Patent ID: 11923467
Assignee: AMS AG
Field: Optics (Instruments)
Classification: CPC H  G | IPC H

Claim 0:
1. A semiconductor device for infrared detection, comprising a stack of a first semiconductor layer, a second semiconductor layer and an optical coupling layer, wherein:
the first semiconductor layer has a first type of conductivity and the second semiconductor layer has a second type of conductivity,
the optical coupling layer comprises an optical coupler and at least a first lateral absorber region,
the optical coupler is configured to deflect incident light towards the first lateral absorber region, and
the first lateral absorber region comprises an absorber material with a bandgap Eg in the infrared, IR and wherein the first lateral absorber region has a thickness of about 150 nm, wherein
the absorber material has a bandgap Eg smaller in value than the bandgap for silicon of Eg=1.1 eV and ranges up at most to 1250 nm,
the absorber material comprises a strained silicon germanium, Si—Ge, alloy, and the bandgap Eg is defined by a relative amount of silicon of at least 70% and a relative amount of germanium of at most 30%.