comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers (H01S5/36 takes precedence)

Introduced: January 2000

Title

Titles differ between systems:

IPC: comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers

CPC: comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers (H01S5/36 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Semiconductor lasers > Structure or shape of the active region; Materials used for the active region > comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers

CPC:

Semiconductor lasers (superluminescent diodes H10H20/00) > Structure or shape of the active region; Materials used for the active region > comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers (H01S5/36 takes precedence)

CPC subdivides this area 10x more granularly than IPC with 17 additional codes.

17 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 2000.

Child Classifications

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H01S 5/3401 +1 CPC CPC only CPC only
H01S 5/3403 +2 CPC CPC only CPC only
H01S 5/3407 CPC only CPC only
H01S 5/3408 CPC only CPC only
H01S 5/3409 CPC only CPC only
H01S 5/341 +1 CPC CPC only CPC only
H01S 5/3413 +1 CPC CPC only CPC only
H01S 5/3415 +1 CPC CPC only CPC only
H01S 5/3418 +1 CPC CPC only CPC only
H01S 5/342 CPC only CPC only
H01S 5/3421 CPC only CPC only
H01S 5/3422 CPC only CPC only
H01S 5/3424 CPC only CPC only
H01S 5/3425 CPC only CPC only
H01S 5/3426 CPC only CPC only
H01S 5/3427 CPC only CPC only
H01S 5/3428 CPC only CPC only
H01S 5/343 in AIIIBV compounds, e.g. AlGaAs-laser since 2000 +6 CPC IPC+CPC Available in IPC and CPC
H01S 5/347 in AIIBVI compounds, e.g. ZnCdSe- laser since 2000 IPC+CPC Available in IPC and CPC