发明授权
US08766439B2 Integrated circuit chip with pyramid or cone-shaped conductive pads for flexible C4 connections and a method of forming the integrated circuit chip 失效
具有用于灵活C4连接的金字塔或锥形导电焊盘的集成电路芯片和形成集成电路芯片的方法

Integrated circuit chip with pyramid or cone-shaped conductive pads for flexible C4 connections and a method of forming the integrated circuit chip
摘要:
Disclosed is a chip and method of forming the chip with improved conductive pads that allow for flexible C4 connections with a chip carrier or with another integrated circuit chip. The pads have a three-dimensional geometric shape (e.g., a pyramid or cone shape) with a base adjacent to the surface of the chip, a vertex opposite the base and, optionally, mushroom-shaped cap atop the vertex. Each pad can include a single layer of conductive material or multiple layers of conductive material (e.g., a wetting layer stacked above a non-wetting layer). The pads can be left exposed to allow for subsequent connection to corresponding solder bumps on a chip carrier or a second chip. Alternatively, solder balls can be positioned on the conductive pads to allow for subsequent connection to corresponding solder-paste filled openings on a chip carrier or a second chip.
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