Patent ID: 6979630

Claim:
A method of forming a semiconductor wafer comprising: a. depositing a first charged ion made from a light element selected from the group consisting of H, D, He, Li, B, Ne, and Si under the surface of a first substrate wherein the first substrate is covered with a protective layer thinner than the average penetration depth of the ions, and wherein a source of the first charged ion is kept at an electrical potential with respect to the first substrate between 20 kV and 500 kV, and wherein the first charged ion is deposited into the substrate at a dosage between 10 13 ions/cm 2 and 10 18 ions/cm 2 , and wherein the temperature of the first substrate is kept between −173° C. and 527° C.; b. implanting a second ion in the protective layer wherein the potential of a source of the second ion with respect to the substrate is lower than during the depositing step and wherein the temperature of the first substrate is kept between 27° C. and 527° C.; c. reducing the thickness of the protective layer; d. bonding the first substrate to a second substrate to form a composite structure; e. conducting a first annealing of the composite structure at a temperature between 127° C. and 327° C.; f. conducting a second annealing of the composite structure at a temperature between 427° C. and 527° C.; g. adding energy to the composite structure to separate the first and second substrates wherein the surface of the first substrate above the first charged ions remains attached to the second substrate after the separation of the first and second substrates to form a semiconductor wafer; and, h. finishing the surface of the semiconductor wafer.