SEGMENTED CHANNEL STOP GRID FOR CROSSTALK MITIGATION IN VISIBLE IMAGING ARRAYS
First Claim
Patent Images
1. An imaging system including a focal plane array comprising:
- a first row of photodetectors;
a second row of photodetectors adjacent to the first row of photodetectors; and
a segmented isolation grid disposed between photodetectors in the first row of photodetectors and photodetectors in the second row of photodetectors.
1 Assignment
0 Petitions
Accused Products
Abstract
An imaging system includes a focal plane array comprising a first row of photodetectors, a second row of photodetectors adjacent to the first row of photodetectors, and a segmented isolation grid including portions disposed between photodetectors in the first row of photodetectors and photodetectors in the second row of photodetectors.
-
Citations
13 Claims
-
1. An imaging system including a focal plane array comprising:
-
a first row of photodetectors; a second row of photodetectors adjacent to the first row of photodetectors; and a segmented isolation grid disposed between photodetectors in the first row of photodetectors and photodetectors in the second row of photodetectors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method of operating a focal plane array, the method comprising:
-
applying a reverse bias to photodetectors in a first row of photodetectors of the focal plane array; integrating photocurrent produced in the photodetectors in the first row of photodetectors; and applying a reverse bias to photodetectors in a second row of photodetectors of the focal plane array while continuing to integrate the photocurrent produced in the photodetectors in the first row of photodetectors, application of the reverse bias to the photodetectors in the second row of photodetectors inducing a voltage potential in portions of a segmented isolation grid associated with the second row of photodetectors, the voltage potential being prevented from propagating to portions of the segmented isolation grid associated with the first row of photodetectors by breaks in the segmented isolation grid between the portions of the segmented isolation grid associated with the first row of photodetectors and the portions of the segmented isolation grid associated with the second row of photodetectors. - View Dependent Claims (12)
-
-
13. An imaging system including a focal plane array comprising:
-
an array of photodetectors including P-I-N photodiodes arranged in a plurality of rows and a plurality of columns; and an electrically floating segmented isolation grid comprising a wall of doped semiconductor having a doping level less than that of P-type regions of the P-I-N photodiodes and N-type regions of the P-I-N photodiodes, the segmented isolation grid including individual grid elements surrounding each individual P-I-N photodiode in the array of photodetectors, a region of intrinsic semiconductor disposed between each individual P-I-N photodiode and a corresponding segmented isolation grid element, each individual grid element including a plurality of electrically isolated regions that prevent flow of current between grid elements surrounding P-I-N photodiodes in adjacent rows.
-
Specification