MULTILAYER CIRCUIT BOARD, INSULATING SHEET, AND SEMICONDUCTOR PACKAGE USING MULTILAYER CIRCUIT BOARD

摘要

SEMICONDUCTOR CHIP MOUNTING YIELD AND SEMICONDUCTOR PACKAGE RELIABILITY DETERIORATE DUE TO WARPAGE OF A MULTILAYER CIRCUIT BOARD. A MULTILAYER CIRCUIT BOARD (1) USING AN INTERLAYER INSULATING LAYER (6) CAN SUPPRESS WARPAGE OF THE ENTIRE MULTILAYER CIRCUIT BOARD (1) BY MAKING THE INTERLAYER INSULATING LAYER (6) SERVE AS A BUFFER MATERIAL. IN THE MULTILAYER CIRCUIT BOARD (1) USING THE INTERLAYER INSULATING LAYER (6), CONDUCTOR CIRCUIT LAYERS (11) AND INTERLAYER INSULATING LAYERS (6) ARE ALTERNATELY ARRANGED. THE INTERLAYER INSULATING LAYER (6) TO BE USED IN THE MULTILAYER CIRCUIT BOARD (1) INCLUDES A FIRST INSULATING LAYER AND A SECOND INSULATING LAYER HAVING AN ELASTIC MODULUS HIGHER THAN THAT OF THE FIRST INSULATING LAYER. (FIG.2)