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

Claim 23:
24. A handler wafer, comprising:
a handler layer formed from silicon;
a bonding layer that includes:
a debonding layer that absorbs a wavelength of light from a debonding laser, selected from a range between 1200 nm and 2500 nm, being formed from a metallic material that is selected from the group consisting of magnesium, iron, nickel, rhodium, palladium, platinum, and lutetium;
an optical enhancement layer being formed from a material selected from the group consisting of amorphous silicon, amorphous germanium, and polycrystalline silicon, to confine a laser energy at the wavelength of light to the debonding layer;
an optical boundary layer on an opposite side of the debonding layer from the handler layer, to reflect the laser energy at the wavelength of light into the debonding layer and to provide adhesive attachment to a wafer; and
an antireflective layer between the optical enhancement layer and the handler layer.