Focused Ion Beam (FIB) Technique

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Questions and Answers

What is the main purpose of Focused Ion Beam (FIB) technique?

To analyze, deposit, and ablate materials at specific sites (correct)
To study biological fields
To image the sample using a focused beam of electrons
To resemble a scanning electron microscope (SEM)

How does a Scanning Electron Microscope (SEM) differ from Focused Ion Beam (FIB)?

SEM uses a focused beam of ions, while FIB uses a focused beam of electrons (correct)
SEM is primarily for ablation of materials, while FIB is for deposition of materials
SEM is employed for biological analysis, while FIB is used for imaging samples
SEM is used in the semiconductor industry, while FIB is used in materials science

Which industry or field extensively utilizes Focused Ion Beam (FIB) technique?

Cosmetic industry
Biological field
Semiconductor industry
Materials science (correct)

What happens when the gallium wets the tungsten and flows to the tip of the needle?

Gallium atoms are ionized and experience field emission (A) Signup and view all the answers

What is the purpose of the gallium ion source in Ion Beam Source Instruments?

To accelerate the gallium atoms to 1-50keV (B) Signup and view all the answers

How are the gallium ions focused onto the sample in Ion Beam Source Instruments?

By using an electrostatic lense (B) Signup and view all the answers

What is the purpose of the gallium ion source in Ion Beam Source Instruments?

To generate a high electric field for ionization and field emission (A) Signup and view all the answers

What effect does the huge electric field at the small tip of the gallium ion source have?

Causes ionization and field emission of the gallium atoms (D) Signup and view all the answers

What happens when the heated gallium wets the tungsten and flows to the tip of the needle?

The opposing forces of surface tension and electric field form the gallium into a cusp shaped tip called a Taylor cone (C) Signup and view all the answers

Flashcards

FIB main purpose?

To analyze, deposit, and ablate materials at specific sites.

SEM vs. FIB?

SEM uses electrons; FIB uses ions.