Patent ID: 8715517
Filing Date: 2014-05-06
Classification: B32B,H03H

Abstract:
1. A process for fabricating an acoustic wave resonator comprising a suspended membrane comprising a piezoelectric material layer, the process comprising: preparing a first stack comprising at least one layer of first piezoelectric material on a surface of a first substrate; preparing a second stack comprising at least one second substrate; depositing or creating particles of controlled sizes on a surface of one of said stacks; forming a projecting nanostructure on the surface of the one of said stacks before performing subsequent boding, where the projecting nanostructure comprises a non-bonding initiating zone comprising at least one particle of the particles of controlled sizes; forming a blister around the non-bonding initiating zone between said stacks during or after direct bonding said stacks; and thinning the first stack to eliminate at least the first substrate.