Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > Positive photo resists are used more than neg...
Start Learning for Free
Positive photo resists are used more than negative photo resists because:
- a)Negative photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the positive photo resists
- b)Positive photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the negative photo resists
- c)Negative photo resists are less sensitive to light
- d)Positive photo resists are less sensitive to light
Correct answer is option 'A'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Positive photo resists are used more than negative photo resists becau...
Negative photo resists are more sensitive to light, but their photo lithographic resolution is not as high as that of the positive photo resists. Therefore, negative photo resists are-used less commonly in the manufacturing of high-density integrated circuits.
Most Upvoted Answer
Positive photo resists are used more than negative photo resists becau...
Explanation:
Positive and negative photoresists are two types of light-sensitive materials used in the process of photolithography, which is a key technique in the fabrication of microelectronic devices. Both types of photoresists are used to transfer a pattern onto a substrate by exposing them to light and selectively removing the exposed or unexposed regions.
Difference between positive and negative photoresists:
Positive photoresists:
- Positive photoresists become more soluble in a developer solution when exposed to light.
- When positive photoresists are exposed to light, the exposed regions undergo a chemical reaction that increases their solubility.
- The unexposed regions remain relatively insoluble and act as a protective layer.
- Therefore, positive photoresists are used in a positive-tone process, where the exposed areas are removed during development, leaving behind the desired pattern on the substrate.
Negative photoresists:
- Negative photoresists become less soluble in a developer solution when exposed to light.
- When negative photoresists are exposed to light, the exposed regions undergo a chemical reaction that decreases their solubility.
- The unexposed regions remain relatively soluble and are removed during development.
- Therefore, negative photoresists are used in a negative-tone process, where the unexposed areas are removed, leaving behind the desired pattern on the substrate.
Reason for using positive photoresists more:
The correct answer to the given question is option 'A', which states that negative photoresists are more sensitive to light but have lower photolithographic resolution compared to positive photoresists. Here's the explanation:
Sensitivity to light:
- Negative photoresists are indeed more sensitive to light compared to positive photoresists.
- This means that a lower amount of light exposure is required to initiate a chemical reaction in negative photoresists.
- Higher sensitivity can be advantageous in certain applications where fine patterns need to be resolved.
Photolithographic resolution:
- Photolithographic resolution refers to the ability to create fine features or resolve small details in a pattern.
- Positive photoresists generally have higher resolution compared to negative photoresists.
- This is because the chemical reaction in positive photoresists is more localized and confined to the exposed regions, resulting in sharper pattern transfer.
- Negative photoresists, on the other hand, tend to exhibit more diffusion of the chemical reaction, leading to reduced resolution.
Conclusion:
In summary, the use of positive photoresists is more prevalent than negative photoresists in the field of photolithography because positive photoresists offer higher resolution despite being less sensitive to light. The choice between positive and negative photoresists depends on the specific requirements of the application and the desired pattern transfer characteristics.
Positive and negative photoresists are two types of light-sensitive materials used in the process of photolithography, which is a key technique in the fabrication of microelectronic devices. Both types of photoresists are used to transfer a pattern onto a substrate by exposing them to light and selectively removing the exposed or unexposed regions.
Difference between positive and negative photoresists:
Positive photoresists:
- Positive photoresists become more soluble in a developer solution when exposed to light.
- When positive photoresists are exposed to light, the exposed regions undergo a chemical reaction that increases their solubility.
- The unexposed regions remain relatively insoluble and act as a protective layer.
- Therefore, positive photoresists are used in a positive-tone process, where the exposed areas are removed during development, leaving behind the desired pattern on the substrate.
Negative photoresists:
- Negative photoresists become less soluble in a developer solution when exposed to light.
- When negative photoresists are exposed to light, the exposed regions undergo a chemical reaction that decreases their solubility.
- The unexposed regions remain relatively soluble and are removed during development.
- Therefore, negative photoresists are used in a negative-tone process, where the unexposed areas are removed, leaving behind the desired pattern on the substrate.
Reason for using positive photoresists more:
The correct answer to the given question is option 'A', which states that negative photoresists are more sensitive to light but have lower photolithographic resolution compared to positive photoresists. Here's the explanation:
Sensitivity to light:
- Negative photoresists are indeed more sensitive to light compared to positive photoresists.
