Patent ID: 11869810
Assignee: SILTECTRA GMBH
Field: Machine tools (Mechanical engineering)
Classification: CPC H  B  C | IPC B  C  H

Claim 17:
18. A method of separating a solid-state layer from a solid-state body, comprising:
generating a plurality of modifications by laser beams within the solid-state body to form a detachment region;
after generating the plurality of modifications, generating a composite structure by arranging or generating layers and/or components on or above an initially exposed surface of the solid-state body, wherein the exposed surface is part of the solid-state layer to be separated; and
introducing an external force into the solid-state body to generate stresses in the solid-state body or generating an internal force in the solid-state body, wherein a strength of the external or internal force is sufficient for crack propagation to occur along the detachment region,
wherein introducing the external force into the solid-state body comprises:
arranging a receiving layer on an exposed surface of the composite structure or of the solid-state layer to be separated, wherein the receiving layer comprises a polymer material;
subjecting the receiving layer to thermal stress for generation of stresses in the solid-state body, including cooling the receiving layer to a temperature below ambient temperature,

wherein the cooling comprises subjecting the polymer material of the receiving layer to a glass transition,
wherein the stresses cause a crack to propagate in the solid-state body along the detachment region,
wherein the first solid-state layer separates from the solid-state body along the crack.