Patent ID: 6591491
Filing Date: 2003-07-15
Classification: H01L,H05K,Y10T

Abstract:
A method for producing a multilayer circuit board which is adapted to have a semiconductor device electrically connected thereto, said method comprising:forming on a support board, as a first component of the multilayer circuit board, a multilayered interposer for providing an electrical connection between the semiconductor device and an intermediate multilayer circuit board, the multilayered interposer having first and second sides, the first side being adjacent the support board and being formed with terminals having pitches which correspond to pitches of terminals of the semiconductor device and the second side being formed with terminals having pitches which correspond to pitches of terminals of the intermediate multilayer circuit board, the pitches of the terminals of said second side being larger than the pitches of the terminals formed on the first side; forming, as a separate second component of the multilayer circuit board, the intermediate multilayer circuit board; joining said multilayered interposer, to said intermediate multilayer circuit board such that the support board is facing outwardly; and removing the support board.