Abstract:
A printed circuit board providing high reliability using a packaging of high capacity semiconductor chip, a semiconductor package, and a card and a system using the semiconductor package. The semiconductor package includes a substrate having a first surface and a second surface, a semiconductor chip mounted on the first surface of the substrate, at least one land disposed on the second surface of the substrate, and whose circumference includes a plurality of first group arcs, a mask layer covering the second surface of the substrate and including at least one opening that exposes the at least one land, and at least one external terminal disposed on the at least one land, wherein a portion of the at least one land is covered by the mask layer, and a sidewall of another portion of the at least one land is exposed by the at least one opening, and the circumference of the at least one opening includes a plurality of second group arcs, and a radius of the outermost arc from among the plurality of first group arcs is equal to a radius of the outermost arc from among the plurality of second group arcs.
Abstract:
Provided are a circuit board, a semiconductor package including the circuit board, a method of fabricating the circuit board, and a method of fabricating the semiconductor package. The method of fabricating the circuit board includes: forming at least one pair of rows of first bonding pads arranged on a base substrate in a first direction, and a first central plating line formed between the rows of first bonding pads to commonly connect with the rows of first bonding pads; forming an electroplating layer on the first bonding pads; and exposing the base substrate by removing the first central plating line.
Abstract:
A printed circuit board providing high reliability using a packaging of high capacity semiconductor chip, a semiconductor package, and a card and a system using the semiconductor package. The semiconductor package includes a substrate having a first surface and a second surface, a semiconductor chip mounted on the first surface of the substrate, at least one land disposed on the second surface of the substrate, and whose circumference includes a plurality of first group arcs, a mask layer covering the second surface of the substrate and including at least one opening that exposes the at least one land, and at least one external terminal disposed on the at least one land, wherein a portion of the at least one land is covered by the mask layer, and a sidewall of another portion of the at least one land is exposed by the at least one opening, and the circumference of the at least one opening includes a plurality of second group arcs, and a radius of the outermost arc from among the plurality of first group arcs is equal to a radius of the outermost arc from among the plurality of second group arcs.
Abstract:
Provided are a circuit board, a semiconductor package including the circuit board, a method of fabricating the circuit board, and a method of fabricating the semiconductor package. The method of fabricating the circuit board includes: forming at least one pair of rows of first bonding pads arranged on a base substrate in a first direction, and a first central plating line formed between the rows of first bonding pads to commonly connect with the rows of first bonding pads; forming an electroplating layer on the first bonding pads; and exposing the base substrate by removing the first central plating line.
Abstract:
A motherboard may have contact pads arranged along a peripheral region on one or both surfaces thereof. A memory module may have unit packages fixed to an upper plate and a lower plate of a module frame. The unit packages may be spaced apart from each other. The upper and the lower unit packages may have contact terminals facing each other. The contact terminals may be elastically bendable, and/or the unit packages may be mounted on the plates via elastic members. The peripheral region of the motherboard may be inserted into the memory module, so the contact terminals of the memory module may elastically contact with and be electrically coupled to the contact pads of the motherboard.
Abstract:
A motherboard may have contact pads arranged along a peripheral region on one or both surfaces thereof. A memory module may have unit packages fixed to an upper plate and a lower plate of a module frame. The unit packages may be spaced apart from each other. The upper and the lower unit packages may have contact terminals facing each other. The contact terminals may be elastically bendable, and/or the unit packages may be mounted on the plates via elastic members. The peripheral region of the motherboard may be inserted into the memory module, so the contact terminals of the memory module may elastically contact with and be electrically coupled to the contact pads of the motherboard.