substrate
Quick Summary
An electronic substrate is a base layer, often made of insulating materials like alumina, on which microscopic electronic components and their connections are built. These substrates are crucial for the reliability of integrated circuits, which are assemblies of millions of interconnected components like transistors and resistors.
Substrates can be either thick or thin films. The materials used must possess good electrical insulating qualities, mechanical strength, and thermal stability. While alumina is a dominant material due to its resistivity and strength, its dielectric constant and thermal conductivity can be limiting factors, leading to ongoing development of materials with improved properties.12
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semiconductor deviceBipolar transistors…n-type region in the p-type substrate; subsequently a p+ region (very heavily doped p-type) is formed in the n region. Ohmic contacts are made to the top p+ and n regions through the windows opened in the oxide layer (an insulator) and to the p region at the bottom.
Read More…n-type region in the p-type substrate; subsequently a p+ region (very heavily doped p-type) is formed in the n region. Ohmic contacts are made to the top p+ and n regions through the windows opened in the oxide layer (an insulator) and to the p region at the bottom.
Read More- semiconductor deviceMetal-semiconductor field-effect transistors
…by a high-resistivity semi-insulating (nonconducting) substrate. When a positive voltage is applied to the drain with respect to the source, electrons flow from the source to the drain. Hence, the source serves as the origin of the carriers, and the drain serves as the sink. The third electrode, the gate,…
Read More…by a high-resistivity semi-insulating (nonconducting) substrate. When a positive voltage is applied to the drain with respect to the source, electrons flow from the source to the drain. Hence, the source serves as the origin of the carriers, and the drain serves as the sink. The third electrode, the gate,…
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