摘要:
A semiconductor package includes: a semiconductor element mounted on a one-sided plane of a wiring board; an underfill agent dropped so as to be filled between the semiconductor element and the wiring board; and a pad group constituted by a plurality of pads which are formed in the vicinity of a circumference of the wiring board and along the circumference, the pad group being formed on a bottom plane of a groove portion formed in a solder resist which covers the one-sided plane of the wiring board, wherein a corner edge of the groove portion located in the vicinity of a dropping starting portion to which dropping of the underfill agent is started is formed at an obtuse angle or in an arc shape in order to avoid the dropped underfill agent from entering into an inner portion of the groove portion.
摘要:
A semiconductor package includes: a semiconductor element mounted on a one-sided plane of a wiring board; an underfill agent dropped so as to be filled between the semiconductor element and the wiring board; and a pad group constituted by a plurality of pads which are formed in the vicinity of a circumference of the wiring board and along the circumference, the pad group being formed on a bottom plane of a groove portion formed in a solder resist which covers the one-sided plane of the wiring board, wherein a corner edge of the groove portion located in the vicinity of a dropping starting portion to which dropping of the underfill agent is started is formed at an obtuse angle or in an arc shape in order to avoid the dropped underfill agent from entering into an inner portion of the groove portion.
摘要:
It is a flip-chip mounting substrate according to the invention has a wiring pattern in which bonding pads and predetermined parts of lead wires continuously extending from the bonding pads are exposed from an insulating layer or a solder resist. In the flip-chip mounting substrate, exposed parts of the wiring pattern are formed in to a plurality of different shapes. The exposed parts are formed so that the areas of the bonding pads are substantially equal to one another, and that the total areas of predetermined parts of the lead wires continuously extending from the bonding pads are substantially equal to one another.
摘要:
A solder resist and a central pad to which a central Au bump provided on a semiconductor chip is flip-chip bonded are formed on a substrate main body. In a flip-chip mounting substrate where an underfill resin is provided after the semiconductor chip is mounted, a central opening portion for exposing the central pad is formed in the solder resist, and also, an edge portion forming the outer peripheral portion of the solder resist is partially overlapped with the outer peripheral portion of the central pad.
摘要:
A mounting substrate for mounting a semiconductor chip in a flip chip manner, having a plurality of connection pads to which the semiconductor chip is connected, an insulating pattern formed so as to cover a part of the connection pads, and a plurality of dummy patterns for controlling a flow of an underfill infiltrated below the semiconductor chip, characterized in that the plurality of dummy patterns are arranged in staggered lattice shape.
摘要:
A wiring substrate includes: a semiconductor chip on which a plurality of bumps are mounted, and a plurality of connection pads which are joined to the bumps mounted on the semiconductor chip in a flip chip method, wherein the connection pads of a peripheral portion of the wiring substrate are formed in a non-solder mask defined structure, and the connection pads of a center portion of the wiring substrate are formed in a solder mask defined structure.
摘要:
A solder 14 is formed, by a plating method, on a connecting surface 21A and a side surface 21B in a connecting pad 21 of a wiring board 11 which is opposed to a metal bump 13 formed on an electrode pad 31 of a semiconductor chip 12, and subsequently, the solder 14 is molten to form an accumulated solder 15 taking a convex shape on the connecting surface 21A of the connecting pad 21 and the metal bump 13 is then mounted on the connecting surface 21A of the connecting pad 21 on which the accumulated solder is formed, and the accumulated solder 15 and the metal bump 13 are thus bonded to each other.
摘要:
It is a flip-chip mounting substrate according to the invention has a wiring pattern in which bonding pads and predetermined parts of lead wires continuously extending from the bonding pads are exposed from an insulating layer or a solder resist. In the flip-chip mounting substrate, exposed parts of the wiring pattern are formed in to a plurality of different shapes. The exposed parts are formed so that the areas of the bonding pads are substantially equal to one another, and that the total areas of predetermined parts of the lead wires continuously extending from the bonding pads are substantially equal to one another.
摘要:
A solder resist and a central pad to which a central Au bump provided on a semiconductor chip is flip-chip bonded are formed on a substrate main body. In a flip-chip mounting substrate where an underfill resin is provided after the semiconductor chip is mounted, a central opening portion for exposing the central pad is formed in the solder resist, and also, an edge portion forming the central opening portion of the solder resist is partially overlapped with the outer peripheral portion of the central pad.
摘要:
A wiring substrate includes: a semiconductor chip on which a plurality of bumps are mounted, and a plurality of connection pads which are joined to the bumps mounted on the semiconductor chip in a flip chip method, wherein the connection pads of a peripheral portion of the wiring substrate are formed in a non-solder mask defined structure, and the connection pads of a center portion of the wiring substrate are formed in a solder mask defined structure.