Patent ID: 9230849
Filing Date: 2016-01-05
CPC Classification: H01L

Claim Text:
1. A method for preparing an ultra-thin material on insulator through adsorption by a doped ultra-thin layer, comprising the following steps: a) providing a first substrate, and successively and epitaxially growing a doped single crystal film and a top film on the first substrate, a step of epitaxially growing a buffer layer on the doped single crystal film is further comprised; b) performing ion implantation, and making the ion implanted into a preset depth under an interface between the doped single crystal film and a silicon substrate, a step of removing a residual buffer and doped single crystal film is further comprised; c) providing a second substrate having an insulating layer, bonding the insulating layer and the top film, and then performing a first annealing stage on a sample to make the doped single crystal film adsorb the ion and form a micro crack, so as to implement ion-cut; and d) performing chemical corrosion or chemical-mechanical polishing, and removing the residual doped single crystal film, so as to obtain an ultra-thin material on insulator.