Patent ID: 11887885
Assignee: GLOBALWAFERS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 0:
1. A method of preparing a multilayer structure, the method comprising:
forming a trap rich layer on a front surface of a single crystal semiconductor handle substrate comprising two major, generally parallel surfaces, one of which is the front surface of the single crystal semiconductor handle substrate and the other of which is a back surface of the single crystal semiconductor handle substrate, a circumferential edge joining the front and back surfaces of the single crystal semiconductor handle substrate, and a central plane of the single crystal semiconductor handle substrate between the front and back surfaces of the single crystal semiconductor handle substrate, wherein the single crystal semiconductor handle substrate has a bulk resistivity of at least about 5000 ohm-cm, an interstitial oxygen concentration of less than about 1×1016 atoms/cm3, and a nitrogen concentration of at least about 1×1013 atoms/cm3;
bonding a front surface of a single crystal semiconductor donor substrate to the trap rich layer to thereby form a bonded structure, wherein the single crystal semiconductor donor substrate comprises two major, generally parallel surfaces, one of which is the front surface of the semiconductor donor substrate and the other of which is a back surface of the semiconductor donor substrate, a circumferential edge joining the front and back surfaces of the semiconductor donor substrate, and a central plane between the front and back surfaces of the semiconductor donor substrate, wherein the single crystal semiconductor donor substrate comprises a donor cleave plane; and
cleaving the bonded structure at the donor cleave plane of the single crystal semiconductor donor substrate to thereby prepare a cleaved structure comprising the single crystal semiconductor handle substrate, the trap rich layer, and a single crystal semiconductor device layer.