Patent ID: 9275892
Filing Date: 2016-03-01
CPC Classification: H01L

Claim Text:
1. A method of transferring a layer from a donor substrate onto a receiving substrate, comprising: implanting at least one species into a first layer region of the donor substrate and forming precursors of platelets and/or microcavities in the first layer region, the first layer region of the donor substrate extending horizontally within the donor substrate and extending vertically from a first depth within the donor substrate through a first thickness of the donor substrate; after implanting the at least one species into the first layer region of the donor substrate, implanting silicon ions into a second layer region of the donor substrate, the second layer region of the donor substrate extending horizontally within the donor substrate and extending vertically from a second depth within the donor substrate through a second thickness of the donor substrate, the first layer region of the donor substrate at least partially overlapping the second layer region of the donor substrate in the vertical direction such that at least a portion of the second layer region of the donor substrate is coextensive with and encompasses at least a portion of the first layer region of the donor substrate, the implantation of the silicon ions neutralizing and/or destroying at least some of the precursors of platelets and/or microcavities in the first layer region so as to increase a cleavage temperature required to cause cleavage of the donor substrate along a plane of weakness to be formed therein; after implanting silicon ions into the second layer region of the donor substrate, bonding a face of the donor substrate with a face of the receiving substrate by wafer bonding; and heating the donor substrate, forming at least one of microcavities and platelets from the precursors and forming the plane of weakness in the first layer region of the donor substrate, and splitting the donor substrate by cleavage, at the cleavage temperature, along the plane of weakness.