Describing the ideas of the cmos process flow

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Question: During the 1970s, the dominant logic technology was NMOS as described briefly in Chapter L A cross sectional view of this technology is shown below (see also Figure). The depletion mode device is identical to the enhancement mode device except that a separate channel implant is done to create a negative threshold voltage. Design a plausible process flow to fabricate such a structure, following the ideas of the CMOS process flow in this chapter. You do not have to include any quantitative process parameters (times, temperatures, doses, etc.) Your answer should be given in terms of a series of sketches of the structure after each major process step, like the figures in this chapter. Briefly explain your reasoning for each step and the order you choose to do things.

Reference no: EM131788917

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