Solid state lighting devices with selected thermal expansion and/or surface characteristics, and associated methods

US9806230B2 · kind B2 · utility

Assignee

• Qromis, Inc. · US

Inventor

• Ji-Soo Park · Daejeon, KR

Key dates

• Filing date: Oct 19, 2015
• Grant date: Oct 31, 2017
• Expiry date: Oct 19, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/825

Abstract

Solid state lighting devices with selected thermal expansion and/or surface characteristics, and associated methods are disclosed. A method in accordance with a particular embodiment includes forming an SSL (solid state lighting) formation structure having a formation structure coefficient of thermal expansion (CTE), selecting a first material of an interlayer structure to have a first material CTE greater than the substrate CTE, and selecting a second material of the interlayer structure based at least in part on the second material having a second material CTE less than the first material CTE. The method can further include forming the interlayer structure over the SSL formation structure by disposing (at least) a first layer of the first material over the SSL formation structure, a portion of the second material over the first material, and a second layer of the first material over the second material. The SSL formation structure supports an SSL emitter material, and the method further includes counteracting a force placed on the formation structure by the first material, by virtue of the difference between the second material CTE and the first material CTE. In other embodiments…