Patent ID: 6423405
Filing Date: 2002-07-23
Classification: H01L,H05K,Y02P,Y10T

Abstract:
A circuit board, comprising:a substrate; and a high polymer material layer formed on a surface of said substrate, including a first area of said high polymer material layer on which to implement an electronic part, and a second area different from said first area of said high polymer material layer on which no electronic part is to be implemented; wherein said first area is an area processed by irradiating a light energy, the wavelength of said light energy being in a range from 100 to 600 nm, and the energy density of said light energy being more than 0.03 J/cm2 and less than or equal to 0.5 J/cm2; and the wettability on said first area is greater than the wettability on said second area, in accordance with a liquid material contact angle on said first area being smaller than that on said second area.