Patent ID: 6392159
Filing Date: 2002-05-21
Classification: H05K

Abstract:
A circuit board structure for facilitating engineering changes for a multichip module mounted on the circuit board, the structure comprising:a first layer contiguous with a portion of a surface of the circuit board, said first layer being of a conductive material: a second layer overlying said surface of the circuit board, a portion of said second layer being contiguous with said first layer and a portion of said second layer being contiguous with said surface of the circuit board, said second layer having openings therein; and a first bonding pad and a second bonding pad formed in the openings of said second layer, said first bonding pad and said second bonding pad being of a conductive material and in contact with said first layer, wherein the multichip module is surrounded by a hermetic seal on said second layer so that said first bonding pad is inside a hermetically sealed area of the circuit board and said second bonding pad is outside the hermetically sealed area.