Interposer for curved detector
An interposer for a curved detector. In some embodiments a system includes a curved array photodetector; a first readout integrated circuit, the first readout integrated circuit being substantially flat; and an interposer, between the photodetector and the first readout integrated circuit. The photodetector and the first readout integrated circuit may each have a plurality of electrical contacts. The interposer may include a first conductor connecting a first contact, of the plurality of electrical contacts of the photodetector, and a second contact, of the plurality of electrical contacts of the first readout integrated circuit.
1. A system, comprising:
a curved array photodetector;
a first readout integrated circuit, the first readout integrated circuit being substantially flat; and
an interposer, between the photodetector and the first readout integrated circuit,
the photodetector having a plurality of electrical contacts,
the first readout integrated circuit having a plurality of electrical contacts, and
the interposer comprising a first conductor connecting a first contact, of the plurality of electrical contacts of the photodetector, and a second contact, of the plurality of electrical contacts of the first readout integrated circuit,
wherein:
the interposer has a first surface, and a second surface,
the first surface is substantially spherical;
the photodetector is substantially spherical, and conforms to the first surface; and
the second surface is substantially flat.
2. The system of claim 1 , further comprising a second conductor, the second conductor connecting a third contact, of the plurality of electrical contacts of the photodetector, and a fourth contact, of the plurality of electrical contacts of the first readout integrated circuit, the third contact being adjacent to the first contact, and the fourth contact being adjacent to the second contact,
wherein a separation between the second contact and the fourth contact is different, by at least 10%, from a separation between the first contact and the third contact.
3. The system of claim 2 , wherein the separation between the first contact and the third contact is at least 1 micron and at most 100 microns.
4. The system of claim 1 , wherein:
the first surface of the interposer has a first radius of curvature, and
the photodetector is substantially spherical, conforms to the first surface, and subtends an angle of at least 10 degrees.
5. The system of claim 1 , wherein the photodetector has a plurality of strain relief cuts.
6. The system of claim 1 , wherein a maximum chord length of the photodetector is greater than 5 mm and less than 50 mm.
7. The system of claim 1 , wherein the photodetector comprises at least 500,000 pixels.
8. The system of claim 1 , wherein the photodetector comprises an infrared photodetector based on a III-V semiconductor structure.
9. The system of claim 1 , further comprising a second readout integrated circuit having a plurality of electrical contacts, wherein the interposer further comprises a second conductor connecting a third contact, of the plurality of electrical contacts of the photodetector, and a fourth contact, of the plurality of electrical contacts of the second readout integrated circuit.