Semiconductor chip-mounting board providing a high bonding strength with a semiconductor chip mounted thereon

Claim 1

A semiconductor chip-mounting board comprising a semiconductor chip-mounting face where bonding lands are formed and are electrically connected in a flip chip-mounting method to electrodes formed at a circuit formation face of a semiconductor chip, and a circuit board-mounting face, opposed to the semiconductor chip-mounting face, which allows an electrical connection to be established between the semiconductor chip-mounting board and a circuit board; wherein a strengthening land is provided at the semiconductor chip-mounting face, the strengthening land being connected via a bonding material to a non-operating electrode formed on the circuit formation face and functionally not related to the semiconductor chip, thereby to increase a connection strength between the semiconductor chip and the semiconductor chip-mounting board; wherein the strengthening land formed on the semiconductor chip-mounting face is strip-shaped extending radially to the mounted semiconductor chip in a length preventing the bonding material from spreading beyond a width thereof over the semiconductor chip-mounting face, and in a direction from a contact point thereof to a bump on the electrode to a central part of the semiconductor chip; and wherein a sealing resin is provided between the semiconductor chip and the semiconductor chip-mounting board, and the semiconductor chip-mounting board has a glass transition point exceeding a setting temperature of the sealing resin so as to reduce differences of thermal expansion coefficients at a setting of the bonding material and the sealing resin, resulting in reduction of stresses acting to bonded parts between the lands and bumps on the electrodes.