Preservation of surface features on semiconductor surfaces

Patent · Tue Feb 14 04:00:00 EST 1989

OSTI ID:6235146

Wilt, D P

A semiconductor laser is described comprising a Group III-V compound semiconductor body having a major surface, p1 an optical grating on the major surface, a protective coating on the grating, the coating including a transition metal, a Group III-V compound semiconductor heterostructure formed on the coating, the heterostructure having the shape of a mesa and including a Group III-V compound semiconductor active layer, a current-blocking Group III-V compound semiconductor structure laterally adjacent the mesa and effective to direct the primary flow of current through the mesa during operation of the laser, and means forming electrical contact to the laser.

• Assignee: American Telephone and Telegraph Co., AT and T Bell Laboratories, Murray Hill, NJ
• Patent Number(s): US 4805178
• OSTI ID: 6235146
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
COATINGS
DESIGN
ELECTRIC CONTACTS
ELECTRICAL EQUIPMENT
EQUIPMENT
LASER MATERIALS
LASERS
MATERIALS
OPTICAL SYSTEMS
PROTECTIVE COATINGS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR LASERS
SEMICONDUCTOR MATERIALS
SURFACES
TRANSITION ELEMENT COMPOUNDS