Question

Give the thickness range of the film used in thin film technology

(a) 0.5-2.5 mils

(b) 0.02-8 mils

(c) 10-20 mils

(d) 0.05-0.0 7mils

I got this question in unit test.

Question is from Thin Film and Thick Film Technology in division IC Fabrication of Linear Integrated Circuits

Answer 1

Thin Film Technology - Thickness Range

Correct Answer: (a) 0.5-2.5 mils

Explanation:

Thin film technology uses films with thickness ranging from 0.5 to 2.5 mils (micrometers). This range distinguishes thin film from thick film technology.

Thin Film Definition:

Films deposited in layers with thickness 0.1 to 10 micrometers. The term 'thin' refers to the deposition technique and film thickness, typically less than 1-10 micrometers.

Comparison with Thick Film:

Thick Film: 10-100 micrometers (10-100 mils)

Thin Film: 0.5-2.5 micrometers (0.5-2.5 mils)

Thin Film Methods:

- Vacuum evaporation

- Sputtering

- Chemical vapor deposition (CVD)

- Molecular beam epitaxy (MBE)

Applications:

- Resistors and capacitors in ICs

- Microelectronics

- Thin film transistors

- Solar cells

- Optical coatings

Conclusion:

Thin film technology uses films with thickness 0.5-2.5 mils, distinguishing it from thicker film technologies used in hybrid circuits.