Monolithic series/parallel led arrays formed on highly resistive substrates
US6547249B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2001 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | Mar 29, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8516
Abstract
Series or parallel LED arrays are formed on a highly resistive substrate, such that both the p- and n-contacts for the array are on the same side of the array. The individual LEDs are electrically isolated from each other by trenches or by ion implantation. Interconnects deposited on the array connects the contacts of the individual LEDs in the array. In some embodiments, the LEDs are III-nitride devices formed on sapphire substrates. In one embodiment, two LEDs formed on a single substrate are connected in antiparallel to form a monolithic electrostatic discharge protection circuit. In one embodiment, multiple LEDs formed on a single substrate are connected in series . In one embodiment, multiple LEDs formed on a single substrate are connected in parallel. In some embodiments, a layer of phosphor covers a portion of the substrate on which one or more individual LEDs is formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.