US PATENT SUBCLASS 257 / 13
.~.~ Incoherent light emitter

Current as of: June, 1999
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257 /   HD   ACTIVE SOLID-STATE DEVICES (E.G., TRANSISTORS, SOLID-STATE DIODES)

9  DF  THIN ACTIVE PHYSICAL LAYER WHICH IS (1) AN ACTIVE POTENTIAL WELL LAYER THIN ENOUGH TO ESTABLISH DISCRETE QUANTUM ENERGY LEVELS OR (2) AN ACTIVE BARRIER LAYER THIN ENOUGH TO PERMIT QUANTUM MECHANICAL TUNNELING OR (3) AN ACTIVE LAYER THIN ENOUGH TO PERMIT CARRIER TRANSMISSION WITH SUBSTANTIALLY NO SCATTERING (E.G., SUPERLATTICE, QUANTUM WELL, OR BALLISTIC TRANSPORT DEVICE) {5}
12  DF  .~ Heterojunction {3}
13.~.~ Incoherent light emitter

DEFINITION

Classification: 257/13

Incoherent light emitter:

(under subclass 12) Subject matter wherein the device emits incoherent light.

(1) Note. Coherent light generators are explicitly excluded from this subclass. This means that cross-references from Class 372, Coherent Light Generators, are not to be placed in this subclass. It is not desired to create a duplicate set of heterostructure lasers in this subclass.

SEE OR SEARCH CLASS

372, Coherent Light Generators,

43, 50 for coherent semiconductor light generators.