Patent ID: 11916169
Assignee: PLESSEY SEMICONDUCTORS LIMITED
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A method of forming an active matrix LED array precursor comprising:
(i) providing a substrate having a surface;
(ii) forming a continuous first semiconductor layer on the surface of the substrate, the first semiconducting layer comprising substantially undoped Group III-nitride,
(iii) forming a barrier layer on the first semiconductor layer, the barrier layer configured to induce a two-dimensional electron channel layer at the interface between the first semiconductor layer and the barrier layer;
(iv) selectively masking the barrier layer by depositing a masking layer comprising a plurality of LED-defining apertures;
(v) selectively removing unmasked portions of the barrier layer and the first semiconductor layer to expose a portion of the first semiconductor layer through each of the LED-defining apertures;
(vi) forming a monolithic LED structure comprising a plurality of Group III-nitride semiconducting layers on unmasked portions of the first semiconductor layer through the LED-defining apertures such that each monolithic LED structure is encircled by the two-dimensional electron channel layer,
(vii) forming a plurality of gate contacts, the gate contacts formed over portions of the two-dimensional electron channel layer, each gate contact encircling a monolithic LED structure; and
(viii) forming a common source contact, the common source contact configured to provide an ohmic contact to each portion of the two-dimensional electron channel layer such that a plurality of transistor-driven LED precursors are formed comprising high electron mobility transistors between the common source contact and each monolithic LED structure.