NPTEL Sensors and Actuators Week 10 Assignment Answers 2025
1. Which amongst the following is used as a photoresist stripper?
- Ethanol
- BHF
- Isopropyl alcohol
- None of the above
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2. HMI was introduced as the control for the Thermal/E-beam evaporator system. What does HMI mean?
- High Maintenance Interface
- Human Machine Interface
- Heavy Machine Interface
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3. Which properties of breast tissues have been characterized using the fabricated piezoresistive microcantilever?
- Electrical
- Mechanical
- Both Electrical and Mechanical
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4. Complete the following statement:
The microsensor with __ is used for characterizing the electrical properties of the breast tissues using impedance measurements.
- Microheater
- Cantilever
- SU-8 well
- Interdigitated electrodes
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5. Which material is used as base material to provide better adhesion to gold film during the fabrication of interdigitated electrodes?
- Nickel
- Tungsten
- Silver
- Chromium
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6. Evaluate whether the below statement is true or false:
“Breast cancer is the second largest cause of cancer-related female deaths in the world accounting for 12 % amongst all cancers.”
- True
- False
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7. During photolithography, soft bake and hard bake are performed at which temperatures in general?
- 90°C and 110°C
- 110°C and 90°C
- 120°C and 90°C
- 90°C and 120°C
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8. Evaluate whether the below statement is true or false:
“Turbo molecular pump is used to provide the initial vacuum in the physical deposition system demonstrated in the lecture video.”
- True
- False
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9. What is the reason for using PECVD for depositing silicon dioxide during the fabrication of Piezoresistive microcantilever?
- Easy process
- Less time-consuming process
- Low temperature process
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10. For the interdigitated electrode-based electrical characterization of breast cancer tissues, SU8 photoresist was used in the process flow. Which of the following holds TRUE for SU-8?
- SU-8 is a positive photoresist.
- SU-8 is a negative photoresist.
- SU-8 is used for photoresist adhesion to the substrate.
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