US PATENT SUBCLASS 148 / 33.5
.~ Having at least three contiguous layers of semiconductive material

Current as of: June, 1999
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148 /   HD   METAL TREATMENT

33  DF  BARRIER LAYER STOCK MATERIAL, P-N TYPE {5}
33.5.~ Having at least three contiguous layers of semiconductive material {1}
33.6  DF  .~.~> Including an alloy layer having named impurities

DEFINITION

Classification: 148/33.5

(under subclass 33) Stock comprising three or more contiguous layers of semiconductive material.