Patent ID: 11894416
Assignee: GOOGLE LLC
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A display device comprising:
a substrate including a first emitter and a second emitter thereon,
the first emitter including a first lower active quantum well (QW) region that has a first emission spectrum spanning a first spectral range,
the second emitter including (i) an upper active QW region that has a second emission spectrum spanning a second spectral range that is distinct from the first spectral range, (ii) a second lower active QW region having the first emission spectrum and being located between the upper active QW region and the substrate, and (iii) a barrier layer between the second lower active QW region and the upper active QW region for suppressing emission of the second lower active QW region,
the first emitter having a first height with respect to a top surface of the substrate,
the substrate defining a recess that extends into the substrate, the second emitter being partially contained within the recess and partially outside the recess, such that a second height of the second emitter with respect to the top surface equals the first height, and
an overall height of the second emitter is greater than an overall height of the first emitter.