Amkor Technology, Inc.

Ho Choi

Byong Jin Kim

Min Chul Shin

Min Woo Lee

Eun Sook Sohn

Chan Ha Hwang

Ji Yeon Yu

Methods and devices for a semiconductor device having conductive pads to prevent solder reflow are disclosed and may include a substrate comprising conductive pads of rectangular shape and neck-down portions on opposite sides of the rectangular shape, a semiconductor die comprising conductive pillars, and a solder electrically coupling the conductive pillars to the conductive pads. The neck-down portions may comprise a solder mask for the conductive pads to prevent solder from flowing in an unwanted direction on the conductive pads. The conductive pillars may comprise an elliptical cross-section with a minor axis length X and a major axis length Y. The major axis of the elliptical cross-section may be parallel to a long axis of the rectangular shape of the conductive pads. A decrease (W) in width of the conductive pads from the rectangular shape to the neck-down portions may be defined by X/5&#x2266;W&#x2266;X/2.

Semiconductor device having conductive pads with neck-down portions to prevent solder reflow

A semiconductor device has a substrate having a plurality of conductive pads formed thereon. A semiconductor die is provided having a plurality of conductive pillars formed thereon. A solder is used for electrically coupling the conductive pillars to the conductive pads. Solder mask is formed on portions of the conductive pads to prevent the solder from flowing in an unwanted direction on the conductive pads.

Semiconductor device having conductive pads to prevent solder reflow

In accordance with the present invention, there is provided multiple embodiments of a package-in-package semiconductor device including shortened electrical signal paths to optimize electrical performance. The semiconductor device comprises a substrate having a conductive pattern formed thereon. In each embodiment of the semiconductor device, a semiconductor package and one or more semiconductor dies are vertically stacked upon the substrate, and placed into electrical communication with the conductive pattern thereof. In certain embodiments, a semiconductor die which is electrically connected to the conductive pattern of the substrate may be fully or partially covered with a film-over-wire. Additionally, in each embodiment of the semiconductor device, the vertically stacked electronic components thereof may be covered with a package body which also partially covers the substrate.

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Kyunggi-do, South Korea

Ho Choi