What is the oxidation time in seconds

Reference no: EM131321045

1. Why is 1=C(dV/dt) inconsistent with 1=dQ/dt If Q=CV Is used? Is C=dQ/dV consistent with 1=C(dV/dt) and 1=dQ/dt? Explain concisely, succinctly.

2. The n-channel Si MOS transistor switch In the DRAM (dynamic random access) cell of the next generation 16 Mbit chip (1 bit = 1 cell which contains 1 transistor and 1 capacitor) requires an oxide of 100A or 10nm (IA =10^-8cm = 0.1nm and 1nm 10^-9m = 10^-7cm = 10A).

The cell sizes or lithographic line width are about 0.7μm 7000A = 700nm in order to pack 16 million cells on one 0.5cmx0.5cm chip. This small line width requires low temperature processing so that the high temperature oxidation and diffusion times are not so short to be controllable. Suppose that the 100A thick oxide is to be grown at 900C in dry oxygen on a p-type SI.

(a) What is the oxidation time in seconds.

(b) What is the capacitance of the oxide layer per unit area, C°, in pF/cm²?

Reference no: EM131321045

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