Patent ID: 11908723
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 20:
21. A handler wafer, comprising:
a handler layer formed from a material that is transparent at a wavelength of light;
a bonding layer that includes:
a debonding layer that absorbs the wavelength of light, being formed from a material that has a real index of refraction greater than 3.0 and an extinction coefficient greater than 5.0 at the wavelength;
an optical enhancement layer being formed from a material that is transparent at the wavelength and that has an index of refraction greater than 2.0, to confine an energy at the wavelength of light to the debonding layer; and
an optical boundary layer being formed from a material that has a real index of refraction less than 2.0, positioned on an opposite side of the debonding layer from the handler layer that reflects the energy at the wavelength of light back to the debonding layer.