Double-poly Self-aligned BJT

Oct 14, 2014

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Double-poly Self-aligned BJT. B-C area small, small C. B-E area small, small C. Extrinsic base regions short and heavily doped, reducing R. Self-alignment allos reduction of area, and reduction of base area. Oxide (SiO 2 ) reduces base and emitter capacitance. Poly increases the β.

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Double-poly Self-aligned BJT

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Double-poly Self-aligned BJT • B-C area small, small C. • B-E area small, small C. • Extrinsic base regions short and heavily doped, reducing R. • Self-alignment allos reduction of area, and reduction of base area. • Oxide (SiO2) reduces base and emitter capacitance. • Poly increases the β.