Electronics and Communication Engineering - Electronic Devices and Circuits - Discussion

Discussion Forum : Electronic Devices and Circuits - Section 2 (Q.No. 2)
2.
What is the correct sequence of the following step in the fabrication of a monolithic, Bipolar junction transistor?
  1. Emitter diffusion
  2. Base diffusion
  3. Buried layer formation
  4. E pi-layer formation
Select the correct answer using the codes given below:
3, 4, 1, 2
4, 3, 1, 2
3, 4, 2, 1
4, 3, 2, 1
Answer: Option
Explanation:

It is always non-linear.

Discussion:
8 comments Page 1 of 1.

Rohit chand said:   6 months ago
The correct sequence for the given steps in the fabrication of a monolithic bipolar junction transistor (BJT) is as follows:.

Buried layer formation: This step involves creating a buried layer, usually heavily doped, beneath the collector region. It helps in preventing interference between transistors on the same substrate.

Epi-layer formation (Epi-layer refers to the epitaxial layer): An epitaxial layer, which is a thin, single crystal layer grown on the substrate, is formed. This layer will serve as the collector of the transistor.

Base diffusion: The base region is diffused into the epitaxial layer. This involves introducing a specific type of impurity to create either a P-type or N-type semiconductor material, depending on the type of BJT (NPN or PNP). The base region controls the flow of current between the emitter and collector.

Emitter diffusion: The emitter region, heavily doped to enhance conductivity, is diffused into the base region. This step finalizes the basic structure of the bipolar junction transistor.

So, the correct sequence is: 3. Buried layer formation -> 4. Epi-layer formation -> 2. Base diffusion -> 1. Emitter diffusion.
(1)

Taijul islam said:   3 years ago
C is the correct answer.

Jeevan Jagtap said:   4 years ago
Will anyone explain all the fabrication process?

Jeya said:   6 years ago
How it is nonlinear?

Komal said:   6 years ago
The Correct answer is C.

Aksharma said:   6 years ago
The correct answer is C.

Ayush kumar said:   6 years ago
The Correct answer is 'C'.

Pratiksha mali said:   9 years ago
Will you explain the fabrication process please?

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