Isolation of photogenerated carriers within an originating colle

Details Isolation of photogenerated carriers within an originating colle Isolation of photogenerated carriers within an originating colle

1992-04-30

1996-01-02

Fourson, George

Fishing, trapping, and vermin destroying

437 5, 437159, 437 61, 437987, H01L 2176

Patent

active

054808111

ABSTRACT:
A photosensing array and a method of making the same wherein the array includes a semiconductor substrate having collecting regions and recrystallized regions. Each collecting region is operatively associated with a photosensing element. Adjacent collecting regions are separated by a recrystallized region. The recrystallized regions are formed by thermally migrating doping metal into the semiconductor substrate using thermal zone gradient melting. With respect to the collecting regions, the recrystallized regions have a relative conductivity level or a conductivity type such that the recrystallized regions have the property of impeding photogenerated carrier migration from one collecting region to an adjacent collecting region. Preferably, the doping metal is one having a high absorption coefficient to block passage of photons between adjacent collecting regions.

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