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

Claim 10:
11. A method of manufacturing semiconductor device for infrared detection, comprising:
providing a first semiconductor layer with a first type of conductivity and a second semiconductor layer with a second type of conductivity,
providing an optical coupling layer with an optical coupler and a first lateral absorber region,
stacking the first semiconductor layer, second semiconductor layer and optical coupling layer to form the semiconductor device; wherein:
the optical coupler is configured to deflect incident light towards the first lateral absorber region, and
the first lateral absorber region is made of an absorber material with a bandgap Eg in the infrared, IR, 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%.