H - Electricity – 01 – L
Patent
H - Electricity
01
L
345/24
H01L 31/10 (2006.01) H01L 31/0224 (2006.01) H01L 31/107 (2006.01)
Patent
CA 1182199
IMPROVED AVALANCHE PHOTODIODE AND METHOD OF MAKING SAME Abstract of the Disclosure The invention is an improved avalanche photodiode having higher sensitivity at short wavelengths and a method of making it. The improvement comprises a contacting layer of varying thickness which can have a thin portion through which light. enters the avalanche photodiode and a thicker portion surrounding the thin portion to which electrical contact can be made. This structure exhibits substantially greater sensitivity at wavelengths less than 500 nanometers without affecting the long wavelength sensitivity. The invention is also a method of forming the avalanche photodiode where the thicker portion and the thinner portions are sequentially formed using a two-step diffusion process.
387651
Morneau Roland L.
Rca Corporation
LandOfFree
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