Patent ID: 7239014

Claim:
A capacitor-built-in-type printed wiring substrate for mounting an IC chip or IC-chip-carrying printed wiring substrate, comprising: a wiring substrate ( 520 ), and a capacitor ( 530 ) having on respective opposite sides thereof first and second substantially parallel capacitor main surfaces ( 530 A, 530 B), said capacitor comprising: a pair of electrodes ( 533 E, 533 F) or of electrode groups, the electrodes being disposed in a plurality of electrode layers ( 533 ) formed between dielectric layers ( 532 ); a plurality of first capacitor terminals ( 534 , 531 ) arranged on the first capacitor main surface and capable of being respectively flip-chip-bonded or bonded in a connection-face-to-connection-face manner to a plurality of connection-to-capacitor terminals ( 503 ) of the IC chip or IC-chip-carrying printed wiring substrate; via conductors ( 535 E, 535 F) extending through the dielectric layers and electrically connecting each said first capacitor terminal to a respective one of said pair of electrodes or of electrode groups, each one of said pair of electrodes or of electrode groups being electrically connected to at least one of the plurality of first capacitor terminals; and a plurality of second capacitor terminals ( 536 A, 536 B, 536 C) arranged on the second capacitor main surface and electrically connected to a wiring layer ( 575 ) of the wiring substrate, wherein the printed wiring substrate comprises a plurality of substrate terminals ( 551 , 552 ) capable of being respectively flip-chip-bonded or bonded in a connection-face-to-connection-face manner to a plurality of connection-to-substrate terminals ( 504 ) of the IC chip or IC-chip-carrying printed wiring substrate; characterized in that the capacitor is fixed in a capacitor accommodation cavity formed in the printed wiring substrate by means of insulating resin ( 523 A), and in that the plurality of second capacitor terminals ( 536 ) are disposed at intervals greater than those of the plurality of first capacitor terminals ( 534 ).