Solid-state curved focal plane arrays
The present invention relates to curved focal plane arrays. More specifically, the present invention relates to a system and method for making solid-state curved focal plane arrays from standard and high-purity devices that may be matched to a given optical system. There are two ways to make a curved focal plane arrays starting with the fully fabricated device. One way, is to thin the device and conform it to a curvature. A second way, is to back-illuminate a thick device without making a thinned membrane. The thick device is a special class of devices; for example devices fabricated with high purity silicon. One surface of the device (the non VLSI fabricated surface, also referred to as the back surface) can be polished to form a curved surface.
1. A method for manufacturing a detector array comprising acts of: removing a portion of bulk material from a solid-state focal plane detector array to form a deformable membrane having a detector circuitry side and a second side; passivating the second side of the deformable membrane; and conforming the deformable membrane, such that a portion of the deformable membrane has a finite radius of curvature, wherein the act of passivating comprises an act of delta-doping the second side of the deformable membrane;
wherein the act of conforming includes acts of: coating a curved substrate with a bonding material; and pushing the deformable membrane onto the curved substrate; and
further including an act of forming the curved substrate from polished fritted disks.