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Chapter 12: Problem 17

What advantages does silicon have over other semiconductors for use in integrated circuits?

Short Answer

Expert verified
Silicon has several advantages over other semiconductors for use in integrated circuits, such as its abundance and affordability, high thermal conductivity, wide bandgap energy of approximately 1.12 eV, ability to form a stable oxide layer (silicon dioxide), and compatibility with complementary metal-oxide-semiconductor (CMOS) technology. These properties make it a more suitable choice for applications such as mobile devices and computers and contribute to its widespread use in the electronics industry.

Step by step solution

01

Introduction to Silicon Semiconductors

Silicon is a widely used semiconductor material in the electronics industry, especially for integrated circuits (ICs). It has several advantages over other semiconductors, which will be discussed in the following steps.
02

Abundance and Affordability

Silicon is the second most abundant element on Earth's crust, making it easier to obtain and more cost-effective compared to other semiconducting materials. This abundance and affordability contribute to the widespread use of silicon in integrated circuits.
03

Thermal Properties

Silicon has a high thermal conductivity, which allows it to dissipate heat more effectively than other semiconducting materials. This is a critical factor in minimizing the risk of thermal damage in integrated circuits, as heat generation is a common issue in electronic devices.
04

Wide Bandgap Energy

Silicon has a relatively wide bandgap energy of approximately 1.12 eV at room temperature. This allows silicon to withstand higher levels of voltage and temperature compared to other semiconductors with smaller bandgap energies. As a result, silicon-based ICs can operate more reliably in various conditions.
05

Oxidation Properties

An essential property of silicon is its ability to form a stable, high-quality oxide layer (silicon dioxide) through a simple oxidation process. Silicon dioxide works as an excellent insulator and protects the underlying silicon from contamination, making it possible to create smaller and more complex ICs.
06

Compatibility with CMOS Technology

Silicon is highly compatible with complementary metal-oxide-semiconductor (CMOS) technology, which is a widely used manufacturing process for integrated circuits. CMOS technology enables the fabrication of low-power, high-density ICs, making silicon a suitable choice for applications such as mobile devices and computers. In conclusion, silicon has several advantages over other semiconductors, including its abundance and affordability, superior thermal properties, wide bandgap energy, reliable oxidation properties, and compatibility with CMOS technology. These factors contribute to silicon's widespread use in integrated circuits.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Integrated Circuits
Integrated circuits (ICs) are essential components in modern electronic devices. They serve as the building blocks for electronic circuits, integrating millions of small electronic parts, like transistors and resistors, onto a single piece of semiconductor material.
Silicon is the dominant material used for ICs due to several benefits:
  • **Cost-Effectiveness**: Thanks to its abundance, silicon is relatively cheap. This makes it possible to mass-produce silicon-based ICs at a lower cost compared to other semiconducting materials.
  • **Scalability**: Silicon-enabled ICs can be scaled down in size. This miniaturization is crucial for creating compact electronic devices, from smartphones to laptops.
  • **High Performance**: The ability of silicon to handle higher voltages and temperatures translates to better performance and reliability of ICs.
These characteristics make silicon the preferred semiconductor material, ensuring the reliable function and affordability of a wide range of electronic applications.
Thermal Properties of Silicon
The thermal properties of silicon significantly contribute to its effectiveness in electronic applications. One of its standout features is its high thermal conductivity, which is the ability to conduct heat efficiently.
What makes silicon superior in this regard?
  • **Optimal Heat Dissipation**: Silicon's high thermal conductivity helps in dissipating heat effectively. This ensures that the ICs remain cool during operation, reducing the risk of overheating.
  • **Temperature Resilience**: Silicon remains stable over a broad range of temperatures, which is essential in handling the heat generated by dense circuit operations.
By maintaining a lower operating temperature, silicon-based semiconductors prevent thermal damage, thus extending the lifespan of electronic devices. This thermal stability also means that silicon can be used in high-performance applications where heat generation is a concern.
CMOS Technology
Complementary metal-oxide-semiconductor (CMOS) technology is a pivotal process used in creating integrated circuits. It combines p-type and n-type semiconductors to produce circuits with minimal power consumption, which is one reason why silicon is an ideal substrate for this technology.
Here鈥檚 why silicon and CMOS work so well together:
  • **Energy Efficiency**: CMOS technology enables ICs to consume less power. This makes silicon-CMOS circuits energy-efficient, which is a significant advantage for battery-powered devices.
  • **High Density**: Silicon allows for high-density transistor integration, crucial for developing complex circuits in a reduced space. This is vital for modern electronics with strict space and power requirements.
  • **Versatility**: Silicon鈥檚 compatibility with CMOS has ensured its presence in various sectors like computing, communication, and consumer electronics, enabling widespread, efficient electronic capabilities.
The synergy between silicon and CMOS technology has revolutionized the electronics industry, driving the development of faster, smaller, and more energy-efficient devices.

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Most popular questions from this chapter

One major difference in the behavior of semiconductors and metals is that semiconductors increase their conductivity as you heat them (up to a point), but the conductivity of a metal decreases as you heat it. Suggest an explanation.

Silicon has diamond structure (Figure 12.3) with unit cell edge length of \(5.43 \AA\) and eight atoms per unit cell. (a) How many silicon atoms are there in \(1 \mathrm{~cm}^{3}\) of material? (b) Suppose you dope that \(1-\mathrm{cm}^{3}\) sample of silicon with 1 ppm of phosphorus that will increase the conductivity by a factor of a million. How many milligrams of phosphorus are required?

Describe how a cholesteric liquid crystal phase differs from a nematic phase.

Write a chemical equation for formation of a polymer via a condensation reaction from the monomers succinic acid \(\left(\mathrm{HOOCCH}_{2} \mathrm{CH}_{2} \mathrm{COOH}\right)\) and ethylenediamine \(\left(\mathrm{H}_{2} \mathrm{NCH}_{2} \mathrm{CH}_{2} \mathrm{NH}_{2}\right)\).

Draw the structure of the monomer(s) employed to form each of the following polymers shown in Table \(12.5\) (a) polyvinyl chloride, (b) nylon 6,6, (c) polyethylene terephthalate.
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