Patent ID: 9015936
Filing Date: 2015-04-28
Classification: H01L,H05K,Y10T

Abstract:
1. A method for manufacturing an IC substrate, comprising: providing a roll of double-sided flexible copper clad laminate, the roll of double-sided flexible copper clad laminate comprising a first copper layer, a flexible insulating layer, and a second copper layer, the flexible insulating layer being sandwiched between the first and second copper layers; forming a plurality of conductive vias, patterning the first copper layer to form a first wiring layers, and patterning the second copper layer to form a second wiring layers in a roll to roll manner, the first wiring layer being electrically connected to the second wiring layer by at least one conductive via, thereby converting the roll of double-sided flexible copper clad laminate into a roll of double-sided flexible wiring board; cutting the roll of double-sided flexible wiring board into a plurality of separate sheets of double sided flexible wiring board, each of the sheet of double sided flexible wiring board comprising a plurality of wiring board units, each wiring board unit comprising the first wiring layer, the flexible insulating layer, and a second wiring layer; forming a first rigid insulating layer on the first wiring layer of each sheet of double sided flexible wiring board by lamination, and forming a second rigid insulating layer on the second wiring layer of each sheet of double sided flexible wiring board by lamination; forming a third wiring layer on the first rigid insulating layer, and electrically connecting the first wiring layer and the third wiring layer, forming a fourth wiring layer on the second rigid insulating layer, and electrically connecting the fourth wiring layer and the second wiring layer, thereby obtaining a sheet of substrate having a plurality of IC substrate units; and cutting the sheet of substrate into separate IC substrate units.