Abstract:
A terminal structure includes: a pillar containing a first metal material; and a cover layer covering an upper surface and a side surface of the pillar, the cover layer containing a second metal material into which a solder material diffuses more slowly than into the first metal material.And the terminal structure further includes a bonding layer over the cover layer, the bonding layer containing a metal material capable of solder bonding.
Abstract:
An electronic part includes a substrate, an insulating film formed over the substrate, a first pillar electrode, a first solder formed over the first pillar electrode, a second pillar electrode, and a second solder formed over the second pillar electrode. The first pillar electrode over which the first solder is formed is formed over a first region of an insulating film including a level difference between a first opening portion and a peripheral portion of the first opening portion. The second pillar electrode over which the second solder is formed is formed over a second region of the insulating film including a second opening portion whose opening area is larger than that of the first opening portion. For example, the second pillar electrode over which the second solder is formed is formed over the second opening portion of the insulating film.
Abstract:
Surfaces of a semiconductor chip and a circuit board are made to face each other, and upper portions of stoppers of the circuit board are fit into regions between adjacent stoppers of rail grooves of the semiconductor chip, and upper portions of the stoppers of the semiconductor chip are fit into regions between the adjacent stoppers of rail grooves of the circuit board, whereby side surfaces of first terminals of the semiconductor chip and side surfaces of second terminals of the circuit board are electrically connected.