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Why germanium controlled rectifiers are not used instead of silicon controlled rectifiers?
Wiki User
∙ 9y ago
The first solid state four layer thyristors made were indeed made of germanium and therefor could be called "germanium controlled rectifiers" (although this name was never used in the literature, they were just called thyristors). But when it became practical in the early 1960s to make solid state devices using silicon, the higher operating junction temperature and the ability to self passivate junctions in silicon devices soon made germanium devices obsolete especially for high power applications (which include many of the applications of solid state four layer thyristors).
The term thyristor was coined originally for these devices as they were seen as a solid state version of the gas filled thyratron tube. The idea of calling them "controlled rectifiers" only came years later when silicon had replaced germanium for most purposes in solid state devices.
Wiki User
∙ 9y ago
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Can you explain why silicon and germanium are used in the manufacturing of semiconductors?
silicon is less sensitive towards temperature.It costs low compared to germanium,
Why you use silicon not germanium in SCR?
because lekage current of silicon is less than germenium
What is the cut in voltage of germanium and silicon diodes?
cut in voltage *** for silicon is 0.7volts and that for germanium is 0.3volts.According to Millman and Taub, "Pulse, Digital and Switching Waveforms", McGraw-Hill 1965, the cutin (or offset, break-point or threshold) voltage for a silicon diode is 0.6, and 0.2 for germanium.Breakdown voltage is another thing entirely. It is the reverse voltage at which the junction will break down.
Why germanium and silicon are not preferred in LEDs?
A: Because the element has different property as gallium arsenide.
Why is the reverse saturation current of germanium diode more than silicon?
Germanium has four number of shells while Silicon has three number of shell. therefore for germanium less energy is required to move the electron from valence band to conduction band if compared to silicon. So at room temperature for germanium their are more number of electrons present in conduction bond hence more number of holes present in the valence energy band. Due to movement of holes reverse saturation current is produced. Their is more number of hole movement in germanium comparatively therefore reverse saturation current is more than silicon for germanium. You may refer to Electronic Devices and Circuits by Allen Mottershead Regards, Zain Ijaz UCTI, Malaysia Mechatronic Engineer.
Why germanium is not suitable for rectification?
Any semiconductor can be used for rectification, so germanium is suitable.However what you may be thinking of is power rectifiers. Germanium cannot operate with a junction temperature above about 60C, so this is a significant limitation on the power handling capability of germanium power rectifiers (even copper oxide or selenium power rectifiers can handle more power, so they were used for many years before quality silicon power rectifiers became available).
What are the Advantages and disadvantages of rectifiers?
There are different types of rectifiers including silicon controlled rectifiers. Advantages for this type of rectifier include that it can switch high voltages and is simple to control. Disadvantages include it cannot be turned off easily.
Why don't use germanium in silicon controlled rectifier?
the leakage current of silicon is less when compared with the leakage current of germanium.. hence scr's are made up of silicon than germanium.. hope tis one is useful to u all!- Vignesh.L(engineer, 1st year)
What has the author A E Jackets written?
A. E. Jackets has written: 'Sinusoidal inverter circuits using silicon controlled rectifiers'
Is germanium conducts electricity?
Germanium is a metal that conducts electricity and germanium crystals can be prepared in a manner allowing them to conduct electrify through their crystal lattice is one direction only, making germanium crystals valuable for use in transistors and rectifiers.
Where is germanium and silicon located in computer chips?
Germanium is not used in integrated circuits. Silicon is.
Can you give examples of elements that are metalloids?
The metalloids are Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, and Polonium.
What element is used in making transistors and chips?
Silicon and Germanium are the elements used in transistors
What has more shells or rings germanium or silicon?
germanium
Why don't we use germanium as a control device in silicon control rectifier?
Generally SCR is used at high power applications, in order to withstand the temperature dissipated in the SCR, THERMAL STABILITY is very high enough. It means that thermal stability of silicon is very high compared to germanium that's why germanium is not preferred. But that does not mean it is not possible, in fact before silicon became common in the 1960s devices equivalent to the SCR were built using germanium!
Is silicon a semiconductor?
Yes,silicon and germanium are semiconductors.
Why germanium is better than silicon?
products made by silicon are more stable than those made by germanium
