论文信息 - Ultraviolet avalanche photodiode in CMOS technology

Ultraviolet avalanche photodiode in CMOS technology

We present a simple method that allows the fabrication of ultraviolet-selective avalanche photodiodes in a standard CMOS technology. An efficient guard ring structure is created using the lateral diffusion of two n/sub well/ regions separated by a gap of 0.6 /spl mu/m. Our photodiodes achieve a very low dark current of only 400 pA/mm/sup 2/, an excess noise F=7 for a mean gain =20 at /spl lambda/=400 nm, and a good gain uniformity.

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