Patent ID: 8580593

Claim:
A method for manufacturing a solid state lighting (SSL) device, comprising: attaching a formation structure to a composite structure, the composite structure having a composite coefficient of thermal expansion (CTE) dependency over a temperature range, the composite structure containing a base material and a CTE control material contained within the base material, the base material including a single crystalline material or a polycrystalline material; and reducing a thickness of the formation structure attached to the composite structure; forming an SSL structure on the formation structure with the reduced thickness, the SSL structure having an SSL CTE temperature dependency over the temperature range, wherein a difference between the composite and SSL CTE temperature dependencies is below a target threshold over at least a portion of the temperature range, and wherein the base material of the composite structure contains polycrystalline aluminum nitride (AlN) and the CTE control material of the composite structure contains yttrium oxide (Y 2 O 3 ), and a volume ratio of the base material to the CTE control material is between about 0.75 to about 0.95.