following is NOT a general criterion that all films must meet for semiconductor use?
What was the main performance barrier that aluminum metallization ran into as circuits reached 100MHz speeds?
What was the main performance barrier that aluminum metallization ran into as circuits reached 100MHz speeds?
What is the main advantage of using copper over aluminum as a conducting metal?
What is the main advantage of using copper over aluminum as a conducting metal?
What are some of the drawbacks of using copper as a conducting metal?
What are some of the drawbacks of using copper as a conducting metal?
What are some of the deposition methods that can be used for copper?
What are some of the deposition methods that can be used for copper?
What was the resistance value of aluminum compared to copper?
What was the resistance value of aluminum compared to copper?
What companies were the first to announce the availability of production copper-based devices?
What companies were the first to announce the availability of production copper-based devices?
What is a key advantage of LPCVD systems?
What is a key advantage of LPCVD systems?
How is the pressure range typically reduced in an LPCVD system?
How is the pressure range typically reduced in an LPCVD system?
What is a disadvantage of using a hot-wall LPCVD system?
What is a disadvantage of using a hot-wall LPCVD system?
Why do some systems in LPCVD have injectors positioned directly over the wafers?
Why do some systems in LPCVD have injectors positioned directly over the wafers?
What additional component needs to be added to an LPCVD system to reduce pressure in the chamber?
What additional component needs to be added to an LPCVD system to reduce pressure in the chamber?
What is one advantage of the horizontal LPCVD system design discussed in the text?
What is one advantage of the horizontal LPCVD system design discussed in the text?
What is the main advantage of an epitaxial film in terms of doping?
What is the main advantage of an epitaxial film in terms of doping?
How is doping achieved in an epitaxial film?
How is doping achieved in an epitaxial film?
What is the classic epitaxial film used in bipolar technology?
What is the classic epitaxial film used in bipolar technology?
What is the purpose of the lower temperature used in epitaxial film growth?
What is the purpose of the lower temperature used in epitaxial film growth?
What is the upper limit of dopant concentration that can be achieved in an epitaxial film?
What is the upper limit of dopant concentration that can be achieved in an epitaxial film?
Which statement about in situ CVD doping is true?
Which statement about in situ CVD doping is true?
What advantage does doped polysilicon have?
What advantage does doped polysilicon have?
Why are polysilicon oxides considered to be of lower quality than thermal oxides grown on single-crystal silicon?
Why are polysilicon oxides considered to be of lower quality than thermal oxides grown on single-crystal silicon?
What is the solution to the problem of polysilicon having a high resistance to metal materials used for conductive leads?
What is the solution to the problem of polysilicon having a high resistance to metal materials used for conductive leads?
Which of the following is an advantage of LPCVD (Low-Pressure Chemical Vapor Deposition) for metal depositions?
Which of the following is an advantage of LPCVD (Low-Pressure Chemical Vapor Deposition) for metal depositions?
What is the key challenge in filling via holes with metal for effective multimetal systems?
What is the key challenge in filling via holes with metal for effective multimetal systems?
