Recessed Oxide By Localized Oxidation (437/69) Patents (Class 438/FOR229)

Foreign Patent Art Collections

Preliminary formation of guard ring (437/70) (Class 438/FOR230)
Preliminary anodizing (437/71) (Class 438/FOR231)
Preliminary etching of groove (437/72) (Class 438/FOR232)

There are no patents to show for this class.