- This means that a lower amount of light exposure is required to initiate a chemical reaction in negative photoresists.
- Higher sensitivity can be advantageous in certain applications where fine patterns need to be resolved.
Photolithographic resolution:
- Photolithographic resolution refers to the ability to create fine features or resolve small details in a pattern.
- Positive photoresists generally have higher resolution compared to negative photoresists.
- This is because the chemical reaction in positive photoresists is more localized and confined to the exposed regions, resulting in sharper pattern transfer.
- Negative photoresists, on the other hand, tend to exhibit more diffusion of the chemical reaction, leading to reduced resolution.
Conclusion:
In summary, the use of positive photoresists is more prevalent than negative photoresists in the field of photolithography because positive photoresists offer higher resolution despite being less sensitive to light. The choice between positive and negative photoresists depends on the specific requirements of the application and the desired pattern transfer characteristics.
Attention Electrical Engineering (EE) Students!
To make sure you are not studying endlessly, EduRev has designed Electrical Engineering (EE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Electrical Engineering (EE).
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Top Courses for Electrical Engineering (EE)View all
Positive photo resists are used more than negative photo resists because:a)Negative photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the positive photo resistsb)Positive photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the negative photo resistsc)Negative photo resists are less sensitive to lightd)Positive photo resists are less sensitive to lightCorrect answer is option 'A'. Can you explain this answer?
Question Description
Positive photo resists are used more than negative photo resists because:a)Negative photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the positive photo resistsb)Positive photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the negative photo resistsc)Negative photo resists are less sensitive to lightd)Positive photo resists are less sensitive to lightCorrect answer is option 'A'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Positive photo resists are used more than negative photo resists because:a)Negative photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the positive photo resistsb)Positive photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the negative photo resistsc)Negative photo resists are less sensitive to lightd)Positive photo resists are less sensitive to lightCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Positive photo resists are used more than negative photo resists because:a)Negative photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the positive photo resistsb)Positive photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the negative photo resistsc)Negative photo resists are less sensitive to lightd)Positive photo resists are less sensitive to lightCorrect answer is option 'A'. Can you explain this answer?.
Positive photo resists are used more than negative photo resists because:a)Negative photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the positive photo resistsb)Positive photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the negative photo resistsc)Negative photo resists are less sensitive to lightd)Positive photo resists are less sensitive to lightCorrect answer is option 'A'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Positive photo resists are used more than negative photo resists because:a)Negative photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the positive photo resistsb)Positive photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the negative photo resistsc)Negative photo resists are less sensitive to lightd)Positive photo resists are less sensitive to lightCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Positive photo resists are used more than negative photo resists because:a)Negative photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the positive photo resistsb)Positive photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the negative photo resistsc)Negative photo resists are less sensitive to lightd)Positive photo resists are less sensitive to lightCorrect answer is option 'A'. Can you explain this answer?.
Solutions for Positive photo resists are used more than negative photo resists because:a)Negative photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the positive photo resistsb)Positive photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the negative photo resistsc)Negative photo resists are less sensitive to lightd)Positive photo resists are less sensitive to lightCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE).
Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free.
Here you can find the meaning of Positive photo resists are used more than negative photo resists because:a)Negative photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the positive photo resistsb)Positive photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the negative photo resistsc)Negative photo resists are less sensitive to lightd)Positive photo resists are less sensitive to lightCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Positive photo resists are used more than negative photo resists because:a)Negative photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the positive photo resistsb)Positive photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the negative photo resistsc)Negative photo resists are less sensitive to lightd)Positive photo resists are less sensitive to lightCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for Positive photo resists are used more than negative photo resists because:a)Negative photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the positive photo resistsb)Positive photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the negative photo resistsc)Negative photo resists are less sensitive to lightd)Positive photo resists are less sensitive to lightCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of Positive photo resists are used more than negative photo resists because:a)Negative photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the positive photo resistsb)Positive photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the negative photo resistsc)Negative photo resists are less sensitive to lightd)Positive photo resists are less sensitive to lightCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Positive photo resists are used more than negative photo resists because:a)Negative photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the positive photo resistsb)Positive photo resists are more sensitive to light, but their photo lithographic resolutionis not as high as that of the negative photo resistsc)Negative photo resists are less sensitive to lightd)Positive photo resists are less sensitive to lightCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
|
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup