Patent ID: 8771458
Filing Date: 2014-07-08
Classification: B32B,H05K,Y10T

Abstract:
1. A method of making a wiring board, comprising: measuring an apparent melt viscosity of a thermotropic liquid crystal polymer of a thermotropic liquid crystal polymer film on a lot to lot basis; and if the measured apparent melt viscosity of a lot is not in the range of from 1×10 then laminating the thermotropic liquid crystal polymer film on a wiring board material having one layer, containing an exposed electroconductive circuit; and hot pressing the thermotropic liquid crystal polymer film and the wiring board material having one layer together to provide the wiring board; wherein a temperature of the hot pressing is a temperature in the range from 240 to 350° C., and the apparent melt viscosity is measured at a frequency of 1 Hz.