Silicon is implanted with P ions at 200 keV to a dose of 2.1 ×10^14 cm^-2. Calculate and plot t

step 1 In this question we have to find EFI minus EFP and EFN minus EFI for different excess carrier co

Silicon is implanted with P ions at 200 keV to a dose of 2.1...

Silicon is implanted with $\mathrm{P}$ ions at $200 \mathrm{keV}$ to a dose of $2.1 \times 10^{14} \mathrm{~cm}^{-2}$. Calculate and plot the $\mathrm{P}$ distribution on a semilog plot as in Fig. $5-4 .$

Key Concepts

Projected Range and Range Straggling

The projected range is the mean depth that implanted ions reach in the substrate, while range straggling represents the statistical spread or variance around this mean depth. Together, these parameters describe the depth distribution profile of the implanted dopants, often approximated by a Gaussian function, which is essential for predicting device behavior.

Implantation Energy

Implantation energy, usually measured in kiloelectronvolts (keV), is the energy with which ions are accelerated and implanted into the substrate. It determines the depth of penetration of the ions and influences the resultant dopant profile by affecting the projected range and the spread (straggle) of the implanted ions.

Semilogarithmic Plot

A semilogarithmic plot is a graph where one axis (usually the y-axis) is on a logarithmic scale, and the other axis (typically the x-axis) is on a linear scale. This type of plot is especially useful for visualizing dopant distributions that span several orders of magnitude, allowing for a clearer view of both the high concentration regions near the projected range and the exponential decay in the tails.

Ion Implantation

Ion implantation is a semiconductor fabrication process in which ions of a dopant element are accelerated in an electric field and directed into the substrate material. This technique allows for precise control over the dopant concentration and depth distribution, which is critical for modifying the electrical properties of the semiconductor device.

Dose

Dose refers to the total number of ions delivered per unit area during an implantation process. It is typically expressed in ions per square centimeter and directly influences the concentration of dopants introduced into the material, which in turn affects the electrical characteristics of the semiconductor.

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