Patent ID: 9308715
Filing Date: 2016-04-12
CPC Classification: B32B,C08G,H01L,Y10T

Claim Text:
1. A method for separating a support plate from a substrate, the method including: providing a laminate including a substrate having a major surface, a support plate transmissive to an infrared light, an adhesive layer interposed between the support plate and the substrate, and a separation layer interposed between the support plate and the adhesive layer, wherein the separation layer comprises an infrared absorbent compound and includes a first portion and a second portion adjacent to the first portion when viewed from a direction perpendicular to the major surface, wherein the adhesive layer does not comprise an optical curing resin, selectively emitting an infrared light beam to the first portion of the separation layer via the support plate while not emitting the infrared light to the second portion of the separation layer, such that the first portion of the separation layer is denatured as the infrared absorbent compound absorbs the infrared light beam and that the second portion remains undenatured and subsequently, while the second portion of the separation layer remains undenatured after infrared light emission, exerting an external force to the laminate to separate the support plate from the substrate.