Patent ID: 9174412
Filing Date: 2015-11-03
Classification: B29K,B32B,G21K,H01J,Y10T

Abstract:
1. A wafer comprising: a. at least one sheet of carbon fiber composite (CFC) including carbon fibers embedded in a matrix; b. a wafer thickness of between 10-500 micrometers; c. at least one side of the wafer having a root mean square surface roughness Rq of less than 300 nm in an area of 100 micrometers by 100 micrometers and less than 500 nm along a line of 2 millimeter length; d. a yield strength at fracture of greater than 0.5 gigapascals (GPa), wherein yield strength is defined as a force, in a direction parallel with a plane of a side of the wafer, per unit area, to cause the wafer to fracture; and e. a strain at fracture of more than 0.01, wherein strain is defined as the change in length caused by a force in a direction parallel with a plane of the wafer divided by original length.