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US 6,552,325 B1Granted
Photo diode array
AssigneeYokogawa Electric Corporation
InventorsMakoto Komiyama, Yoshihito Sanpei, Akira Miura, Katsutoshi Sakakibara, Tsuyoshi Yakihara, Tadashige Fujita, Shinji Kobayashi, Sadaharu Oka, Yasukazu Akasaka
Life of this patent
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Abstract
A photo diode array having improved linearity, wherein a plurality of photo diodes are arranged in an array with a plurality of electrodes connected to both ends of the light receiving surface of each photo diode to obtain current generated in each photo diode.
Claims13
A photo diode consisting of:
- an elongated photo sensitive surface having at least two contact portions located directly opposite each other;
- at least a first electrode connected to one of said at least two contact portions;
- at least a second electrode connected to a second of said at least two contact portions;
- and
- a conductive extension interconnecting said at least first and second electrodes so that light impinging at a point on said photo sensitive surface between said at least two contact portions causes electrons to flow from said point of impingement to one of said first and second electrodes located closest to said point of impingement whereby the distance traveled by said electron flow to the closest electrode is a maximum at one half the distance between said at least two contact portions.
2 more elements
A photo diode array comprising:
- a plurality of photo diodes arranged in an array, each of said photo diodes consisting of an elongated photo sensitive surface having at least two contact portions located directly opposite each other;
- a plurality of electrodes, each connected to a respective one of said two contact portions of each one of said plurality of photo diodes;
- a plurality of conductive extensions each interconnecting an electrode connected to one of said at least two contact portions of one photodiode and another connected to another of said at least two contact portions of that same photo diode, so that light impinging at a point on said photo sensitive surface causes electrons to flow from said point of impingement to an electrode located closest to said point of impingement whereby the distance traveled by said electron flow to the closest electrode is a maximum at one half the distance between said at least two contact portions.
Dependencies are inferred from the claim text.