Avalanche photodiode
First Claim
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1. An avalanche photodiode comprising:
- an absorption layer absorbing light to create carriers; and
a multiplication layer multiplying the created carriers, wherein the multiplication layer is formed of Si and the absorption layer is formed of a compound semiconductor, and wherein a semiconductor interface layer having a wider band-gap than that of the absorption layer is formed between the multiplication layer and the absorption layer.
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Abstract
An avalanche photodiode includes at least one crystal layer having a larger band-gap than that of an absorption layer formed by a composition or material different from that of the absorption layer formed on a junction interface between a compound semiconductor absorbing an optical signal and an Si multiplication layer, and the crystal layer may be intentionally doped with n or p type impurities to cancel electrical influences of the impurities containing oxides present on the junction interface of compound semiconductor and surface of Si.
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Citations
7 Claims
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1. An avalanche photodiode comprising:
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an absorption layer absorbing light to create carriers; and
a multiplication layer multiplying the created carriers, wherein the multiplication layer is formed of Si and the absorption layer is formed of a compound semiconductor, and wherein a semiconductor interface layer having a wider band-gap than that of the absorption layer is formed between the multiplication layer and the absorption layer. - View Dependent Claims (2, 3, 4, 5)
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6. An optical module mounting an avalanche photodiode, said avalanche photodiode comprises:
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an absorption layer absorbing light to create carriers; and
a multiplication layer multiplying the created carriers, wherein the multiplication layer is formed of Si and the absorption layer is formed of a compound semiconductor, and wherein a semiconductor interface layer having a wider band-gap than that of the absorption layer is formed between the multiplication layer and the absorption layer.
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7. An optical receiver mounting an avalanche photodiode, said avalanche photodiode comprises:
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an absorption layer absorbing light to create carriers; and
a multiplication layer multiplying the created carriers, wherein the multiplication layer is formed of Si and the absorption layer is formed of a compound semiconductor, and wherein a semiconductor interface layer having a wider band-gap than that of the absorption layer is formed between the multiplication layer and the absorption layer.
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Specification