Patent ID: 7616451

Claim:
A semiconductor package substrate suitable for supporting a damage-sensitive device having a base, comprising: a) a package substrate core having a first and an opposite surface, said first surface being surmounted by said damage sensitive device; b) at least one pair of metal layers covering said first and opposite surfaces of said package substrate core, which define, respectively, a first metal layer group comprising at least one metal layer and an opposite metal layer group comprising at least one metal layer, at least one of said layer groups comprising at least one metal support zone; c) one pair of solder mask layers covering the outermost metal layers of said at least one pair of metal layers; and d) a plurality of routing lines; wherein said at least one metal support zone is formed so as to lie beneath at least one side of the base of said damage-sensitive device and so as to occupy a substantial portion of the area beneath the base of said damage-sensitive device which is free of said routing lines.