Patent ID: 6071795
Filing Date: 2000-06-06
Classification: H01L

Abstract:
A method of separating a thin film from a growth substrate, comprising the steps of:growing a film of a first composition on a first side of a crystallographically oriented first substrate of a second composition, wherein said film comprises a III-V nitride compound and said first substrate comprises sapphire;bonding said film on a side thereof opposite said first substrate to a second substrate;irradiating said first substrate from an irradiation side thereof with light of a wavelength that is substantially more strongly absorbed in said film than in the one of said first and second substrates on said irradiation side of said film, wherein said irradiating step forms an interfacial layer between said film and said first substrate; andafter completion of said irradiating step, detaching said second substrate with portions of said film attached thereto from said first substrate, wherein said detaching step severs said interfacial layer.