Podcast
Questions and Answers
True or false: Alloying is a common method for fabricating pn junctions
True or false: Alloying is a common method for fabricating pn junctions
True
True or false: Heating the indium and germanium mixture to about 500ºC forms a small puddle of molten germanium-indium mixture
True or false: Heating the indium and germanium mixture to about 500ºC forms a small puddle of molten germanium-indium mixture
True
True or false: The addition of indium creates a p-type region in the n-type germanium
True or false: The addition of indium creates a p-type region in the n-type germanium
True
True or false: The remaining material after the process appears as an indium button frozen onto the outer surface of the crystallized portion
True or false: The remaining material after the process appears as an indium button frozen onto the outer surface of the crystallized portion
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True or false: The process of forming a pn junction using alloying involves heating the system to a temperature of about 1000ºC.
True or false: The process of forming a pn junction using alloying involves heating the system to a temperature of about 1000ºC.
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True or false: The indium button serves as a suitable base for soldering on leads in the process of forming a pn junction using alloying.
True or false: The indium button serves as a suitable base for soldering on leads in the process of forming a pn junction using alloying.
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True or false: The remaining molten mixture becomes increasingly rich in germanium as the process of forming a pn junction using alloying goes on.
True or false: The remaining molten mixture becomes increasingly rich in germanium as the process of forming a pn junction using alloying goes on.
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True or false: The addition of indium overcomes the excess of holes in the n-type germanium to create a p-type region in the process of forming a pn junction using alloying.
True or false: The addition of indium overcomes the excess of holes in the n-type germanium to create a p-type region in the process of forming a pn junction using alloying.
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True or false: The addition of indium creates an n-type region in the n-type germanium
True or false: The addition of indium creates an n-type region in the n-type germanium
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True or false: The process of forming a pn junction using alloying involves the use of a trivalent impurity
True or false: The process of forming a pn junction using alloying involves the use of a trivalent impurity
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True or false: The system is heated to a temperature of about 500ºC in the process of forming a pn junction using alloying
True or false: The system is heated to a temperature of about 500ºC in the process of forming a pn junction using alloying
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True or false: The remaining material after the process appears as an indium button frozen onto the outer surface of the crystallized portion
True or false: The remaining material after the process appears as an indium button frozen onto the outer surface of the crystallized portion
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Study Notes
Alloying in pn Junction Formation
- Alloying is a common method for fabricating pn junctions.
- Heating the indium and germanium mixture to about 500ºC forms a small puddle of molten germanium-indium mixture.
- The addition of indium creates a p-type region in the n-type germanium.
- The remaining material after the process appears as an indium button frozen onto the outer surface of the crystallized portion.
- The process of forming a pn junction using alloying involves heating the system to a temperature of about 500ºC.
- The indium button serves as a suitable base for soldering on leads in the process of forming a pn junction using alloying.
- The remaining molten mixture becomes increasingly rich in germanium as the process of forming a pn junction using alloying goes on.
- The addition of indium overcomes the excess of electrons in the n-type germanium to create a p-type region in the process of forming a pn junction using alloying.
- The addition of indium creates a p-type region in the n-type germanium.
- The process of forming a pn junction using alloying involves the use of a trivalent impurity.
- The system is heated to a temperature of about 500ºC in the process of forming a pn junction using alloying.
- The remaining material after the process appears as an indium button frozen onto the outer surface of the crystallized portion.
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Description
Learn about the fabrication of a pn junction using the alloying method, which involves placing a small block of indium on an n-type germanium slab and heating it to form a molten germanium-indium mixture. Understand the process of lowering the temperature to solidify the mixture and create the pn junction.
