Contents
Why does Icbo vary with temperature?
This junction being polarized in opposite direction, the current ICBO is due to the minority carriers constituted by the electron-hole pairs. The number of these couples increases when the temperature increases. As a result, the ICBO current also increases.
At what temperature is silicon permanently damaged?
Silicone rubber, unlike the majority of other rubbers, can withstand extreme temperatures way above 200°C and down to as low as -60°C without deforming.
At what temperature does silicon become permanently damaged?
The correct answer is 150°C.
What happens when a transistor is outside the max temperature range?
Over that temperature, all bets are off and ionic migration and other temperature-related effects can actually damage the device in a relatively short time, i.e. the part could have its prospective operating life shortened.
What happens to the intrinsic conductance of a transistor?
Intrinsic conductance is a feature present at all temperatures below 0K, however at room temperature the effects of dopand prevail. With rising temperatures the intrinsic conductance grows prominent over the desired function of the transistor until it is rendered unusable.
What’s the operating temperature of a semiconductor part?
Semiconductor parts are most often specified for use in the “commercial” 0 to 70°C and, to a lesser extent, in the “industrial” -40 to 85°C operating temperature range. These operating temperature ratings generally satisfy the demands of the dominant semiconductor customers in the computer, telecommunications, and consumer electronic industries.
What are the rules of thumb for transistor action?
Some useful “rules of thumb” which help in understanding transistor action are (from Horowitz & Hill): A base emitter voltage VBEof about 0.6 v will “turn on” the base-emitter diode and that voltage changes very little, +/- 0.1v throughout the active range of the transistor which may change base current by a factor of 10 or more.