comprising PN junctions, e.g. hetero- or double- heterostructures (H01S5/34, H01S5/36 take precedence)

Introduced: January 2000

Title

Titles differ between systems:

IPC: comprising PN junctions, e.g. hetero- or double- hetero-structures

CPC: comprising PN junctions, e.g. hetero- or double- heterostructures (H01S5/34, H01S5/36 take 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 PN junctions, e.g. hetero- or double- hetero-structures

CPC:

Semiconductor lasers (superluminescent diodes H10H20/00) > Structure or shape of the active region; Materials used for the active region > comprising PN junctions, e.g. hetero- or double- heterostructures (H01S5/34, H01S5/36 take precedence)

CPC subdivides this area 6x more granularly than IPC with 9 additional codes.

9 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 5/3201 CPC only CPC only
H01S 5/3202 +4 CPC CPC only CPC only
H01S 5/3205 CPC only CPC only
H01S 5/3206 +2 CPC CPC only CPC only
H01S 5/321 CPC only CPC only
H01S 5/3211 +6 CPC CPC only CPC only
H01S 5/322 CPC only CPC only
H01S 5/3222 CPC only CPC only
H01S 5/3223 +2 CPC CPC only CPC only
H01S 5/323 in AIIIBV compounds, e.g. AlGaAs-laser, since 2000 +2 CPC IPC+CPC Available in IPC and CPC
H01S 5/327 in AIIBVI compounds, e.g. ZnCdSe-laser since 2000 IPC+CPC Available in IPC and CPC